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"ventilation systems and ventilators"

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AIRTRAK™ - Coal Drops Yard

AIRTRAK™ - Coal Drops Yard

Nicholson STS Ltd

Nicholson AIRTRAK™ ventilators were used in the retail destination Coal Drops Yard in Kings Cross.
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HOWGATE CLOSE

HOWGATE CLOSE

Velfac Windows

With average daily energy bills of only 24p, the cottages at Howgate Close have earned a reputation as possibly the UK’s most energy-efficient homes*. Built by farmer Dr Chris Parsons, the row of nine, single storey cottages exploits a range of passive solar design principles** - including a southerly orientation, a high thermal mass and a earth-bonding (external walls partially covered in soil) - to create homes which are exceptionally energy efficient and comfortable to live in. The homes are also truly affordable as no artificial heat source is required to deliver a stable internal temperature averaging 21-23 degrees Centigrade. The cottages instead use a mix of passive heat sources, created by people and appliances, and solar gain generated through VELFAC triple glazed aluminium / timber windows. As a result, the energy consumption of a two bedroom cottage is 94% less than the average UK household. The architecture of Howgate Close is based on designs created by sustainability housing experts Hockerton Housing Project** ( https://www.hockertonhousingproject.org.uk/) with performance further enhanced by Dr Jerry Harrall (https://drharrall.com) a consultant in the design and adaptation of fossil-fuel-free buildings. ‘Describing Howgate Close as a development of eco-homes is to understate its performance,’ states Dr Harrall. ‘In fact all nine properties operate beyond zero-carbon, and instrumental to the success of Howgate Close is the installation of VELFAC composite triple glazing, specified for its excellent thermal performance.’ A key feature of every cottage is a large, white framed VELFAC composite window screen installed on south facing facades. The screens combine fixed units and a sliding patio door, and with dimensions of up to 3m x 5m occupy almost the entire wall. ‘The VELFAC windows play a crucial role in achieving a SAP rating for each cottage of around 143, potentially the highest group of SAP rating’s in the country and a significant improvement of the average rating of 63,’ says Dr Harrall. ‘VELFAC triple glazing has a U-value of 0.8W/m2K which reduces the rate of heat loss while bringing more natural light into each home, thereby reducing the need for artificial light,’ says Dr Harrall. ‘Across the development, the windows are actually net gatherers of heat, and contribute to an annual energy surplus which we estimate will be enough to power another similar dwelling.’ Unwanted solar gain is minimised by the exceptional insulation afforded by the triple glazed units, enhanced by low emissivity coatings applied to inner glass panes. Ventilation is primarily mechanical but supported by trickle vents within the window frames, and by cross ventilation using additional, smaller VELFAC windows installed in the rear facade. ‘Triple glazing also delivers excellent acoustic insulation,’ adds Dr Harrall, ‘which is important, as the cottages are located within actively cultivated farmland, and are near a busy road and wind turbines.’ Howgate Close is now a model development for affordable, ultra-low energy homes and is also the focus of a two year research and monitoring project, co-run by Dr Harrall and Professor Anton Ianakiev, Professor in Sustainable Energy Systems at Nottingham Trent University (NTU). ‘I have also co-authored an academic paper on Howgate Close,’ adds Dr Harrall, ‘which aims to show that it is possible to design, construct and live in buildings without resort to fossil fuels.’—ends— * Analysis by Elmhurst Energy, the UK’s largest independent provider of energy assessment, retrofit and property professional training, software and accreditation. * * Principles advanced by Professors Brenda and Robert Vale, architects of the Hockerton Housing Project, the design of which inspired Howgate Close.
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Maerua Mall

Maerua Mall

SE Controls

A natural ventilation solution from SE Controls Africa is helping shoppers at Maerua Mall in Namibia to keep their cool.
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Linea 23

Linea 23

Rock Unique

Linea23 is an architectural residential project designed by Studio Sigurtà in Desenzano del Garda, for which various Atlas Concorde porcelain tiles were chosen for the creation of ventilated walls, outdoor floors and walls.The Trust and Studio ceramic collections are the protagonists of the project and outer facades were covered using ventilated walls in which ceramic tiles create a gap that facilitates the circulation of air. The use of ventilated walls also leads to other advantages: the building is protected from moisture while indoor spaces are healthier and do not suffer from thermal shock.The Trust collection by Atlas Concorde, used for the outdoor floors and swimming-pool edges, evokes natural stone and allows for alluring residential venues both indoors and outdoors.The Linea23 project saw the use of various Atlas Concorde products for outdoor floors and walls. Particularly resistant to thermal shock, Atlas Concorde porcelain tiles are the perfect solution also as terrace flooring.
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LIV Student Accomodation

LIV Student Accomodation

Sertus

Sertus were commissioned to provide a roof mechanical pod, along with Shaft Louvre Dampers on this project.Project Name: LIV Student AccommodationLocation: SheffieldSector: Student AccommodationClient: Valeo ManagementInitial Brief:Sertus were approached to work closely with key stakeholders on the project and deliver smoke ventilation products that answered all the technical specifications.Outcome:Sertus products were fully commissioned in May 2020, providing the corridors with both environmental and smoke ventilation ready for the fresh intake of students.
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Sudbury House

Sudbury House

Sertus

While the residents were still occupying the building, Sertus manufactured bespoke smoke ventilation products for this project.Project Name: Sudbury HouseLocation: WandsworthSector: ResidentialClient: Richmond & Wandsworth Borough CouncilInitial brief:Sertus worked with the local council to provide Façade Louvre Blade smoke ventilation products for Sudbury Tower in London. Take a look at this product here.Outcome:The manufacture, packaging and delivery of Sertus products ran smoothly, delivering total peace of mind for client, contractor and residents alike.
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The Erratics Exhibition

