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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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    • CommentAuthorMarkyP
    • CommentTimeMay 8th 2017
    My extension includes a single skin blockwork walled off stairwell acessed from the main house side. The extension slab sits some 600mm lower than than main house FFL. The stairwell floor slab is at the same lower level as the extension even though it is only accessed from the main house. Original design included steps down from main house into the stairwell, but on reflection it seems silly to have to descend a few steps in order then to ascend the main stairs, better I think would be to walk into it at the same FFL as the main house. So how best to raise the subfloor level? Was thinking cheapest and quickest would be several layers of EPS boards up to about 500mm topped off with a sand/cement screed and then finish floor covering?
    • CommentAuthortony
    • CommentTimeMay 8th 2017
    Yes, fine, a few joists and flooring might work out cheaper, where awre the insulation barriers?
    • CommentAuthorMarkyP
    • CommentTimeMay 8th 2017
    thanks, Tony.

    the plan was insulation over the new slab, then screed. But looking at ways to make up more height in the build up. Joists and chipboard might well work out cheaper as I wouldn't need to get the stairwell floor screeded and I've got the timber I'd need in left overs and offcuts from the roof framing. It would create a subfloor void, I wonder if BC would want to see this ventilated? I could fairly easily vent it to an adjoining room with a couple of grilles through the wall into an adjoining room.
    • CommentAuthortony
    • CommentTimeMay 8th 2017
    Would it be possible to use it as a storage space?
    • CommentTimeMay 8th 2017
    I'd think it was simpler to build up the height with EPS as suggested and then its a straight choice between a screed or battens and chipboard on top?!
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