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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Housing - Renovation: Anyone have wood fibre exterior wall insulation?

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  1.  
    No intentions of buying expensive boilers, replacing an old woodburner this summer and replacing the oil fired rayburn with a woodburner too.

    The roof is in good shape, nothing needs doing there, and I've recently installed 300mm of insulation across the roofspace so that's pretty well insulated too.

    Wood harvesting and processing will be done by me and is part of my ongoing 'keep fit as I age' program, returning an old woodland to coppice rotation. Very little cost in that other than petrol for the chainsaw.

    You said 'don't settle for less than 200-250mm of insulation', that's nearly a foot ;)

    I'm going through your suggestions and working out what we might incorporate, we also want to keep the 'look' of the cottage, which is pretty important.
  2.  
    I would just go for current building reg requirements - 90mm EPS will reduce you heat loss by around three quarters. After this point huge diminishing return on investment (though many here will disagree)
    •  
      CommentAuthorfostertom
    • CommentTimeFeb 12th 2015
     
    OK Traitor!
    • CommentAuthorMike George
    • CommentTimeFeb 12th 2015 edited
     
    Why? we just have different opinions Tom:cool:
    •  
      CommentAuthordjh
    • CommentTimeFeb 13th 2015
     
    Posted By: mr_magicfingersyou say up stands aren't needed on the cills

    Posted By: fostertom
    Treat render joint to the cill-tops same as you will to the window face - http://www.wemico.com/assets/04307-wemico-brochure.pdf p22 Window frame seal beads - plus a substantial bead of top grade silicone into the controlled-width gap bethween it and frame/cill-top face.

    It's very noticeable on our house that the render in the bottom corners gets wetter than anywhere else. It dries out again soon enough, but I'm very glad that I have got an upstand on the sill buried back in the insulation acting as a second line of defence. The silicone and glued-on stop bead will eventually come unstuck and need repair. I'm happy that the aluminium upstand will last a bit longer and prevent damage until the silcone etc is repaired.
  6.  
    Doing some serious reconsideration. Looking at following some of FosterTom's suggestions, i.e. putting on 20cm or so of insulation on the house and moving windows out into the insulation. Might actually be able to do away with the very expensive heating system and relying on two woodturners, one of which would heat DHW and possibly 2-3 rads upstairs. Internally we'll eventually replaster with earth or lime plaster room by room as we renovate.

    Problem is that we'd have to do all the windows and the insulation at the same time and also find a builder who understands how to install the windows this way. Means putting those upgrades off for a year or two but gives us time to get the woodburners installed and redo the plumbing while we find a builder who can do the windows along with the insulation. I'm guessing that insulation companies don't touch doing things like window installs.

    Tom, any suggestions for Devon builders who understand this sort of install?
    •  
      CommentAuthorfostertom
    • CommentTimeMar 11th 2015 edited
     
    Posted By: mr_magicfingersrelying on two woodturners
    bowling merrily along!

    Posted By: mr_magicfingersany suggestions for Devon builders who understand this sort of install?
    Mike Keefe (exquisitemike@gmail.com) amongst many others I'm sure. Anyway it's not brain surgery - they can be trained.
  8.  
    Posted By: mr_magicfingers
    relying on two woodturners
    bowling merrily along!

    I think it's the heat generated by the treadle action!
  9.  
    Oh the joys of autocorrect :)

    Builders can be trained but, as I've discovered this past year, that's a lot of effort and some expense along the way to get things done right the second time. I would rather find ones that already understand these things.

    Thanks Tom, I'll investigate further.

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