Low Energy Victorian House Refurbishment 11 April 2008 This project aims to show Victorian dwellings can be refurbished to address both heritage and energy so that future generations can take pride in their architectural heritage without seeing them as an environmental burden
Conserving Buildings and/or Energy? • 56% of housing in London is of solid wall construction. • Much has heritage value. (60% of Camden is within Conservation Areas) • Solid wall houses on average have almost double the emissions of those built to current Building Regs.
17 St Augustine’s Road • Owned by Camden Council who are refurbishing it for social housing • The project will centre on 17 St Augustine's Road a Victorian house in a conservation area. • It will aim to reduce emissions by 90% based on normal use.
The project • UCL will monitor the house during construction and occupation. • It will link to other low energy house projects including 73 Chester Road, Camden & 78 Carshalton Grove, Sutton. • Funded by Camden Council and Urban Buzz. • Support from Sustainable Energy Academy and Kingspan. • The Council’s conservation & urban design team are involved & English Heritage has contributed to initial work. • Steering Group includes: SDC, GLA and SEA
Interesting Challenges Thermal Bridges galore Surreal and idiosyncratic decor
Dynamic Tension Emissions/Conservation • Emphasis on Emissions Reduction “Decisions such as the design of the wall insulation should not be being made by heritage consultants without involvement from people with expertise in building physics and engineering. (Conversely, decisions about heritage should not be being made by engineers without the involvement of people with heritage expertise - but there is no immediate risk of this. ) • Emphasis on Building Conservation “full compliance with the energy efficient requirements of the Building Regulations would unacceptably alter the character or appearance of the building”
Reducing Energy Use - Proposals • Double glazed windows 1. 5 W/m 2 K • Floors 0. 20 W/m 2 K • Sloping Roof 0. 11 W/m 2 K • Flat roof 0. 20 W/m 2 K • Wall insulation to 0. 20 W/m 2 K • 6 m 2 Solar Thermal • 3. 5 KWp Solar PV • Localised Heat Exchange Ventilation
Technologies considered • Secondary glazing using vacuum double glazing to 1. 0 W/m 2 K • 3, 000 litre rainwater harvesting • Ground Source Heat Pump • Wood wool insulation conductivity 0. 04 W/m. K • Over cladding side and rear • Whole House Heat Exchange Ventilation
Impact of energy efficiency measures
Impact of energy efficiency measures Energy Costs Existing house Energy Costs – Low Energy house
Costs cost tonnes CO 2 • Solar PV £ 25, 000 1. 4 • Solar Thermal £ 8, 000 0. 5 • Double glazing £ 24, 000 1. 3 • Roof Insulation £ 6, 600 3. 4 • Wall insulation £ 11, 000 3. 3 • Leakage reduction £ 2, 666 1. 0
Dissemination & Research • Urban Buzz funded research conducted by UCL – Monitoring of temperature and humidity in walls – Pressure and Co heating test – Survey of fuel use by neighbours – Seminars on low energy refurbishment – Promote debate.
Construction starts Jan 2008 We didn’t expect the bricks to come off. Cornicing? !!!? Sorry English Heritage
Insulation going in Lots of insulation and training.
Insulation what it looks like 1 Don’t forget the space between the floors and ceilings. Its air leakage stupid.
Insulation what it looks like 2 How do you fix the bog to the wall? Is there ever too much insulation?
A few questions to mull over • How much will it cost to make 60%-90% emission savings in all the solid wall houses in the UK stock? • Who will pay for it? • What is Heritage? • Whose Heritage is it any way? Chit Chong, Energy & Sustainability Manager (Acting) chit. chong@camden. gov. uk
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