"rainwater goods roof drainage systems"

The project took place across a 21 m2 double garage roof that required updating and maintenance work as it had simply been left to the elements and was no longer fit for purpose.  Rob Rough, Director of PPM Care Ltd stated Degaflex that he was “really pleased with the outcome and impressed with how easy it is to install Degaflex” he went on to add that he would have traditionally used GRP, however, he will be “using Degaflex going-forwards”.

Topseal PU was specified over numerous roofs on this hospital covering 1000's of metres. Topseal PU was chosen due to its BBA certification, high performance, 25 year guarantee, low odour together with the failed asphalt roofs and amount of plant on the roof it was the perfect product.

Established in 1992, University Hospitals Coventry and Warwickshire NHS Trust is one of the UK’s largest teaching Trusts and are responsible for managing two major hospitals in Coventry and Rugby, which serve a population of over a million people.Along with the healthcare of the local population, the Trust is responsible for the maintenance and upkeep of the buildings and land, which has included a new 1,600-spce car park at the University Hospital in Coventry, which has featured on the BBC’s Hospital show recently.

Integrated Alumasc Water Management Solutions specified on new mixed-use development.The site of a derelict petrol station located in the historical town of Hemel Hempstead has recently been transformed into a new retail and residential development.Bovingdon High Street now features eight brand new apartments and a new Tesco express outlet, bringing new life into the once disused space near the town centre.The unique design of the site coupled with the number of dwellings planned, saw a number of challenging design factors for the project, including curved roofs and the need for soffits within a confined space.This is where Alumasc Water Management Solutions (AWMS) come into their own, offering a complete solution. An integrated Skyline and Rainwater offering was specified across the development, including Skyline’s bespoke aluminium fascia, soffits & copings. AX moulded extruded gutter systems with combined Swaged downpipes where also part of the final specification. All finished in a BBA approved, polyester powder coated finish, the final look achieved demonstrates understated quality, in dusty grey colour (RAL 7037) specifically to match the windows and balconies on the project.“Thankfully we were consulted early in the project, which is where we are most effective,” commented John Hemphill, Skyline Technical Sales Manager, who worked on the project.“We had a number of site meetings, which resulted in designing and submitting CAD and 3D drawings in order to ensure the project was delivered on time.”

We have improved the drainage system at this lorry park and service station in this town to the north of London.  The problem was that the drainage system installed in the area did not have sufficient capacity to drain the rainwater, leading to dangerous accumulations of water on the road surface.Service stations and lorry parks have a constant flow of vehicles. There are also some areas where HGVs turn, making it necessary to guarantee the safety of the installation of the channels in order to prevent breakages and accidents.Good advice on your drainage system avoids problems and gives you peace of mind.In these cases, it is essential to have a consultancy service that, taking into account all the necessary parameters (location, rainfall, surface slope, weight to be borne by the grating (load type) and length of the drainage line), defines the model best suited to the site.In this project, 250 ml of Civil-F polymer concrete channels, model F150K, were installed for load type F900. And it has a grating secured at 8 points. It is important for you to know this.

This is an asbestos cement roof coating and refurbishment project completed by Liquasil Approved Installers, Nadco Ltd. The roof was first cleaned and all cracks, small holes and fixings sealed with Liquasil Non-Sag Sealer, providing a permanent seal. The entire roof surface was then coated with the BBA Approved Asbestsoeal 20 asbestos roof coating system.

No timber was allowed as part of the new refurb to conform to FM Global (Airbus Insurers) regarding system fire rating. IKO recommended an overlay on the existing deck, which complied with all the latest British Standards and Regulations. IKO Mach One System was chosen as it provided a flame-free System. Where detailing was difficult IKO Polimar EC/UV System was used. The roof refurbishment also included the installation of smoke vents, associated smoke control panels and accessories.

Topseal PU was installed on this failed felt roof on this hotel. Due to it being a hotel, it had to remain open throughout the contract without disruptions.

