Product category:
Materials
News Release from: Natural Building Technologies | Subject: NW1 System
Edited by the Buildingtalk Editorial
Team on 09 March 2005
Timber frame low cost high thermal
performance
Natural Building Technology NW1 timber frame system provides high thermal performance at low cost.
Cae Banc is a two-phase bungalow development Phase one used conventional concrete blocks, but the larger phase two uses Natural Building Technology's (NBT) NW1 timber frame system to provide high thermal performance at low cost
This article was originally published on Buildingtalk on 13 Jun 2003 at 8.00am (UK)
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The client was keen to go beyond the basic building regulations and present a higher performance specification whilst still keeping within the budget.
The client was also keen to trial a modern, ecologically sound, timber frame solution and NBT's NW1 System allowed all these objectives to be met.
NBT provided design support, including detailing plus thermal and interstitial calculations.
NBT also provided on-site training to subcontractors.
Materials supplied included Diffutherm woodfibre boards, render, beads rails, mesh, equalisation paint etc The walls were designed to a high thermal standard, (low U-Value), providing a final U value of 0.26 W/m2K.
This was a significant improvement over the conventional phase one which was designed to 0.35 W/m2K.
This was an important consideration as the houses will be occupied by people with disabilities and require continuous, 24 hour a day, heating.
The NW1 system is very quick to build.
Once the frame is erected windows and doors are positioned to allow the cladding insulation to be fitted and rendering applied.
Robust detailing throughout the system allows all membranes and vapour checks to be eliminated, along with their potential difficulties.
NBT's Diffutherm woodfibre boards were used as they have an exceptional ecological profile and consist of 99.5% waste pine wood.
The boards contain no artificial glue or resins, are extremely vapour open and have excellent moisture regulating properties.
Propriety mineral-based Baumit-Bayosan renders were used in conjunction with the boards which are "vapour-open" and also have low embodied energy.
These products were complemented by the use of cellulose insulation made from recycled newspaper used as the fill insulation between the timber stud work.
Bungalows produced using NBT's NW1 systems can be considerably cheaper to heat than conventional bungalows, yet they provide higher comfort levels.
They also offer higher acoustic insulation and summer overheating protection.
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