The Erratics Exhibition

ROCKWOOL Ltd

The Erratics Exhibition features an impressive 6.5m by 5.5m sculpture, created by Lubna Chowdhary, who fabricated a stunning giant modular sculpture using ROCKWOOL® RockLap heating and ventilation pipe (H&V) sections.Lubna Chowdary chose ROCKWOOL RockLap sections as it was a material that could be easily formed and constructed into more complex shapes with minimal tools and processes.Traditionally used for heating and ventilation pipes in a range of settings, ROCKWOOL RockLap sections have been proven to deliver thermal insulation performance.
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Parkview Green

Parkview Green

SE Controls

Façade automation to achieve a hybrid environmental ventilation solution to create a controllable microclimate to optimise energy consumption/thermal comfort.
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ROOFBOX™ - University accommodation

ROOFBOX™ - University accommodation

Nicholson STS Ltd

This project used 54 ROOFBOX™ cabinets and kerbs to house many duct and ventilation penetrations across two roofs.
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Borrisokane Community College

Borrisokane Community College

Bauder Ltd

Borrisokane Community CollegeBauder Thermofol PVC single ply waterproofing systemSynopsisOriginally constructed in the 1970s on the site of former workhouses in County Tipperary, the Borrisokane Community College building needed to be demolished and replaced, having exceeded its serviceable life. The client wanted to bring a modern and refreshed appearance to what is a site of great historical significance and the new building’s roof played an integral role in achieving this; with the majority of the roof areas sloping inwards towards the open central courtyard area making them highly visible.Bauder Building BoardProject:Borrisokane Community CollegeLocation:BorrisokaneRoof Area:3,650m²Specifier:Healy & Partners Architects Main Contractor:JJ Rhatigan & Co.Approved Contractor:Priority Roofing & CladdingThe specificationRoof areas totalling over 3,000m2 were fitted with Bauder’s Thermofol single ply fleece backed membrane, which is lightweight, visually appealing and possesses a high tensile strength of ≥ 1100N/50 mm. The system build-up included 160 mm of Bauder’s Thermotech Glass Insulation for superior thermal performance, ensuring the roof achieved the required 0.19 U-Value, and PVC roof profiles were also installed as a cost effective way of replicating the appearance of a standing seam metal roof. Bauder supplied new rooflights to deliver high standards of illumination, insulation and ventilation, and smaller single storey roofs were waterproofed with its bituminous Bauderflex system.Products appliedBauder ThermofolA high quality single ply PVC system with a life expectancy in excess of 30 years.Bauder ThermotechAn efficient PIR insulation board with a coated glass tissue facing on both sidesThe result Despite the various design and logistical challenges encountered, all roofing works were completed to budget and in time for the start of the inaugural school term much to the delight of everyone involved in the project. System installedBauderThermofol PVC single ply waterproofing system1 Bauder Thermofol U15 FRA 1.5mm thick, reinforced PVC waterproofing membrane. Stated within BBA certificate 06/4354, the Thermofol PVC waterproofing membranes have a service life in excess of 35 years. 2 Bauder ThermotechAn efficient PIR insulation board with a coated glass tissue facing on both sides.3 BauderTEC KSD FBSA 2.5mm depth, self-adhesive air & vapour control layer with a mica finish.AdvocacyHealy & Partners Architects:“Bauder delivered a roofing solution of the highest quality, providing expert technical support throughout the project. Their single ply waterproofing system has undeniably helped in transforming the appearance of the college and most importantly given the client total confidence with regards to their roof’s long term future performance.”
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Cornell Quarter

Cornell Quarter

Sertus

Sertus were commissioned to provide natural smoke ventilation products for the university.Project Name: Cornell QuarterLocation: Teesside UniversitySector: Student AccommodationClient: Teesside UniversityInitial BriefIn 2019, Sertus began working closely with contractors on one of Teesside University's new student accommodation developments to ensure that the smoke ventilation products are installed in accordance with Approved Document B. In this project, Sertus' RSL-R product was used. View it here.OutcomeThe project was handed over ahead of schedule with no snags, ready for the student intake of September 2020.
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Bespoke Glazed Access - Stratton House, London

Bespoke Glazed Access - Stratton House, London

Surespan

Surespan is increasingly being asked to provide specialist glazed access and ventilation solutions. Project:The architects working on a project at Stratton House in London, approached Surespan to design and manufacture a“bird wing” style, double-leaf glazed ventilator with concealed operating gear from below. Surespan was chosen for its expertise in producing bespoke products.Product:The operation of each leaf ensured maximum airflow into the building below and smoke release in the event of a fire. Measuring 2500 x 2000mm and polyester powder coated white to match existing building roof furniture.
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North East Futures University Technical College

North East Futures University Technical College

VELUX Commercial

Optimised levels of natural light and ventilation have transformed a Grade II Listed Building into a highly productive learning space The main challenge for Newcastle-based Xsite Architecture was to refurbish the Hawthorne building so that it created a space where students wanted to congregate in the communal areas beneath, yet still satisfied Listed Buildings’ requirements and maintained the feel of the industrial heritage of the site. A key requirement was high levels of natural light and ventilation and the architects took their lead from the mounting body of research that shows how these elements can increase learning capacity.
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Cape Town Car Dealerships

Cape Town Car Dealerships

SE Controls

SE Controls smoke ventilation products have been used at two new prestige, sports and SUV car dealerships in Tokai, Cape Town.
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George Abbot School