This doughnut shaped roof was a challenge due to its shape, but due to the versatility of Topseal GRP all of these obstacles were overcome with outstanding results.

This project involved a brand new Starbucks drive-thru being built in West London where the customer wanted the overlooked rooftop to be green. The customer was able to give the basic dimensions to our team and describe how they wanted the roof laid out. We then calculated the exact quantity of units needed with our inhouse software and gave delivery and installation guidance to the contractor and end client. Wallbarn also supplied the materials for the semi-extensive border including geotextile fleece, drainage board and our specially-developed substrate for a comprehensive green roof solution,

Creating Paradise: Alumasc Delivers for the Complete Building Envelope for One Chamberlain Square Paradise Project One Chamberlain Square is the lead project in a wider vision to create Paradise in Birmingham—the most important development the city has seen in a generation. With the help of Alumasc offering solutions for the entire building envelope, One Chamberlain Square is set to be a vibrant mixed use development that will not only be the new home of professional services firm PwC, but will endeavour to maintain a balance between busy urban hub and the natural world. To do this, Alumasc provided a range of products and services encompassing the entire building envelope, specified by Weedon Architects. This included a Blackdown Extensive Brown Roof, applied over Hydrotech Hot Melt Waterproofing, alongside Harmer Roof Outlets and bespoke solutions from Roof-Pro, for building D: an eight-story commercial building over a podium car park. Inside, bespoke blinds by Levolux, also an Alumasc company, were installed. “This is an extremely high-profile development, which demanded trusted, standard setting products,” said Owen Doherty, Director at Weedon Architects and Project Architect for the venture. “All systems decided on were chosen on quality, durability and enhanced design life compared to competition.” ON THE ROOF OF PARADISEBlackdown’s Extensive Brown Roof is a green roof in the making. Covering approximately 4000m2 of roof space for this project, One Chamberlain’s ‘brown’ roof is installed without plant life and will naturally seed from plant material that either blows in from the local environment or that is introduced by birds. In this way, it literally replaces the green space that has been taken up by the construction of the building it lies on, encouraging biodiversity by providing and strengthening habitats for wildlife local to the area, with truly local plant life. Typically, the substrate is mounded to offer habitat variation, therefore the depth of the brown roof can vary be between 92-170mm and have a saturated weight of approximately 113-213kg per square metre, depending on the depths of the substrate. Beneath this, Hydrotech MM6125 roofing, a hot melt rubber bitumen membrane, delivers sound structural waterproofing. The bitumen is heated and combined with a polyester reinforcement and protection sheet to form a weatherproof layer that has a 100% bond to prepared concrete surfaces. With no product failures in over 50 years, Hydrotech Hot Melt roofing is guaranteed for waterproofing integrity for the lifetime of the structure. Working in tandem with each other, the Blackdown Extensive Brown Roof helps to extend and reinforce the life and guarantee of the waterproofing, offering a protective layer of natural insulation. Giving his seal of approval, Owen said: “I only specify Alumasc hot melt at the moment and have done for many years. All products and systems chosen here have had zero product failures and I have never had any issues with technical specifications on previous high-profile buildings.”PROVIDING EFFICIENT DRAINAGEGiven the huge expanse of roof space involved this project, effective flat roof drainage was essential. Harmer AV high capacity aluminium roof outlets were installed for this purpose. Suitable for all regular flat roofing applications with continuous membranes, these outlets are lightweight, durable, non-corrodible and have been proven to drain 40% more roof area than conventional gravity outlets, therefore further ensuring the long life and service of other flat roof systems. Aiding project completion, Roof-Pro support systems were also tailored bespoke to meet the roof structure requirements. Free-standing support and access solutions were devised that would allow work to be carried out safely, efficiently and without causing damage to any of the roofing systems being installed. A WORD FROM THE CONTRACTORChristian Bradley of Briggs Amasco, who installed the roofing, commented: “One Chamberlain Square and the surrounding podium waterproofing form part of the largest construction programme in Birmingham. We are extremely proud to be working on this landmark project. “The products and systems installed all have long legacies of successful projects behind them, and there are no better guarantees than real results. They also offer excellent value for a competitive cost. These are just a few of the reasons why we love working on Alumasc projects. Alumasc offer a single source for all solutions, bespoke design detailing and the technical support is always on-hand when you need it.” Completed in autumn 2019, One Chamberlain Square forms an integral part of a masterplan redevelopment that will transform part of Birmingham City Centre.

