"dpc"

The forming of a level threshold would be easy if the designer did not have to consider the prevention of damp ingress. The problem is a number of elements converge at a threshold, and when the threshold is required to be practically level, it can be difficult to bring together protective measures in a manner that promote integrated functionality and structural convenience. A different approach to forming level thresholds is offered by Cavity Trays Ltd. It literally and physically covers the problem. The Type LTT Level Threshold Tray is a three-dimensional preformed DPC that envelops opening masonry skins.

The Problem:Associated problems caused by damp and flooding are commonplace throughout the UK’s housing stock. Growth of black mould and efflorescence caused by salt transfer can lead to thedelamination of the plaster and there is no simple resolution. Often the only choice left to the housing association or local authority is to remove the original plaster and treat the walls with a Damp Proof Course (DPC), before waiting for it to dry to receive a backing plaster – all at the expense of the landlord or local authority.The Solution: A Modern, Lightweight Renovating Plaster:Limelite Renovating Plaster solves all of these problems. Firstly, it can be applied to damp walls, saving an enormous amount of money for time that would be otherwise spent waiting for the walls to dry out – it effectively controls dampness passing through walls, as well as providing a barrier against salt transfer – ultimately allowing the substrate to dry naturally. Secondly, and crucially, Limelite Renovating Plaster will withstand damp issues caused by future events, which may be likely in properties susceptible to damp and flooding.Thirdly the Limelite plaster system offers Thermal Insulation by drying the walls rapidly, reducing loss of heat and insulating the internal walls to meet modern day standardsThermal Conductivity, λ10,dry,mat, P=50% = 0.17W/m.KThermal Conductivity (k) at 0% moisture = 0.13W/m.KAnother benefit with Limelite plasters for internal use is their fire resistance/protection as a non-combustible product (as defined by BS476:Part 4) which can be assigned Class O in accordance with the requirements of the National Building Regulations and Reaction to Fire = Euroclass A1 Making the Difference for Local Authorities Dudley Council in the West Midlands is among the many local authorities that specify the use of Limelite Renovating Plaster when tackling such issues in social housing.“Where a renovating plaster is required we use the original and proven, Limelite” said Andy Pratt, Specification and Design Manager for Dudley Council, which has been specified by the council for over 40 years.Where existing plaster is sound, a small area of plaster is removed and replaced with Limelite.In more severe cases where the existing plaster is unsound, all plaster is removed and the wall is treated with a DPC before Limelite Renovating Plaster is applied. Limelite Renovating Plaster is also used for patch repairs in areas such as window reveals, where again the damaged plaster is removed and replaced with Limelite.A BBA Approved SystemLimelite Renovating Plaster is a BBA approved solution, when used as the backing plaster in a 2-part system, finished with our High Impact Finishing Plaster - a hard, durable finishing plaster that produces a Grade D impact resistant surface.

Newton Specialist Contractors ASF Waterproofing were called in to investigate why the Bridge Master’s Quarters at No.1 Tower Bridge was suffering from damp and proceeded to install multiple Newton products to resolve the issue.At the world-famous Tower Bridge, landscaping contractor Maylim was commissioned by the City of London Corporation to investigate why the Bridge Master's Quarters at No.1 Tower Bridge was suffering from damp.After excavating, they discovered that the structure had no effective damp proofing protection. Newton Specialist Contractor ASF Waterproofing were commissioned to install new damp proofing measures to solve the issue.ASF Waterproofing approached the project in two phases, using multiple products to effectively damp proof both inside and outside the building. At the start of phase one, ASF correctly prepared and cleaned the internal wall surfaces before installing a new damp-proof course by injecting Newton 804-DPC into the walls at regular intervals, then sealing the holes with Newton 313-WP. The walls were then smoothed with a new internal render, ready for Newton 103-S to be quickly and easily sprayed to provide a final barrier to water.For phase two, the ASF team turned to the external walls of the structure, preparing and cleaning the surface before applying a new external render coat. The wall was then thoroughly waterproofed with four coats of the flexible, resilient Newton 109-LM. To ensure that the building was completely protected externally, the waterproofing began at 1 metre below ground level and extended all the way up to the existing windowsills.Thanks to their meticulous attention to detail and high standard of installation, ASF Waterproofing were able to provide both the contractor and the client with a high-quality and comprehensive damp proofing solution. As a result, the City of London Corporation can now hand over the building to the new lease holder, safe in the knowledge that it is well protected from damp.