George Abbot School

Bauder Ltd

George Abbott SchoolBauder Thermofol single ply waterproofing system with Bauder Euroglaze rooflightsSynopsisLocated in Guildford, George Abbot School is a secondary education school which provides education for 2000 people aged 11 to 18. The school had a history of leaks in the DT rooms above which a profiled sheet metal roof was installed.Following many attempted repairs, Bauder was commissioned to carry out a roof survey on the 228m² profiled sheet metal roof. The report identified issues with not only the gutter area, which was originally believed to be the problematic area, but also with the adjoining profiled roof and also with the large rooflight unit.Bauder Building BoardProject: George Abbott SchoolLocation: Guildford, SurreyRoof Area: 228m²Specifier: Baily GarnerApproved Contractor: Inspire Contract ServicesThe specification Bauder submitted a proposal to refurbish all areas of the failing roof:The gutter area needing standing water to be removed for which Bauder tapered insulation was proposed to create effective drainage falls.The adjoining profiled sheet metal roof requiring a new waterproofing system. The Bauder Profiled Roof Overlay system was determined to be the best solution, using bespoke profiled insulation boards specifically designed to fit the shape of the roof. The Thermofol U15 Fleece Back membrane was then specified as the waterproofing layer providing a robust yet lightweight waterproofing system to the roof.The existing rooflight unit, being one of the problematic areas of the rooftop, was also replaced with Bauder Euroglaze rooflights. Products appliedInsulation infill systemIntended for refurbishing profiled sheet metal roofs or increasing the thermal performance of existing insulated cladding systems.Bauder Euroglaze rooflightsModular rooflight designed to provide high standards of illumination, insulation and ventilation to the interior of flat roofed buildings. These are made to order and the size can therefore be tailor made to fit any roof aperture. The resultBauder approved contractor, Inspire Contracts, installed the roof system and rooflights. Bauder’s expert site technicians carried out over 10 site visits during the 4 months of works on the site. Following a final site visit and a leak test Bauder was able to issue a 20 year product and workmanship guarantee to the client.The choice to use Bauder, a single source of manufacturing for the roof systems and the rooflight, proved beneficial as it enabled Bauder’s flat roof technician team to design out a number of the detailing issues responsible for the historic leak problems and it also eased the installation process for the client and the approved contractor, as Bauder provided its integral service from the roof survey to the final site visit and the issue of the guarantee.System installed Bauder Thermofol PVC single ply waterproofing system 1 Bauder THERMOFOL U15 FRA 1.5mm thick, reinforced PVC waterproofing membrane. Stated within BBA certificate 06/4354, the Thermofol PVC waterproofing membranes have a service life in excess of 35 years. 2 Bauder PIR MTissue-faced flat board insulation, benefitting from a zero ODP and a Green guide rating of ‘A’.3 DeckProfiled sheet metal
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Making the impossible possible

Making the impossible possible

RENOLIT Cramlington Ltd

UNIZO office building CHALLENGE Dedalus Architects specified zinc for waterproofing the timber frame UNIZO office building in Eeklo. Not only for the roof, but also for the facade and bottom side of a unique construction detail. To be precise, waterproofing horizontally, vertically and even upside down! To entirely cover the structure however, appeared not to be possible when using zinc. If you opt to use this traditional waterproofing material a ventilated air space must be provided underneath the zinc covering. This of course entails an opening for ventilation purposes underneath the roof edge, if not, condensation will occur. In the case of a building where the facade has to connect seamlessly with the roof and the underside, leaving an opening is not a possibility. So, despite the attractive appearance of zinc, a waterproofing solution with this material was not an option. SOLUTION Thanks to their collaboration with roofer ALBITUM and previous experiences with RENOLIT roofing products, Dedalus Architects came up with a nice alternative: RENOLIT ALKORDESIGN standing seam imitation. A perfect solution for a difficult challenge. No ventilation needed, no connection problems, the same looks as a zinc roof and, above all, more cost effective! 
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Sto Helps Create Striking Appearance For New University Building

Sto Helps Create Striking Appearance For New University Building

Sto Ltd

The Roscoe building in the Greenbank Student Village at the University of Liverpool completed with the installation of 5,500m2 of StoVentec R ventilated rainscreen cladding, and finished with Sto Lotusan external render.
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MAPLEFIELDS SCHOOL

MAPLEFIELDS SCHOOL

Tata Steel

With RoofDek as the structural deck, the school’s roofs feature rainwater harvesting, high levels of thermal insulation, natural ventilation, green sedum roofs and solar thermal panels.
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Abinger Road

Abinger Road

Next Generation Rooflights

Maximising light to a bespoke side extensionThe ChallengeThe homeowner did not want to forsake garden space but desired to add more functional space to their family home in suburban London. As part of a charming street of semi-detached properties clever design and effective use of glazing enabled the limited space between the property and their neighbour’s property was utilised.The SolutionA bespoke side extension was created and in addition maximising natural sunlight a bespoke fixed ‘L’ shaped multi-panel rooflight was combined and multi-panel rooflights and electric opening vent which allowed for the new space to receive additional natural ventilation.These glazing solutions meant that the homeowner was able to maximise the natural light and natural ventilation available to them whilst undertaking building work that had a minimum impact on their home. Get in touchWhether you’re at planning or construction stage why not see how we could help you add natural light, ventilation and space to your home; you can call us on 01223 792244 or pop us an email via info@nextgenrooflights.co.uk outlining what help you need.
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Bespoke Glazed Sliding Roof Hatch - Great Portland Street, London

Bespoke Glazed Sliding Roof Hatch - Great Portland Street, London

Surespan

ProjectSurespan designed and manufactured these huge electrically operated sliding glazed roof hatches also provide free airflow of 7m² for smoke ventilation!These bespoke designs were part of a redevelopment on Great Portland Street in London. The covers were 4610 x 1955mm and featured an electrically driven opening motor.Product: The covers provide 7m² free airflows (As it is sliding there are no obstructions to the ventilation) according to approved document B (fire safety) paragraph 5b diagrams C.7.The glazing features laminated and heat-strengthened low iron glass to L40.A further fixed rooflight was also supplied to the size of 4935mm x 1955mm, the thermally broken multi-pane rooflight provides natural daylight
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Sliding Glazed Roof Hatches - Great Portland Street, London