We worked with specialist Mezzanine Floor supplier WSL to provide a Mezz Pro (500kg) goods lift to help Rockshop Wholesale to move heavy bags of semi-precious gemstones safely between floors. Like many businesses, Rockshop Wholesale was growing, importing more semi-precious gemstones from around the globe to meet the demand of its customers. The solution: a mezzanine floor, providing more space by adding a second floor and avoiding the costly requirement to move premises. They needed a safe and efficient way of moving heavy goods between floors. The MezzPro 500kg goods lift was the perfect solution

Made to exacting standards, Penny Hydraulics Goods Lifts are the product of a complete end to end service – including design, manufacture, and installation – all done at our own purpose-built premises, here in the UK. We also offer comprehensive product training and maintenance carried out by a member of the Penny Hydraulics team.

The Gloucester Gateway M5 motorway services created a new sustainable standard in an area of outstanding natural beauty. The structures are built into the undulating hills softened with organic forms and green roofs. An ambitious landscaping solution required ACO to create a Sustainable Drainage System controlling rainwater run-off, while providing a high-quality habitat for wildlife to flourish.

At the start of 2012 Penny Hydraulics Ltd were approached by Edward Adcock, Head of Book Moving from the Bodleian Library to provide a specialist goods lift to help move large volumes of library and archive material owned by the University of Oxford from a basement stack in a building owned by the Rhodes House Trust, to ground level for transportation off-site.

Before there was an open, 4" (100mm) diameter pipe that drained water from the back of this Devon farm house into the yard. Apart from an open pipe, which never looks good on a listed building, when it rained heavily there was water gushing out across the road causing havoc to any cars parked nearby. With the installation of the cast iron cowled conservation vent now the water is deflected downwards and the opening is no longer open to the elements and in eye line. With a choice of 100mm or 125mm spigots this cowled vent has many uses

Alumasc Rooflights provided an ideal solution to allowing natural daylight into the building from above. The unique kerb design incorporates both security and waterproofing to create a reliable, safe and secure rooflight, allowing horizontal termination of the waterproof membrane. This makes water penetration virtually impossible. The domed glazing is moulded from Marlon FSX Longlife, premium quality solid polycarbonate, which has an impact resistance up to 200 times that of glass.Technically sophisticated, Harmer AV high-performance aluminium roof outlets are chosen for this project as they guarantee a trouble-free performance and are especially suited to flat roofing applications featuring continuous membranes.Harmer AV roof outlets combine innovative product design with full industry compliance to meet the needs of rainwater drainage in any construction project, with the ability to drain up to 40% more roof area than conventional gravity outlets. Further to this, their lightweight, durable, non-corrodible design means that they will do so for up to 40 years.GX Pressed Aluminium Gutters are robust box section gutters designed for traditional wet jointing on site. They’re especially suited to applications where maximum capacity gutters are required. For the very large drainage area of the campus roof, they were perfect.Designed to fully accommodate thermal movement at every joint, they are lightweight, durable and noncorrodible, and, upholding the environmental prerequisites of this project, they are 100% recyclable.Finally, Heritage Circular Pipes are available in 4 pipe diameters and 3 pipe lengths, together with a complete range of fittings. Can be factory finished to replicate cast iron or with BBA certificated powder coatings in a range of colours.

A trio of Stannah Goodsmaster CD goods-only lifts has been installed in the Yeovil branch of CLEAN Linen and Workwear. Installed over three years, each lift reflects and supports the depot’s ongoing development by lightening the growing workload.

