Bright Green Homes LLP designed and project managed this Ecorenovation creating a beautiful home with a high specification finish that reduces the overall CO2 emissions from 9 tonnes per annum to 2.5 tonnes per annum.
The plan for the work involves three stages, with most of the work and refurbishment completed for stage 1, stage 2 being the install of secondary glazing windows and doors (double glazed sash alternatives were a bit pricey at the time), and stage 3 the installation of a FIT capable solar PV system.
Period/Age of House: Regency – 1860s
No. Bedrooms: 3
No. other rooms: 5
No of floors: 2
Floor Area: 143m2
Cost: refurbishment work £100,000
Wall: mixed – cavity/solid/bungaroosh
Energy Efficiency Measures:
This ecorenovation starts with the fabric of the building – Roof skeilings have 50mm Celotex between rafters with 100mm under rafters with an airtightness layer of Intello Plus and plasterboard and skim throughout. U value: 0.15W/m2K
Roof space above kitchen has 300mm of Warmcell recycled newspaper insulation, and roof space above living room has 300mm of Earthwool recycled glass bottle insulation both chosen to overcome separate construction problems. U value: 0.14W/m2K
External walls have a double skin of 50mm Celotex cross-battened to reduce thermal bridging over existing 40mm XPS which was retained to reduce waste: plasterboard and skim finish. U value: 0.19W/m2K
Groundfloor retained the existing XPS insulation over slab, to reduce waste with 30mm added Celotex between battens to support new underfloor heating system. U value: 0.22W/m2K
Separating floor has new suspended ceiling with 100mm of Earthwool acoustic insulation to reduce noise between floors and 30mm Celotex between joists above to form support for new underfloor heating system.
Careful reduction of draughts from existing windows and doors, with secondary glazing added to link to the installed airtightness barrier throughout the house – completing this ecorenovation’s fabric measures.
Installing a Vent Axia – Sentinal Kinetic BH – whole house heat recovery system with up to 92% efficiency and controlling condensation with trickle, boost, summer bypass and wireless controls.
Heating and Hot Water
Under-floor heating throughout supplied by a Glowworm Flexicom high efficiency condensing system boiler.
Large 250l Santon Premier Plus hot water cylinder with twin coils supplied by Kingspan Thermomax DF100 x 20 Panel on flat kitchen dormer. Which is estimated from SAP to produce 1128kWh of hot water per annum and is topped up from the gas boiler.
Lighting plan devised to increase natural light providing an additional skylight, and a Solartube for natural light in the converted studio.
Low energy Megaman 11w GU10 bulbs throughout and 0.5W LED floor lights.
LED strip lighting used in bathroom.
Natural and Low VOC paints used throughout.
in 2011 the property was bought for £499,950. The clients spent approximately £100,000 and they sold the property in 2014 for £852,500. An increase in value of 70.5%. Even when you take into account a local price increase of 8% p.a. this was a successful project in terms of financial reward as well as ecological reward.