Sliding Glazed Roof Hatches - Great Portland Street, London

Surespan

Project: Surespan designed and manufactured these huge electrically operated sliding glazed roof hatches also provide free airflow of 7m² for smoke ventilation!These bespoke designs were part of a redevelopment on Great Portland Street in London. The covers were 4610 x 1955mm and featured an electrically driven opening motor.Product:The covers provide 7m² free airflow (As it is sliding there are no obstructions to the ventilation) according to approved document B (fire safety) paragraph 5b diagrams C.7.The glazing features laminated and heat-strengthened low iron glass to L40.A further fixed rooflight was also supplied to the size of 4935mm x 1955mm, the thermally broken multi-pane rooflight provides natural daylight
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Chettles Yard

Chettles Yard

SE Controls

SE Controls' brief was to supply, install and project manage a full turnkey solution to meet the fire safety and smoke ventilation needs in three of the new buildings at the Nottingham Chettles Yard student housing development.
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Crittall Windows hit thermal targets at World Heritage site

Crittall Windows hit thermal targets at World Heritage site

Crittall Windows Ltd

Crittall Corporate W20 windows are an important component in the refurbishment and upgrade of a prominent industrial site in historic Bath.Newark Works is recognised as a masterclass in the retrofitting of heritage buildings that has transformed a former riverside heavy engineering factory into 21st century workspace.The buildings, dating from 1857 to 1905, are Grade II listed and sit within Bath’s designated World Heritage Site. They were formerly the home of world-renowned crane makers Stothert & Pitt but had fallen into serious disrepair. Their location as part of a larger Bath Quays redevelopment spurred their re-use, underpinned by sensitive treatment, to create 40,000sq.ft of modern workspace.“We specified the Crittall W20 system to replace the existing, single-glazed, cast-iron framed windows that were at the end of their life and deemed beyond repair,” said Nick Brown, Director of Ferguson Mann Architects.He explained: “The Crittall W20 system was chosen due to the need to use a window system that could sympathetically reproduce the fenestration of the large industrial windows – many of which were 3.6m tall – but also provide a huge thermal improvement.”  It was recognised that retaining the original cast iron windows and introducing secondary glazing was neither economically viable nor appropriate aesthetically.“The slim profiles of the Crittall W20 system meant we didn’t have to compromise on the amazing amount of natural light coming into the interior whilst improving the air tightness and reducing the overall heat loss of the building through the windows,” said Brown.He added: “Crittall were also able to recreate the opening vent arrangement of the existing windows, meaning we could also improve the natural ventilation provision to the new workspaces.”Consulting engineers Buro Happold calculated that just replacing the existing single-glazed windows with new double-glazed alternatives with a U-value of 1.8W/m2K would result in a 16 percent annual energy saving. That translated to 21.4 tonnes of CO₂. Over the building’s lifespan of, say, 25 years, that equated to a 535-tonne reduction in CO₂ emissions.In view of the heritage credentials of the buildings, planners and conservation officers at Bath & North East Somerset Council were consulted on the desire to replace the original fenestration with like-for-like steel windows. The local authority was keen that the buildings should be brought back into use after several previous failed attempts. They wanted the site’s historic significance to be respected while avoiding the desire to turn Newark Works into a ‘museum piece’. The installation of Crittall W20 was approved and two of the original cast-iron windows have been retained and refurbished as a reminder of the original building but not in a way so as to compromise the improved thermal performance of the whole.Summing up, Nick Brown comments: “Everyone is really pleased with the final result.”
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Clifton Cathedral

Clifton Cathedral

Nicholson STS Ltd

Working with Purcell, the project architects, and William Anelay, Nicholson is providing the stainless steel AIRTRAK® ventilation profiles. Many of these profiles are being manufactured to bespoke angles and dimensions for each particular situation in which they are being utilised.
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Salamander Street, Edinburgh

Salamander Street, Edinburgh

Knauf Insulation Ltd

Salamander Street is a mid-market rent initiative that provides high quality affordable homes in the heart of Leith, Edinburgh. It comprises 199 flats and maisonettes across six storeys of accommodation, constructed over a basement car park.It was designed by 7N Architects, which specified Knauf Insulation’s 50mm Rocksilk® RainScreen Slab to insulate the ventilated façade. They chose this product because it met the brief’s two critical performance factors: thermal performance and fire safety.It is a Rock Mineral Wool insulation slab with a thermal conductivity of 0.034W/mK, so it delivers the required U-value of 0.16 W/m2K. It is non-combustible with the best possible Euroclass A1 reaction to fire classification and is BBA certified for use in a wide range of build-ups in high rise buildings. This means it complies with Building Regulations in Scotland that restrict the use of combustible materials on most buildings over 11m.The Salamander Street development was overseen by main contractor Cruden Building East with sub-contractor Soundtex responsible for installing the insulation.It was constructed using an Ancon Brick Restraint System. Ancon has undertaken independent third-party tests to demonstrate that its restraint system does not require a compression sleeve when used in conjunction with Rocksilk® RainScreen Slab under 180mm thick. This provided a huge saving in labour costs for Soundtex as fasteners are usually inserted into compression sleeves by hand.Throughout the build, Knauf Insulation’s Specification Team attended regular project meetings and conducted site visits to check the quality and progress of installation. Rocksilk® RainScreen Slab is optimised for ease of installation and improved robustness, making it easy to manoeuvre into position. At Salamander Street, the Specification Team noted the uniformity of installation and perfectly staggered joints. This is important because it ensures there are no gaps, which could reduce thermal and acoustic performance – a common issue with rigid foam board insulation.Rocksilk® RainScreen Slab is manufactured with ECOSE® Technology, Knauf Insulation's unique bio-based binder that contains no added formaldehyde or phenol. It is made from natural raw materials that are rapidly renewable and is 70% less energy-intensive to manufacture than traditional binders, so it is more environmentally friendly.Products made with ECOSE® Technology are soft to touch and easy to handle. They generate low levels of dust and VOCs and have been awarded the Eurofins Gold Certificate for Indoor Air Comfort.The Rocksilk® RainScreen Slab insulation was installed in conjunction with Knauf Windliner sheathing board for maximum performance.Thanks to Knauf Insulation, the residents of Salamander Street will enjoy warm, cosy homes that meet the highest standards of fire safety.
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Dagenham Flats

