Improving Energy Efficiency on Traditional Buildings
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Improving Energy Efficiency in Traditional Buildings
Moses Jenkins
Technical Conservation Group
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Improving energy efficiency in traditional buildings
• Ventilation
• Building elements: tests and improvements– Windows– Walls– Roofs– floors
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Vapour movement in a traditionally built home.
We can improve efficiency, but must be careful not to compromisethis dynamic.
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Traditional passive systems
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This Edinburgh house, built in 1840, featured a passive vent system
Air was heated in a boiler in the basement, and routedup through the house,via cornices, ductsand floorboards.
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Vents at ground level
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Hidden vents in hood moulding
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If we get it wrong..
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25%
35%
10%
20%
10%
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Baseline measurements
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Air leakage and improvements
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Draft Stripping
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Improvements tested in lab at Glasgow Caledonian
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Existing options – shutters & blinds – gave significant improvements
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Improved shutters – U value of 1.8
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shutters, curtains and blinds – reduce heat loss by 62%
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Secondary glazing
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Secondary glazing : U Value 1.7
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new sealed units within existing sashes
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vacuum DG panes – made in Japan
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Energy efficient but looks and performs well
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Thermal properties of Mass Walls
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Monitoring equipment
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Castle Fraser – U Value 0.8W/m2K for mass walls
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Lab testing as well
CGU Test Chamber
550mm Locharbriggs
Calculated U Value 1.4 W/m2K
Measured U Value 1.1 W/m2K
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Scottish winner 2009Cottage on Skye, U Value 0.6
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So what to do with a mass wall?
Intervene here? Or here?
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Insulation behind lath and plaster
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bonded polystyrene bead
U value improvement 68%
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Calcium silicate board
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Aerogel blanket
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Aerogel with plaster finish
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Interior of tenement, Glasgow
External wall U-value 1.00
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breathable insulated board
U value improvement 65%
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cellulose fibre
U value improvement 71%
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Hemp board
U value improvement 78%
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Wood wool with clay board applied as finishing
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Clay board ready for application of clay plaster
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External Insulation
Maybe not here…
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But what about here?
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Wood fibre insulation, Glasgow
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With 2 coat render system beibng applied
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Negative visual impact of external insulation
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Is it worth lifting this?
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Sheep’s wool pinned to under floor joists
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Hemp board between joists held in place with timber runners
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Stone floors – can this be improved?
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hemp / lime-concrete insulated floor beneath stone flags
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Concrete floors can be lifted and insulated lime concrete floor laid in its place
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Lime concrete layer being mixed, laid and flags laid on top
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Concrete floor insulation: U-value 0.25 W/m2.k
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Should be 250mm thick or more whatever material used
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Dealing with coombes
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Sheep’s wool between joists
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Insulating between rafters using hemp / wool material
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Door panels can be insulated to reduce heat loss
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New insulated door to traditional pattern where original has been lost
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Should you have any enquiries about this lecture, please do not hesitate to contact us by:
Email – [email protected] Phone – 0131 668 8668Website – www.historic-scotland.gov.uk