Providing the solution for EWI retrofit on non-traditional build housingHaving successfully completing the previous 2 phases, K Systems were approached to provide a specification for EWI installation onto two non-traditional build housing types: 5M and Caspon. Both archetypes are of timber frame construction with single skin brick infills at ground level and a mixture of hanging tiles or cladding on upper floors. Typical of non-traditional build housing, the technical team at K Systems had to pay particular attention to bespoke detailing to derive a suitable EWI solution to meet the client’s requirements.The hanging tiles and cladding were removed from the upper floor(s) and replaced with timber sheathing boards to allow for a uniform aesthetic and a striking contemporary finish.Delivering a robust, safe and aesthetic system solution to meet the project requirementsHull City Council wanted to improve the thermal efficiency of their housing stock whilst provide a durable and more contemporary aesthetic look for the project. A combination of K Systems M Silicone and K Systems M VBriQ was used to achieve a u-value of 0.28 using varying thicknesses of A1 non-combustible mineral wool (80mm to 150mm) to adapt to the variety of substrates typical of non-traditional build housing. The combination of acrylic brick slips and polymer enhanced silicone topcoats achieved an appearance that is durable and elevated the dated look of the estate to a more modern feel. Our team worked extensively with the appointed architect preparing bespoke detailed drawings for the various archetypes, particularly transitions between the brick and timber substrates, cills, verges, rooflines, gas boxes and below DPC. Weekly demand planning meetings ensured timely delivery of materials to the appointed contractor.We ensured the correct fixings were specifiedK Systems commissioned pull-out tests to determine the optimum fixings and washers to be used to anchor the EWI system to the different substrates. A combination of hammer fixings and screw fixings were specified.

IntroductionThe Keyfix Non-Combustible Cavity Tray System has played an important role in futureproofing a major new residential development in Stratford’s Olympic Park by exceeding new building regulations whilst improving build quality and installation efficiency on site.OverviewLocated in the very heart of the Queen Elizabeth Olympic Park, Chobham Manor in East London is the first of five new neighbourhoods in the former home of the 2012 Olympics. Comprising 850 new one, two and three-bed homes alongside community facilities, shops, public green spaces and community areas, this stunning new development has sustainability at its core with all homes built to the Code for Sustainable Homes Level 4.In a design by JSA Architects and built by Taylor Wimpey, the layered brickwork façade features projected bay windows, balconies and set back terraces. To meet the requirements and a tight build programme, Keyfix worked with subcontractor Chine Brickwork and supplied 4545 metres of Keyfix Non-Combustible Cavity Trays (NCCT) along with Corner Units and Weeps on blocks A, B and C which form Phase Four of the development.ChallengeThe challenges for Keyfix were the unique brickwork build programme which incorporated two runs of cavity trays being supplied per floor to accommodate brickwork corbelling and recessed brickwork.SolutionAs the corbels where built at a different stage on the build programme so the Keyfix Non-combustible Cavity Trays had to project out either side of the pier when initially being installed. Therefore, when the infill corbels where being built the continuous run of tray could link in seamlessly. A task that would have been near impossible had the system relied on tapes or mastics to make the linking joint.The Keyfix stainless steel NCCT was specified due to its self-supporting system which doesn’t need fixing back to the internal concrete frame and clips together for fast and easy installation. It is essentially a ‘Fix & Forget’ solution with no additional fixings, sealants or onsite fabrication required by the brickwork contractor. Therefore, installation of the trays did not impede the speed of bricklaying even when compared to traditional DPC. Installed in the outer leaf with no connection with the inner skin, this innovative cavity tray system does not create a thermal bridge and eliminates all differential movement issues.With a lifespan of 125+ years it is the only non-combustible cavity tray system that does not rely on tapes and mastics to make watertight joints, therefore elimating one of the main reasons for product failure.Commenting Kieran Coyle of Keyfix said: “Holding an A1 Fire Rating, the Keyfix non-combustible cavity tray solution exceeds the minimum standards set out in ADB (Approved Document B), whilst ensuring this new development meets and exceeds the latest regulations. If the regulations become stricter, it will also be futureproofed maximising the whole-life value of the development.”The award-winning Chobham Manor Phase Four is now complete, with the Keyfix Non-combustible Cavity Tray playing an integral part in the creation of a safe and resilient development that will transform the Olympic Park into a lasting legacy for East London.For more information about the Keyfix range of non-combustible solutions download the product guide, visit https://keyfix.com/or for technical support call 028 8676 7508 or email info@keyfix.com