Using materials, shades and textures that work in harmony with rural surroundings is always an important consideration for designers and planners. In Hertfordshire an ancient barn has recently been converted to provide additional accommodation for the nearby house.The new roof of the C16th barn was constructed with Cadisch Welltec perforated profiled aluminium panels over a waterproof membrane. Visible roof lights on such an ancient barn were not permitted but some light is able to penetrate through unobtrusive roof lights which are entirely covered by the perforated Welltec. The outline of the windows can just be made out in the photograph.The corrugated effect of the Welltec already lent a rustic charm to the roof and the owners needed a coating for the aluminium that would both protect the roof and also give the appearance of an old building.Taking inspiration from natural elements, EvolutionTM powder coatings allow architects and designers to achieve the look they need, together with using the most appropriate materials for the job and satisfying planning requirements on a local level.  The panels and ridge cappings totalling over 200 square metres, were pre-treated in a chrome-free system and powder coated in EvolutionTM ‘Peat fire’ at Powdertech’s Corby plant, before being delivered to site for installation. Peat fire is an earthy shade, instantly giving an aged look to the roof. It is a shade that one might expect on a weathered ‘tin roof’ – but in this case the metal stands the Evolution™ system.”  BenefitsA wide range of effects to reflect the patinas that occur naturally on metalsExcellent visual and tactile detailHigh performance weather resistanceGood edge coverageAll powders are Qualicoat 1Leaves no residue or stainTwenty-five year guarantee.

The roof to a Waitrose distribution centre has been completely refurbished in a single ply membrane system chosen for its sustainable credentials and no disruption to the retailer’s 24/7 operations at Aylesford near Maidstone, Kent. Supplied by SIG Design and Technology, 10,200m2 of IKO’s Spectraplan single ply membrane was specified for its ability to contribute to a BREEAM Very Good rating for the project which is in line with Waitrose’s mission to ‘tread lightly on the environment’.

Multi V+ drainage channels have been installed in the outside area of the Jaguar car dealership.These channels with V-shape section, provide a higher speed with lower flows, and have been developed to drain water faster, improving the self-cleaning effect of the channel. Its optimized cross section, larger than the traditional V-sections currently available on the market, provides bigger hydraulic capacity for extreme flow situations. 

SubFloor Outdoor Flooring was used to help renovate and raise a 650 m² roof into an outdoor terrace in Västerås, Sweden.This was built on top of the existing roof felt and used high-quality pressure impregnated wooden joists to create an even surface, level with the rest of the building. The joist and screw system allows for quick and easy assembly so that the floor can reach the desired height.Products:Pre-treated Wooden Joist 45x70x3600 mmSubFloor Screw 300 mmSubFloor Screw FootHeight Variation: 90 - 339 mmJoist separation: c/c 300 mmSystem Weight - c/c 300 mm: 10.72 kg/m²Materials:Pine T0-C24Fibre-reinforced polypropylenePolyamidePoint Load Limit (50 x 50 mm):Load next to screw over joist edge - 21.74 kNLoad between screws over joist edge - 16.43 kN

