PRODUCT AND WHERE USED MANUFACTURER ALTERNATIVES CONSIDERED REASONS FOR FINAL CHOICE Roofing - single-ply membrane to flat roofs Prelasti by AAC Waterproofing Three-layer felt and asphalt Prelasti is quick to install. It is made of rubber, a natural product. It comprises up to 40 per cent recycled rubber Cedar shingles to pitched roof Rawnsley Woodland Products Sweet chestnut shingles Cost Pitched and flat roof - fibreboard insulation board - Isolaire Natural Building Technologies None Environmentally friendly and cost effective Pitched and flat roof insulation quilt of hemp recycled cotton - Isonat Natural Building Technologies Lambswool Slightly more cost effective External walls - Bayosan limesilicate render on Diffutherm wood-fibre insulation Natural Building Technologies None Environmentally friendly and cost effective External walls - sweet chestnut cladding on counter battens.
Pavatherm wood-fibre insulation with latex additive Cladding by Inwood Developments;
insulation by Natural Building Technologies None Environmentally friendly and cost effective Windows and sliding doors to main bedroom, and 'normal' single doors to kitchen, office and utility:
composite aluminium subframes and timber main frames Velfac Direct Rationel and Nordan Beautiful, low energy and cost effective Folding/sliding doors to family/ dining and living rooms with integral blinds by I.D Systems I-D-Systems Solarlux They can fold away leaving an open corner. At the time, Solarlux could not provide this. Low-energy folding-door system Hot water evacuated solar panel situated on a flat roof above the main bedroom Viessmann UK Systems by Thermomax, Eco Home Tech and Southern Solar Cost effectiveness Rainwater harvesting Freerain Rainwater Management Systems and Gusto Products Rainwater Harvesting Systems Cost effectiveness Rainwater goods made with 40 per cent recycled steel Lindab UK None Cost effectiveness and recycled-material content and it looks good Non-toxic softwood timber treatment for timber frame ProBor timber preservative by Safeguard Europe None We want to reduce toxic materials on site and our carpenter is allergic to normal timber treatments Non-toxic organic paints for internal surfaces Natural Building Technologies Green Store and Ecos Paints Genuine non-toxicity