Dagenham Flats

Sertus

United Living approached Sertus to supply automatic smoke ventilation products for all seven blocks, to keep fire escape routes via stairwells and communal corridors free from smoke in the event of a fire.Project Name: Dagenham FlatsLocation: East LondonSector: ResidentialClient: London Borough of Barking & DagenhamInitial BriefUnited Living is one of the UK’s leading providers of refurbished and new build dwellings. The company was tasked with the refurbishment of seven apartment blocks in the London borough of Dagenham and Barking. As multi-storey blocks occupied by demographically-diverse residents, including families and the elderly, the requirement for safe escape routes in the event of a fire was clear; and the existing ventilation within this 1970's building had been identified as less than optimal.Sertus' Façade Louvre Blade (Glass) vents were used in this project. View the product here.OutcomeThe addition of windows has improved overall quality of life in the building by introducing more natural light, increasing ventilation and comfort, and reducing the energy costs associated with both.Fitting into the existing window frames and supplied with full wiring schematics, the window vents proved simple and speedy to install, which kept costs down and reduced disruption for residents during the scheme of works. All products are certified to residential building regulations, including EN12101-2, delivering total peace of mind for client, contractor and residents alike.
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Deansgate Square

Deansgate Square

SE Controls

Deansgate Square, one of Manchester’s highest profile city centre residential developments, is using mechanical smoke control and ventilation solutions from SE Controls to protect residents by keeping corridors, stairwells and escapes routes clear of smoke, should an apartment fire occur.
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Agrivaal

Agrivaal

SE Controls

The new energy efficient Agrivaal building in Pretoria’s Tshwane Central Business District is using advanced natural ventilation and smoke control solutions from SE Controls Africa to maintain a comfortable indoor environment while improving safety by ensuring escape routes are smoke free in the event of a fire.
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Britmet Lightweight Roofing: LiteSlate Residential Roof Renovation

Britmet Lightweight Roofing: LiteSlate Residential Roof Renovation

Britmet Lightweight Roofing

This case study focuses on the successful implementation of Britmet's Structural Conversion System, BritFrame, and composite slate tile, Liteslate, installed by ART Contracts LTD in a residential flat roof renovation project near Llangollen. The existing roof had been plagued by ponding and water ingress, necessitating repeated repairs and replacements over 20 years. This case study explores the benefits, challenges, and outcomes of utilizing the Britframe and Liteslate, providing a long-lasting and aesthetically pleasing solution. Residential flat roofs are susceptible to issues such as ponding water, water ingress and yearly inspections, which can lead to recurrent maintenance and repair requirements. This case study showcases the utilisation of Britmet Lightweight Roofing's Britframe Structural Conversion System and Liteslate to overcome these challenges and deliver a durable, low-maintenance roofing solution. Britframe is a versatile and innovative solution designed to convert flat roofs into pitched roofs, providing improved water runoff and a new more aesthetically pleasing finish, and reduced risk of ponding water and improved thermal performance. This can be covered using a variety of different roofing materials, and Liteslate, a lightweight synthetic slate roofing slate, was specified due to its excellent weather resistance, durability, and aesthetically appealing finish. Llangollen is part of the UNESCO World Heritage Site along eleven miles of canal from Gledrid to the Horseshoe Falls and required a durable yet authentic roofing solution.The project involved the renovation of a residential flat roof that had undergone multiple repairs and replacements over 20 years due to ponding and water ingress, and constant maintenance. ART Contracts LTD was tasked with implementing and installing LiteSlate to resolve recurring issues.The Britframe System converted the existing flat roof into a pitched roof, enabling efficient water runoff and preventing ponding, thereby eliminating the risk of water ingress, and reducing the need for yearly inspections and constant maintenance to site, Britmet’s Liteslate offered excellent weather resistance and durability, reducing the need for frequent repairs and replacements while offering an attractive finish replicating the appearance of natural slate. Overall offering the advantages of lightweight construction and ease of installation.Conducting a thorough structural assessment of the existing flat roof to ensure compatibility and feasibility of the Britframe required careful analysis and engineering expertise. Coordinating the installation of the Britframe and Liteslate with existing roof features, such as skylights or ventilation systems, posed challenges in achieving a seamless integration.The implementation of Britframe has effectively addressed the issue of ponding, providing efficient water runoff and preventing water ingress into the residential property. The utilisation of Liteslate offered exceptional durability, weather resistance, and longevity, significantly reducing the need for future repairs and replacements, and thereby providing long-term cost savings. Liteslate also improved the overall aesthetic appeal of the residential property, replicating the natural beauty of slate roofing while offering the advantages of lightweight construction. The integration of the Britmet Lightweight Britframe System and Liteslate successfully addressed the challenges the building was facing. The project resulted in improved water runoff, enhanced durability, a more aesthetically pleasing roofing solution, along with a new 60+ year life expectancy. This case study emphasizes the importance of selecting innovative and reliable roofing systems to overcome recurring roofing issues and deliver long-lasting and visually appealing outcomes.
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Round rooflights give Milton Keynes University Hospital a new dimension

