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The Company Useful Information:
- High Performance Homes Benefit From Sustainable Construction
- Severn Gorge Puts Trust in NBT
- NBT insulates ‘English building’ museum
- NBT insulates multi award winning Waingels College
- NBT insulates luxury Scottish countryside home
- NBT insulates award winning recyclable school building
- NBT insulates ‘Outstanding’ SusCon
- NBT insulates the UK’s first affordable certified Passivhaus
- NBT envelope succeeds at Expo
- NBT meets ‘Excellent’ criteria for One Brighton
NBT insulates ‘English building’ museum
Natural Building Technologies’ (NBT’s) high performance woodfibre systems have been used in the construction of the building crafts gallery at Weald and Downland Open Air Museum in Chichester. The museum’s former director, Richard Harris, designed the new building to be energy efficient and contemporary in its design, yet fitting with the aesthetics of the surrounding historic exhibit buildings, including 13th-19th century houses and working buildings. NBT’s woodfibre insulation systems provide the thermal insulation required to make the structure energy efficient, as well as the added benefits of high thermal mass to mitigate against summertime overheating, and breathability to safeguard a healthy environment.
The museum exhibits the transformation of English building design and technology throughout the ages, displaying over 50 historic buildings which have been rescued from southeast England and rebuilt on the site. In order to blend in with such structures, the new crafts gallery building has a predominantly timber structure, incorporating the NBT woodfibre insulation systems. The locally sourced douglas fir timber frame was constructed by Greenman Carpentry Co Ltd, and is finished externally with fresh sawn larch cladding.
NBT’s Pavaflex woodfibre insulation was used as infill insulation between the studs of the external walls. OSB was fixed to the internal face of the studs to provide racking strength and airtightness. The external face of the studs is enclosed with NBT Siga Majpell membrane and Wigluv tape, which provide full protection from moisture ingress while minimising air leakage through the building envelope. The tape and membrane are fully age-tested and maintain performance for over 60 years. Batons were then fixed horizontally across the studs with fresh sawn larch cladding nailed to the batons as the external wall finish.
NBT’s Pavaroof woodfibre insulation system was used to insulate the building’s roof. This features NBT Pavatherm Plus fixed in a continuous layer over the rafters, with NBT Pavaflex infill insulation between them. The roof was then finished externally with traditional pan tiles.
Through the creation of a thermal shell, NBT’s woodfibre insulation systems deliver a thermally coherent structure, which, combined with their excellent thermal properties, provide outstanding thermal insulation.
NBT systems meet with the museum’s requirements for responsible sourcing, low toxicity and high-recycled content material. The woodfibre locks up more carbon than is used throughout its manufacture and delivery to site. It consists of 95% plus waste wood composition and is wholly recyclable. Furthermore, the hygroscopic properties of the woodfibre material makes it fully breathable, meaning that its use reduces the risk of interstitial condensation, resultant mould formation and the associated health risks to occupants and structural risks to the frame.