Bespoke twin goods lifts enhancing space and time in Holland and Barrett’s warehouse in Staffordshire, EnglandLödige Industries installs two reliable goods lifts to increase production efficiency in the warehouseHolland and Barrett’s pick, pack and dispatch warehouse in Burton upon Trent has multiple levels. Previously goods were transferred between levels with forklift trucks and pallet gates. However, the a huge spike in orders made the forklift trucks and pallet gates inefficient and impractical. In addition, the number of forklifts operating in a congested area were a cause for concern. To meet the growing demand, Lödige Industries installed two SHERPA goods lifts with multi-level and multi-directional stops, including one for a future mezzanine level yet to be installed, thus future proofing the solution. As a result, H&B has been able to support the increase in its online processes business growth by enabling a higher throughput in its warehouseby operating in an efficient warehouse. The health and wellness market leader benefits from the advantages of quick, safe and reliable SHERPA goods lifts to stock and distribute their goods when required.SHERPA goods lifts maximise storage space in the warehouseThe rising demand for Holland and Barrett’s products meant that the company needed to store and move more goods in the existing facility. The existing lifting processes via forklifts were no longer expandable. By installing twin SHERPA goods only lifts with free standing shafts, all three floors of the warehouse can now be accessed safely and efficiently. As the SHERPA can be installed into any building without any alterations such as pits, there was limited impact during construction.A potential third mezzanine level has already been taken into account and the highest level served has a lifting height of 9.05m. The lifts now enable fast transportation between all floors and open up the possibility of further storage space. Cabin size has been tailored to Holland & Barrett’s goods to ensure the most efficient transportation processes.Integrating with Holland and Barrett’s work routines to ensure uninterrupted processesThe warehouse is a fast-paced and hard-pressed working hive of activity. Avoiding any negative impact on throughput, delivery times and processes was therefore imperative. Lödige Industries team worked closely integrated with Holland and Barrett’s operations team and partners to adjust installation work to daily warehouse routines; the experienced team of engineers were able to adjust their installation to their production times. Therefore, the installation could productivelywas accomplished without impacting warehouse performance go ahead. Fast installation and delivery ensured continuous production and early gains for the customer. Despite the challenges of COVID-19 and its impact on supply chains, Lödige Industries completed the installation ahead of schedule.Enabling construction in an existing facility- a temporary scaffold meets special customer requirementsThe existing warehouse posed a few challenges in the installation of the new lifts. Many lifts require a temporary lifting beam during installation, to facilitate multiple lifting points. However, like many modern warehouses, the facility in Burton upon Trend did not have a lifting beam. As this was required for both lifts, Lödige Industries developed a concept for an extended load bearing beam, that was created and installed by one of Holland & Barrett’s partners in this project.SolutionIntegrating with Holland and Barrett’s daily routines ensured continuous production to address the rising demands and orders.The SHERPA goods lifts are transporting goods over four floors. This allows the customer to maximise its warehouse space and move their goods quicker and more efficiently.To facilitate multiple lifting points and transport unstable loads, Lödige Industries provided a temporary scaffold platform.

A Stannah Midilift SL has brought access for all in Air Extreme, the South West’s premier indoor trampoline park in Barnstaple, proving once again what a good sport this platform lift is. Essential for people who can’t use the stairs, this hydraulic lift enables access for all to two storeys of high-octane facilities, designed to push fitness levels to the max. The Midilift SL can fit where standard passenger lifts can’t – next to the turned metal staircase in this case, with both freestanding structures sharing the same ceiling aperture to the first floor.