Round rooflights give Milton Keynes University Hospital a new dimension

Lamilux Rooflights Ltd

All LAMILUX rooflights are available in circular shape, too, with diameter sizes ranging from 60 mm to up to 180 cm. In the beautiful new University Hospital building in Milton Keynes, our Glass Skylight FE Circular rooflights create an eye-catching design element, while providing natural daylight and ventilation.
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Sevenoaks School Science & Technology Block

Sevenoaks School Science & Technology Block

Schueco UK Ltd

Sevenoaks School’s Science & Technology Centre, designed by Tim Ronalds Architects, brings together a diverse set of disciplines and “puts learning, education and experimentation on display”. Daylit and naturally ventilated throughout, the £23m development has a robust interior of expressive structure, evident construction and natural materials, yet feels highly transparent, with views to the landscape and beyond.
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A3 New Bailey, Manchester

A3 New Bailey, Manchester

Knauf Insulation Ltd

When completed, A3 New Bailey in Manchester will be one of Europe’s greenest buildings. Not only has it been designed to achieve the toughest sustainability ratings, it will also feature Europe’s largest living wall. But as with any innovative project, it presented some major challenges when it came to the specification of the rainscreen façade system. Meeting the target U-value Lester Cladding NW Ltd were responsible for the design and build of the façade. A rock mineral wool product with a thermal conductivity of 0.035 W/mK had been specified. But when conducting the calculations, they instantly ran into a problem. An insulation depth of 240mm was required to achieve the U-value of 0.15W/m2K.  Jamie Simm, Operations Director at Lester Cladding NW Ltd explained: “There was a strict external and internal boundary, so we needed to keep the façade wall build-up within those measurements. But the amount of insulation needed to meet the target U-value increased the depth of the wall, pushing it over the boundary line.” When looking for an alternative solution, the company approached Knauf Insulation’s Project Specification Team to discuss the brief. As well as meeting the thermal performance requirement, the insulation needed to comply with building regulations that ban the use of combustible materials in the external walls of certain buildings over 18m tall. It also needed to help reduce noise and meet the project’s sustainability targets.  After running 3D U-value calculations, Knauf Insulation’s Technical Support Team recommended 170mm Rocksilk® RainScreen Slab for the ventilated façade, a rock mineral wool insulation which has a thermal conductivity of 0.034 W/mK. For the Steel Frame System (SFS), they recommended 150mm OmniFit® Slab 35, a glass mineral wool insulation with a thermal conductivity of 0.035 W/mK.  This combination reduced the thickness of the wall build-up by a significant 70mm, ensuring the U-value could be met within the required parameter for the wall build-up. Simms said: “Not only did Rocksilk® RainScreen Slab offer superior U-value performance for a slimmer profile, it reduced costs across the whole build. As well as reducing the quantity of insulation required, we could use smaller helping hand brackets and thinner fire barriers for example. It was the product that steered the job through.” In addition to achieving the required thermal performance, both products are non-combustible with a Euroclass A1 reaction to fire classification. This means they will not add to the development or spread of fire, so comply with the building regulations. Rocksilk® RainScreen Slab is also British Board of Agrément (BBA) certified for use in buildings of any height and for the broadest range of thicknesses and build-ups of any rainscreen solution on the market. Mineral wool also has an open fibre matrix, which means it has sound absorbent properties. The insulation will help to reduce noise from the busy city centre location and from disturbing residents. Project complexity The choice of insulation was not the only challenge for the build. There is no template for supporting Europe’s biggest living wall. So, Lester Cladding NW Ltd needed to draw on their own extensive knowledge and expertise, as well as that of the whole supply chain to create a bespoke solution from the ground up.   One problem with this approach, was that every potential solution impacted another aspect of the façade build-up. To overcome this, Lester Cladding NW Ltd took the unusual step of arranging a meeting between representatives from eight different design and manufacturing partners. Together they discussed the whole system ‘screw by screw’.  “Getting everyone sitting around the table meant that all our manufacturing and design partners were completely engaged. They understood what we were trying to achieve, and all worked together to find the best solution.” There was one particular factor that could affect the insulation – water. While a living wall utilises planting schemes that thrive in drier conditions, a 4,000m2 living façade still requires a lot of watering – something that could introduce lots of extra moisture into the system. Knauf Insulation’s Rocksilk® RainScreen Slab has a water-repellent additive that promotes water run-off and ensures the slab will maintain its integrity. A traditional façade system prevents the insulation from getting saturated by rainwater, while the ventilation reduces the build-up of condensation and allows the insulation to dry out if it does get wet.  However, the water-repellent additive does not make the insulation waterproof, so it needed protection from the constant flow of water from the irrigation system. As a result, an additional breather membrane was installed to prevent moisture from penetrating the façade system and affecting the insulation. Sustainability A3 New Bailey has been designed to UKGBC’s Net Zero Carbon Framework and WELL Building Standard principles, as well as to achieve BREEAM Outstanding and Wired Score Platinum ratings. This meant the sustainability of the construction materials themselves was also important.  Here Knauf Insulation’s products ticked all the boxes too. Its glass and rock mineral wool insulation are made from materials that come from either naturally abundant sources or are recycled. For example, its glass mineral wool is made with upto 80% recycled glass from locally collected and processed household bottles and jars. Glass mineral wool has the lowest levels of embodied carbon of any mainstream insulation material. So, combining the use of both Knauf Insulation glass and rock mineral wool meant that the insulation solution for A3 New Bailey had less embodied carbon than a traditional all-rock insulation solution. Both products are also manufactured with ECOSE® Technology, Knauf Insulation's unique bio-based binder that contains no added formaldehyde or phenol. ECOSE® Technology is made from natural raw materials that are rapidly renewable and is 70% less energy-intensive to manufacture than a traditional binder. They also generate low levels of dust and VOCs and have been awarded the Eurofins Gold Certificate for Indoor Air Comfort. This contributes to the health of both installers and residents. Its entire glass mineral wool product range is also Declare Red List Free, which means that it does not contain any harmful chemicals on the ‘Red List’.  Thanks to Knauf Insulation’s advice, technical support and high-performance insulation solutions, Lester Cladding NW Ltd was able to deliver the rainscreen façade for A3 New Bailey – and with it, Europe’s largest living wall.
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28,000mm2 Free Area