IntroductionThe speed of installation and improved build quality of the Keyfix Non-Combustible Cavity Tray System has played an important part in the construction of a major new high-rise residential development in West London and at the same time help meet and exceed regulatory requirements.OverviewLocated close to the Thames in Brentford West London, Verdo – Kew Bridge is a new mixed use development which forms part of a major new regeneration scheme that includes the new community stadium for Brentford FC. Designed by Broadway Malyan and built by developer EcoWorld, it comprises of 487 new one, two and three-bed homes alongside retail and business spaces, public green spaces and community areas.In order to safeguard the future of the development, Keyfix supplied 765 metres of Keyfix Non-Combustible Cavity Trays (NCCT) along with 2490 Corner Units, 4000 Pier Units and 5000 Weeps on blocks E,F,G and H of the development.ChallengeOne of the key challenges for Keyfix was the brickwork build programme which required early completion at the lower grid line levels of one to six. This was due to the scaffolding needed to be stripped away because it was blocking a walkway at Brentford Stadium and therefore needed to be cleared prior to the start of the new football season.SolutionWorking to a tight schedule, the offsite fabrication and preforming of bespoke non-combustible cavity tray units in line with the brickwork set out drawings saved time for the installation team at brickwork contractor DWG. This one-piece NCCT system allowed for a very simple and very efficient install, enabling the brickwork façade to continue at a fast pace.The Keyfix stainless steel NCCT was specified due to its self-supporting system which doesn’t need fixing back to the internal concrete frame and clips together for fast and easy installation. It is essentially a ‘Fix & Forget’ solution with no additional fixings, sealants or onsite fabrication required by the brickwork contractor. Therefore, installation of the trays did not impede the speed of bricklaying even when compared to traditional DPC. Installed in the outer leaf with no connection with the inner skin, this innovative cavity tray system does not create a thermal bridge and eliminates all issues associated with differential movement.Furthermore, the NCCT is manufactured with integral Stop Ends on each cavity tray to ensure water is trapped and channelled outwards via a Keyfix Non-combustible Weep (NCW). The integral Stop Ends also facilitate perp joint width adjustability of +/- 3 mm between 7–13 mm if required.With a lifespan of 125+ years it is the only non-combustible cavity tray system that does not rely on tapes and mastics to make watertight joints, therefore eliminating one of the main reasons for product failure.Commenting on the project, Kieran Coyle, Keyfix Technical Sales Manager said: “Verdo – Kew Bridge was the first project in which we created and used a Component Schedule and this is now the same component schedule template we use on every project. It allows installers to use new Component Codes to identify the different components and install the system to its full integrity.”Holding an A1 Fire Rating, the Keyfix non-combustible cavity tray solution exceeds the minimum standards set out in ADB (Approved Document B), whilst ensuring this major new development meets and exceeds the latest regulations. If the regulations become stricter, it will also be futureproofed maximising the whole-life value of the development.Set to make its mark on West London, Verdo – Kew Bridge is on track for completion, with the Keyfix Non-combustible Cavity Tray meeting the contractors requirements and enabling the creation of a development that has safety built in.For more information about the Keyfix range of non-combustible solutions download the product guide, visit https://keyfix.com/or for technical support call 028 8676 7508 or email info@keyfix.com

IntroductionThe Keyfix Non-Combustible Cavity Tray has been installed as part of a major housing project , Park East in South East London, helping to improve efficiency onsite, and to exceed building regulations.OverviewPark East is a £95 million development in Erith, designed by ECD Architects and developed by Wates Group. The project comprises 320 new homes, of which 20% are for private sale, 24% for Shared Ownership, and 56% for rent in order to accommodate a mixed tenure community. The modern, stylish homes are in close proximity to the local amenities and parks, with excellent transport links to London.Working alongside brickwork contractor Lee Marley Brickwork, Keyfix supplied 3,772m of its Non-Combustible Cavity Tray (NCCT), 3,528 units of corners, and 20,774 units of its Non-combustible Weep Vents to this project. Keyfix’s sister company Keystone Lintels supplied 890m of its Non-Combustible Cavity Tray Lintel, which was powder coated as per the client’s request.Challenge The main challenge faced on this project was the brevity of the programme, which ran from November 2020 to November 2021. As the project was time sensitive, the main contractor required an accredited solution which could be supplied in line with the tight-build programme. Keyfix’s NCCT presented the ideal solution to this challenge.SolutionKeyfix was able to meet the client’s objectives by providing products in accordance with their tight-build programme. To ensure the maximum efficiency of installation, Keyfix designed various types of bespoke units including preformed corners and pier units to assist Lee Marley brickwork in keeping to its the fast-paced build programme. Due to the scale of the project, the products were prefabricated, allowing the brickwork to be conducted swiftly. Despite the bespoke nature of the products, the first delivery was made just two months after the initial enquiry in September.Duncan Marley, Contracts Director at Lee Marley Brickwork commented: “On the Park East development we required various bespoke products and Keyfix were able to provide a quick turnaround on those. The Keyfix NCCT also helped us to save time significantly because the system is so quick to install. Keyfix also provided us with a scheduled breakdown of components which was a great help.”The Keyfix NCCT was specified due to its ‘one-piece system’ which allows for a very simple and efficient installation. The system is self-supporting as it doesn’t require fixing back to the internal frame, therefore saving valuable time. Additionally, the adjustability of the perp joint allows for the cavity trays to be shunted to match the brick coursing on site, ensuring consistency in the brickwork formation.The NCCT was also chosen due to its A1 fire rating. It is made from non-combustible Grade 304 stainless steel which will never contribute to fire loading in the building. This fully compliant system ensures that the Park East buildings will be future-proofed against the implementation of tighter regulations.The non-combustible nature of the product makes it an effective solution to provide DPC protection over lintels, masonry supports, soffit systems and other elements in the cavity such as fire barriers. Additionally, the fact that the Keyfix NCCT does not rely on tape or mastics to form its watertight joints negates the prevalent cause of product failure and creates a more robust system altogether.In addition to providing NCCTs, Keyfix identified where it could offer technical support, and provided a full technical review of architects drawings, a comprehensive mark-up, and a scheduled breakdown of component location. The team also attended design meetings to ensure that the products were being used correctly, as well as hosting a Tool Box Talk prior to the first install to ensure the system was installed properly.Commenting on the NCCT, Kieran Coyle of Keyfix stated, “The Keyfix Non-Combustible Cavity Tray is an A1 fire rated system, ensuring our customers peace of mind as their buildings are future-proofed and safeguarded against fire, as well as our on-site benefits.”The Keyfix Non-Combustible Cavity Tray has played an important part in the creation of a safe new-build development for future tenants to enjoy.