In densely populated urban areas of the cities, where the number of floors in housing is sometimes limited and private gardens are rare, a rooftop terrace or patio is becoming a popular design choice. However, many residential buildings with rooftop gardens don’t see much daylight and careful consideration is required to determine an access point to the roof terrace. For such rooftop projects, a new dimension of roof access is offered by the LAMILUX Flat Roof Access Hatch Comfort range, designed to give a generous daylight intake in attic apartments alongside convenient access to the roof terrace creating an air of grace and beauty both internally and externally. The LAMILUX Flat Roof Access Hatch Comfort range now introduces its fourth product into the family, giving more choice and flexibility when creating a luxurious living space with an exclusive ambience. Featuring unrestricted use as a natural ventilation device and convenient access to the roof terrace, the indoor climate also benefits from the high energy efficiency of the range thanks to the thermally broken frame and excellent air tightness values.The existing Solo and Duo Flat Roof Access Hatch products from LAMILUX open laterally by moving one or two panels horizontally to create direct access to step onto the roof terrace, whilst the space-saving hinged opening Swing variant swiftly opens its one meter by 3000 or 3500 mm long aperture to 84 degrees in just 25 seconds. The fourth, and newest addition to the Access Hatch Comfort repertoire the Square, makes it possible, for the first time, to also use spiral and platform staircases underneath. Until now, access to the roof was limited to straight stairways due to the elongated rectangular shape of the roof access hatch range. The Square only takes 45 seconds for the concealed hydraulic drives to silently open the 4m² glass element of the skylight by 70 degrees. As with the Swing, the new variant does not require any additional space on the roof terrace than its own size in closed form, even when open, thanks to its swing mechanism.   Visually, the aluminium border frame throughout the product family, attracts attention as an architectural highlight. The aluminum profiles and the reveal surface can be coated in all RAL colours offering further choice and exclusivity. Since the glass panes and frame feature a flush edge detail both internally and externally, and all variants are designed with an inclined surface, the range boasts not only a visually appealing seamless design, but also ensures that rainwater can run-off easily without leaving any dirty edges or water ponding. Safety is standard in the Flat Roof Access Hatch Comfort product family with fall-resistant glazing which can be walked on to a limited extent for cleaning purposes. As an additional safety feature, a light barrier is installed as standard which prevents the closing of the access hatch as soon as it detects something in the entrance area. In terms of energy, the new roof access hatch continues the tradition of all LAMILUX skylights: The overall system, which is free of thermal bridges and isothermally balanced and the option of special glazing meets modern demands for sustainability, energy efficiency and climate protection which ultimately save heating costs and minimizes condensation. All four products in this family have one further thing in common: They are delivered completely pre-assembled to the construction site, lifted onto the roof by a crane provided by the customer and then installed swiftly and easily. This minimizes the risk of errors and saves valuable time – both for the contractor and for the apartment user who ultimately gains access to the roof terrace. 

It can be difficult to find a lift that will operate outside without providing complete shelter from the elements. Full enclosures can have a significant impact on the building appearance and there may also be space constraints in lightwell situations. Penny Hydraulics Ltd uses design automation to quickly produce layouts based on its modular lift systems that can be adapted for external installation. The company has been manufacturing lifts in the UK for over 30 years and so has much experience to help find solutions that it knows will work well for the end user. Blueprint Studios in Manchester were experiencing problems moving audio equipment up to the first floor recording studio safely. It would have been very costly to fit internally both in terms of cost and space so a Penny Hydraulics MezzLift was installed externally within a minimal black frame and polycarbonate clad shaft to satisfy Listed Buildings consent. This saved considerable building works whilst enabling the Studios to become safer and more efficient. If the change in level is below 1.5 metres then a Loading Bay Lift could have been used that has much less impact over a more traditional style lift.

The Stress Research Institute in Stockholm, Sweden, conducted a study with Ecophon in a real-life office environment to examine how sound affects people in open-plan offices. During the study the sound environment went from poor to good and back to poor again.

The former ToysRUs premises in Luton required complete refurbishment and part of the project involved renovation of the metal roof. Liquasil's BBA Approved Metalseal 20 system was specified because it includes the advanced, SWT Primer to treat cut edge and spot corrosion in-situ. The metal gutters were lined with Liquasil's Gutterseal, seamless liquid gutter lining system. Upon completion of the metal roof coating project, the unique, Liquasil Latent Defects Insurance Guarantee was issued. The Liquasil guarantee includes cover for Professional Design, meaning that you can specify Liquasil products with 100% confidence.

Consider something more than a standard baby changing unit or station for changing nappies – a place of well-being for both parent and child.

Goodluck Hope is an exciting new development located on the historic Leamouth Peninsula, with incredible views along the River Thames, settled by Allies and Morrison architects. The development includes new shops, restaurants, bars and outside spaces to eat, shop and relax in. In order, to protect the façade elements and ensuring the protection of the building against driving rain and moisture preventing future corrosion, insulation deterioration and mould growth at the same time it increases the building energy efficiency and minimizes the condensation risk, Effisus Breather FR-B Membrane and Effisus Breather FR Class A1 membrane were applied.

