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Green Building Bible, Fourth Edition
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Housing - Renovation: Finding an Energy assessor

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  1.  
    • CommentAuthordazdread
    • CommentTimeOct 21st 2020
     
    Hi there,

    I am looking to see what interventions I need to make on my 1900 end of terrace to uprate its thermal performance with a view to getting off gas onto a low carbon renewable heating source.

    I have been looking and cannot find any online and I have also checked with the Cheese project and CEE to no avail. I am based in south Leicestershire in the East Midlands and if anyone knows of a local assessor or database of assessors that would be great.

    Many thanks.
  2.  
    It's really hard. There simply are not enough throughout the country! You intrigued me as to what the Cheese (C.H.E.E.S.E) project was!

    Do you own the land beyond your gable wall? What I am getting at is can you externally insulate (EWI)? Is there a loft, or an attic bedroom, and if the latter, is it original from 1900 or a conversion? Could you EWI your house and stop at the neighbours'?

    http://files.site-fusion.co.uk/webfusion58199/file/2015_bristolsolidwallinsulationguidance.pdf gives some useful ideas, but it's only one school of thought. The suggestion of max 60mm wood-fibre internally is prudent but potentially, depending on the degree of exposure, perhaps a little too cautious. I have never used more than 100mm, and would recommend a dynamic condensation risk analysis (WUFI is one) to assess the suitability of greater thicknesses than 60mm for your house.
  3.  
    Posted By: dazdreadI am looking to see what interventions I need to make on my 1900 end of terrace to uprate its thermal performance with a view to getting off gas onto a low carbon renewable heating source.

    I do not understand why you need to upgrade the thermal performance of the building to get off gas! It is just as valid to upgrade the thermal performance if you stay on gas.

    The implication of your statement is that there is no need to upgrade if you stay on gas or/and you need to upgrade before you can move off gas. You can go off gas to say a heat pump or solar as the house is, you just install bigger units. But most would think this a waste but don't think twice about replacing their 30kW gas boiler like for like. Of course the economics of installing an over size heat pump to compensate for a poor thermal performance is much more than a new gas boiler - hence the driver to improve insulation.

    IMO the economic approach (and perhaps the environmental one too) would be to upgrade to reduce gas consumption to a minimum practical level and stay with gas until the end of life of the boiler and then change, by which time technology would have improved and cheapened the alternatives anyway.

    Rant over
  4.  
    Not so close to you but try Gil Schalom, architect, in Nottingham. He has been involved with a couple of EnerPHit or near-EnerPHit refurbs, including this one: http://www.superhomes.org.uk/superhomes/aspiring-superhome-nottingham-west-bridgford-harrow-road/. If he cannot do the survey he may well know someone who can. He's the nearest I can think of at the moment, but I'll come back to you if I think of anyone else.
    • CommentAuthordazdread
    • CommentTimeOct 22nd 2020
     
    Hi there,

    https://cheeseproject.co.uk/ for the Cheese project

    I wanted to EWI the house but the North wall is a narrow alley so 15 years ago I did IWI with EPS and suspect there might be some damp in the joists... hence wanting a proper inspection.

    I only have a small Eastern facing roof as the house runs East West and is the North side of a pair, I might get some solar PV on my double garage which has a Southern aspect.

    Having a non-condensing near end of life gas boiler the economics are probably there but I wanted to be efficient as well as off gas hence looking to see what interventions I can make.
    •  
      CommentAuthorDamonHD
    • CommentTimeOct 24th 2020
     
    Hi,

    My house like yours is hard against an alley on its north side. My house is wood frame.

    In the end I went for aerogel IWI, by degrees.

    I alsio have east- (and west-) facing PV. A mixture of south-facing and something else (though preferably west) is good as its spreads out the generation curve and will match some demand (yours and the grid's!) for a longer chunk of the day.

    Rgds

    Damon

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