A new crematorium facility for Huntingdon Town Council, Huntingdon Crematorium is a collection of buildings equipped with ceremonial spaces and the appropriate crematory functions. The specification of Vandersanden’s Perla and Morvan bricks has resulted in buildings that have made a striking contribution to the landscape of the greenfield site while also helping to change the accepted perception of crematorium buildings. “We were looking for a way of making the process of going to an end of life ceremony uplifting and hopeful,” explains Mark Doohan, managing director at Benchmark Architects. “We had the idea of creating a curved, white, brick building within which there are beautiful, light filled and airy spaces.” When envisioning the scheme, the team at Benchmark Architects realised that by inserting a black brick wall across the site they could create a ‘canvas’ that provided the separation between the front of house and working areas of the crematorium. Against this, on one side, they packed three curved white brick volumes to create the key spaces, adjusted in height according to the hierarchy of their importance: the entrance lobby, waiting room and chapel. Out of sight, behind the wall, are the cremators, plant rooms, offices and other functional elements. The design focuses on a central drum flooded with natural light. The main building contains the ceremonial hall for 125 people, waiting rooms and crematory with capacity for two cremators. A second building contains a multi-purpose function room - that can be used for wakes - and a café with associated catering facilities and administrative offices. Having created the design vision, the choice of appropriate bricks was crucial. Good white bricks are hard to come by, often they’re tinged with yellow or beige; finding black bricks that are not simply colour coated or are a dark blue is equally hard, says Doohan.“We were delighted when we were able to find the Vandersanden bricks. We genuinely love the texture and through colour quality of Vandersanden’s white Perla and black Morvan bricks. They set off our concept perfectly, with the white brick capturing the light in the way that we envisioned when first sketching out the idea.” A double soldier course heads the windows to form a band around the building and is repeated close to the top of the main drum. There is also a recessed course 500 mm off the ground that creates a scored line at the base, bringing additional balance to the building. This is achieved by setting one course back by some 25 mm. Another advantage of the Vandersanden bricks is that they can be used in the ground below DPC level, visually rooting the building to the landscape. It was essential that the volumes were homogenous in feel so a good mortar match was vital. Lime mortar was selected and was aesthetically important due to its colour, texture and because its flexibility reduced the number of movement joints required. The lime used, NHL 3.5, was naturally white; for the black brickwork it was pigmented. When seen from a distance, only the overall form of the building is perceived but, on getting closer, the brick details start to stand out. Then, when really close, the contribution that the texture, pattern, shape and almost handmade quality of the individual bricks makes to the quality of the building becomes clear. We’re always keen to specify products where we get really good technical support, notes Doohan. “Vandersanden were excellent at providing advice and technical backup whenever we had a question. Since becoming aware of Vandersanden products, they are our go-to source for brick. As architects, we’re image-based creatures so the website is incredibly helpful. It’s an excellent way of being able to see the bricks in loads of different and inspiring building types. Many brick suppliers don’t show that connection. Most importantly, our client for Huntingdon Crematorium is delighted with the brickwork.”To find out more about the bricks used in this project or to see the wide range of high-quality bricks available from Vandersanden, click on the 'View more' link