28,000mm2 Free Area

Cast Iron Air Brick Company

Our newest designed cast iron 225x225 air brick allows for an unprecedented free area of 28,000mm2. It is known as the MAX9 air brick and has recently been cast in Oxfordshire, near Cotswolds and is ideally suited to period properties looking for enhanced ventilation. Existing customers include Prime Minister Cameron for installation in Chequers as well as Jesus College Cambridge
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LANAI - VELVET - Pivot and Retract - Louvred Canopy

LANAI - VELVET - Pivot and Retract - Louvred Canopy

Lanai Outdoor

A beautiful example of the Lanai -VELVET - The flagship Louvered canopy model in our range. This aluminium bioclimatic pergola not only has pivoting blades to regulate light and ventilation but also retracts to open up your outdoor space to the sky above.Featuring retractable zip screens and frameless sliding glass doors this truly is a breath-taking space for all seasons.
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Welsh Slate wins Westminster’s vote

Welsh Slate wins Westminster’s vote

Welsh Slate

Two types of Welsh Slate feature on the new roof of London’s Irish Embassy. The £2.5 million re-roof of the Grade II listed Irish Embassy in London, with more than 10,000 Penrhyn Heather Blue slates from Welsh Slate, has required its own exceptional levels of diplomacy. DarntonB3 Architecture had multiple challenges to factor in when it came to specifying the replacement slates, including the City of Westminster’s planning department, which was keen to see as many of the existing slates re-used as possible and required convincing to embrace the “new” metric sizes. Then there were landlords Grosvenor Estates, leaseholders the Department of Foreign Affairs and Trade, and Historic England, not to mention the site being opposite Buckingham Palace, on a “Red route” with diplomatic bays nearby, and between two of the most important Conservation Areas of Belgravia. Work began on the landlocked Grosvenor Place site in March 2018, a year after DarntonB3, who are specialist conservation architects, were appointed to oversee the project, and has just completed (January 2019). Two types of Welsh slates have been used on the former terraced town mansion with decorative metal roof crest that was designed by architect Thomas Cundy, who was surveyor to the Grosvenor Estate at the time, and built in 1868 in a French Renaissance style. Roofing contractor Mundy Roofing was involved at an early stage in the project and were ultimately appointed as principal contractor. Specialising in leadwork and natural slate roofing, they were pivotal to the project’s success. A total of 600m2 of County-grade 500mm x 300mm slates have been used on the numerous standard 30° to 35° pitched roofs while Capital-grade bespoke arrow-head slates of the same colour but sized at 400mm x 250mm were used around dormer windows on the 80° mansard roof elements that are reminiscent of Paris and feature lead secret gutter detailing around the perimeter. There is also some vertical slating to the rear elevation.  The old 5mm to 7mm thick slates had been on the roof since it was first built 150 years ago. The rectangular ones had been slightly longer and narrower, at 510mm x 255mm, while the arrow-head slates had been smaller all round, at 350mm x 200mm.  But a roof survey showed they were not laid to the correct bond or headlaps and fixing points were far from ideal and non-existent in places (the headlaps between 0 and 50mm), leading to the hardened sarking underneath becoming sodden in places. In fact, most of the roof had been repaired over the years with different types of slates using temporary lead tags or painted with a bitumen solution in an attempt to prolong its life. DarntonB3 argued that if the roof was re-installed as existing, its appearance would alter as they would have no option but to lay the slates at the correct headlap which would create additional courses. In addition, using the slightly larger arrow-head slates for the mansard roof would enable them to form a more robust detail at the abutments to the dormers and party wall.  Home to the Irish Embassy for the past 70 years, the building comprises office and entertainment space. The traditional timber truss roof featured timber sarking boards with penny gaps, a form of construction usually found in Scotland. The slates were then fixed with copper nails directly to the boarding without any timber battens. Once city planners had agreed to 100% replacement of the Welsh slates, at the new metric sizes (a process that took a year), the addition of timber counter battens, to improve ventilation of the roof and prolong the life of the new slates, was also proposed by the Architects. Mundy Roofing produced sample comparison mock-ups to demonstrate to the conservation officer this change would not be detrimental to the building’s character. As it is, the interface details where slates have been lifted has not altered the character of the building and the introduction of battens would not be known by the general observer.  DarntonB3 senior associate Matthew Jones, who was project manager and lead architect throughout, said: “Westminster City Council are regarded as one of the leading conservation-led councils in the UK, with some of the highest standards and criteria to meet, and dialogue with the conservation officer was detailed and robust. The need for wholesale replacement of the existing slate due to them being at the end of their life was a delicate decision and sufficient evidence of this necessity was proven. The replacement of the slates with metric sizes was also an extensively discussed item but the principal contractor and Welsh Slate worked with us to develop the narrative.” Keith Hamilton, an architect accredited in building conservation, acting for DarntonB3 alongside Matthew was reasonably sure Welsh slates had been used previously but was keen to ensure the correct thickness and grading were eventually used throughout the renewal process.  He said “We have specified Welsh Slate on numerous other projects and their reputation for the highest quality precedes them. We were able to argue the merits of increased ventilation behind the slates using cross battening in lieu of direct nailing to the existing sarking board, which in the majority of areas had survived over 150 years’ performance. “The risk of lack of ventilation on the lower roof pitches behind the slates was particularly relevant at the eaves and head. We had previously considered introducing slate vents and felt underlay to augment any need for ventilation but the existence of the ‘penny gaps’ in the sarking boards encouraged us, to believe that this was not required.  “This was another point of continued discussion with the conservation officer who was against an underlay in this instance. The timber sarking was found to be in remarkable condition considering the lack of existing underlay and the direct fix of the slates, highlighting the quality of the original slates. Hence, there is no secondary layer apart from the slating itself and we trust the quality of the new Welsh slate will replicate the existing quality and last another 100 years.” Due to tight access on the roof, they were also able to widen the lead gutters and set back the lower courses of slates to avoid getting them broken. All the new Penrhyn slates were holed and traditionally fixed with 38mm copper nails as opposed to clipped or other methods. The standard-size slates were able to cope with the wide variation of roof pitches and new rooflights encountered by varying the lap and gauge slightly. In virtually every case, the slate junctions are with lead or copper flashings and as it was appreciated there is some risk of staining, all lead was treated with patination oil. Using new treated timber battens for fixing the new slates proved a great success as direct fixing into the old hardened sarking boarding would have been a major problem and time consuming.  Matthew said the support they had received from Welsh Slate had been “fantastic” and included a site visit to match the type of slate, a letter explaining the need to change from imperial to metric sizing, technical drawings of the arrow-head slates, technical information on the end life of slates and their unsuitability for re-use, on-time deliveries with little if no wastage, and recommending experienced slating contractors. Mundy Roofing were on site for a total of 10 months. Work included the rebuilding of three chimney stacks, involving 30 tonnes of stone and brickwork, and restoration of traditionally-forged wrought ironwork to the pavilion roof crest, all underneath a temporary roof. Russell Mundy said: “This project was extremely challenging due to it being a working embassy but Welsh Slate were excellent with their support in achieving planning consent and the product has received widespread praise from the client.” Matthew said: “Due to the extremely difficult access to this roof, we were conscious to use a slate that will require little maintenance (if any) and satisfy appearance for an extended period of time. Welsh Slate were able to provide technical studies comparing different types of slate and their longevity. This enabled the landlord, Grosvenor Estates, that the new roof should outlast the previous roof and match it entirely with other buildings nearby. Welsh Slate’s evidence on the existing slates being at the end of their useful life, and the lifecycle information of the new slates, helped give the conservation officer comfort that the right approach was being taken for the building.” Keith added: “Essentially, Welsh Slate ensured we got the right slate, quality, consistency and sizes for the varying roof pitches and conditions. There have been no problems with mixing batches or colour variations which can occur. They also met the stringent programme requirements, reducing risks of delay from the main contractor. To our knowledge, there have been no rejects on quality of slates. “The final result is the new slating looks exactly like it was envisaged in 1868, except with the knowledge it is better-fixed and easier to reach for maintenance, with a discreet fall arrest system fitted. The client is extremely happy with the quality of the final works.” Andrea Fox, senior architect with the property management unit of the Department of Foreign Affairs and Trade, said: “The team have provided us with an exceptional and beautiful project that we know will stand the test of time and one we are extremely proud to have commissioned.” “I want to thank the Welsh Slate team for the support they provided during our project and especially in relation to protracted issues relating to the listed building consent approval.” 
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Crimple Hall, Harrogate

