EXTERIORS


27


Crittall windows hit thermal targets at World Heritage Site


C rittall 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,


sensitive treatment, to create 40,000 ft2


underpinned by 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 3.6 m 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.


ADF06_Crittall_External Envelope - Doors & Windows_Half Page Advertorial.indd 1


“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 1.8 W/m2K would result in a 16% annual energy saving. That translated to 21.4 tonnes of CO2


01376 530800 www.crittall-windows.co.uk 08/06/2023 10:09


25 years, that equated to a 535-tonne reduction in CO2


. Over the building’s lifespan of, say, emissions.


Airtightness simplifi ed for residential development in Dublin new town Wraptite®


the only self-adhering vapour permeable air barrier certifi ed by the BBA is at the heart of an innovative mixed-use town centre development in south Dublin. The Cherrywood project is a Strategic Development Zone that will create a new town including over 7,700 new homes, six schools, three major parks, and retail and leisure facilities. Partition and ceiling specialist contractor Platt Reilly installed the Wraptite System, from the A. Proctor Group, as an external air barrier and alternative to a traditional standard breather membrane. The use of conventional membranes require mechanical fi xing and add to the overall installation time. In this case, the Wraptite self-adhesive membrane was applied externally, quickly and easily to the external steel frame in continuous pieces. The self-adhered nature of Wraptite and its high level of water resistance and simplifi ed detailing made it an ideal choice. Wraptite is designed as an effective vapour permeable air barrier to maximise the energy effi ciency of buildings, combining the critical properties of vapour permeability and airtightness in one self-adhering membrane.


01250 872261 www.proctorgroup.com ADF06_A Proctor_External Envelope - Membranes_DPR.indd 1 26/05/2023 11:32


Double Magply deck supports sedum roof in Bishop’s Stortford


Goodsyard is a brownfi eld site in the South Side Locks area of the popular Hertfordshire market town, offering buyers paying from £257,500 up to £400K, excellent access to local amenities and a convenient 40-minute commute into London Liverpool Street. With sustainability and the environment being a central there to the design along with high build standards, the specifi cation for the sedum roofs which cover three of the buildings includes a layer of 18 mm Magply boards to provide a resilient and fi re-resistant deck. Bellway Homes is leading the build of the four to fi ve storey properties using a mix of direct labour and specialist package contractors, with LJ Carpentry being the joinery company responsible for installing the high performance Magply boards over a 300 mm depth of fi re resisting rigid insulation as part of a low energy roof construction. The fi nal covering of sedum and well graded soil over a single layer waterproofi ng membrane has been formulated to encourage local wildlife and also assist in attenuating rainwater run-off.


01621 776252 www.magply.co.uk ADF05_Magply_External Envelope - Roofing_DPR.indd 1 WWW.BUILDINGCONSTRUCTIONDESIGN.CO.UK 27/04/2023 14:58


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