These bespoke 'top hat' folded panels have been used on the external walls and windows of Aston House, Finchley.Produced in both perforated and plain aluminium, these panels have been finished in a polyester powder coated finish

It’s great to see our curved perforated panels feature in the ceiling rafts of the new Tessuti flagship store in Liverpool. Fabricated and designed to pattern match, the ceiling features can be found in the main shopping area and changing rooms. These ceiling rafts range from single to triple rings around columns to larger obround and rectangular panels and are supplied in their natural aluminium finish. This highly reflective finish was used to highlight the vibrant column displays and video footage.

Our customer required a solution where the floor drains and channels could withstand the variance of temperature in the spa, and support footfall from the public, whilst maintaining an luxurious appearance in line with the environment. Alongside the drains for the changing room showers, using a bespoke design, BLÜCHER created a circular channel to surround the ice fountain, and an arched channel in grade 304 stainless steel with an infill grating to accompany the experience showers. Our infill gratings were the perfect choice for this spa setting, allowing a flawless finish of the chosen floor type against the drainage, completing the aesthetic appeal of the room

The lightwell lift includes caged, enclosed sides to secure the load and prevent the risk of anything falling from the platform onto people below. Interlocked doors were fitted to prevent any accidents whilst the goods lift is in use. Interlocks ensure that the lift will only operate whilst the doors are locked shut, opening again once the lift has travelled to the level required. This provided the team with a safe and efficient lifting solution when moving their big commercial bins from below ground to pavement level. The 500kg capacity allows deliveries to be taken from kerbside to the basement.

The 16,500m2 new Faculty of Social Sciences building is designed to meet the future growth demands of the department up to the year 2035 and creates a world class, BREEAM outstanding building that encourages collaboration and enhances the Faculty’s reputation for excellence in teaching and research.The landscape design for the new University of Sheffield building set out to create a large area of public realm on the social sciences campus, with provision for sustainable drainage systems including extensive use of tree pits and rain gardens. As part of the SuDS design specifications, a Blue Roof stormwater drainage system was considered as an alternative option to underground attenuation tanks to keep surface water run-off within the discharge consent.ABG were able to demonstrate that specifying a shallow Blue Roof attenuation layer involved much lower carbon emissions than excavating underground storage tanks.The volume of vehicle movements required to install underground stormwater attenuation compared to the ABG blueroof system was calculated (delivered from ABG’s factory based 25 miles away), and a carbon footprint saving of 59% was estimated. The reduction in construction emissions was deemed particularly important given the site’s proximity to the Royal Hallamshire Hospital.The 108mm ABG blueroof system design was fitted over a 4,500m2 roof catchment area by the ABG Installs team over a period of 8 weeks. The inverted roof system build-up includes a 245mm XPS insulation installed onto the waterproofing with a Water Flow Reducing Layer (WFRL) above. The ABG Deckdrain 4mm geocomposite drainage layer is installed above a 100mm void former, wrapped in a Terrex NW20 geotextile layer to prevent debris entering the drainage voids. The roof build-up is completed with a surface finish combination of stone ballast and 63mm pavers.For the majority of the year, the roof drains into the rainwater outlets as normal, however during prolonged spells of heavy rainfall the void formers begin to temporarily attenuate the stormwater. During storm periods the rainfall outflow rate is slowed using 13 stainless steel restrictor chambers, positioned above each rainwater outlet.This controls the volume of water that is able to discharge from the roof during the storm, minimising surface water run-off and reducing the risk of flooding in the local area. The system is calculated to only reach maximum attenuation volume during a 1-in-100 year storm event, as calculated using the Flood Estimation Handbook rainfall data for Sheffield, plus 40% allowance for climatic change. The system features an integrated overflow outlet in the event a storm occurs that exceeds this designed capacity.

The stadium is actually tilted on one side a little bit which makes a lot of significance. The slope is from the north end of the ground to the south end of the ground. And the difference in depth is 2.5 metres.This is where I wanted to arrive:With or without a slope? That's the question. Sometimes, having or not having a slope in a site, can make all the difference for the drainage solution needed. As you know, as slope limitations can be found in some places, but in ULMA we have a solution:The first Polymer Concrete channel with built-in 2.5% slope.