Crimple Hall, Harrogate

Tobermore

The Challenge Modern paving was required for a contemporary farmer market and restaurant  Crimple Garden Centre in Harrogate has increased its retail offering to include a food hall, restaurant, gift shop and art gallery. The vision for the new building was to provide an open plan artisan style farmer market and restaurant that comfortably coexists with the existing garden centre.  The modern building form was driven by its highly sustainable design with natural ventilation, northlights and its saw-tooth style roof adding originality to the scheme. A key point when designing the area was the importance of creating an identity which relates to the adjacent garden centre but gives distinction to the new offering.  A visually appealing external area was important to attract customers into the farmers market and garden centre. Modern paving that could withstand significant footfall was required to complement the contemporary aesthetic of the new market.  The Solution Artro linear paving harmonises the styling, lines and tones of the new building  Tobermore worked closely with the project team to ensure design aspirations were met. Crimple required a unique external area to align with the quirky finish of the new artisan style farmer market and restaurant. Tobermore’s Artro linear block paving was the perfect hard landscaping solution for the main entrance area.  Artro’s strength lies in its ability to adapt its look depending on the colour and laying pattern used. A unique look was created using a mix of two cool grey tones. A high percentage of the lighter Platinum was combined with a low percentage of the darker Carbon. Artro’s stretcher bond orientation naturally guides customers inside the Crimple building. The linear paving blocks offer a modern, hard-wearing surface that will withstand significant footfall and vehicle trafficking, if required. With accessibility in mind, Artro provides confidence with a low slip/skid surface in all-weather conditions. The smooth surface finish is suitable for prams and wheelchair users.  A featured walkway from the front row parking bays to the main entrance was created using Tobermore’s Mayfair Flags. The silver slabs feature sparkling natural granite aggregates that add to the scheme’s contemporary aesthetic. As sustainability was a key consideration of the project, Tobermore’s permeable paving option Hydropave Tegula Duo was chosen with its ability to function as a SuDS paving system. Laid in the warm shade Bracken, the contrast between the paving products helped to zone the pedestrian areas.   Tobermore’s granite aggregate Fusion Edge added the finishing touch to the project with its modern aesthetic.    

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