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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.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

Buy individually or both books together. Delivery is free!


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      CommentAuthordjh
    • CommentTimeAug 15th 2023
     
    Yes, as Brian says, watch the groundworks costs carefully. I think screw piles themselves can be fairly cost effective. We managed to get a fixed price contract for the groundworks, from a family-owned firm where one of the sons was keen to get into the 'green building' business. He got us GGBS concrete, mixed on site to minimise waste, which happens to be available locally. Couldn't get any bids for the house itself though, so I ended up managing the trades myself.
    • CommentAuthordovemw
    • CommentTimeApr 15th 2024
     
    Good evening, I have been quiet on this. We followed the advice and are now working with Build Collective. We have had delays for various things but we have the timber frame ordered and it's design pretty much completed and once we got the loads BC were able to develop the foundation design further. A flat raft does not work for us (timber frame loadings due to various aspects of our design and also the clay strength) so we have 150mm with a big thickening at perimeter and across the centre. We are currently optimising location of our GF WCs and SVPs to miss the thickenings where possible and any other cutouts or penetrations in our slab. Our power supply and water will come in via the attached garage and we need to decide if we take these through the slab or at GF ceiling level as there is an open passage between house and garage but garage roof butts up to the house. On a passive house is it better to bring in services through the slab than elsewhere?
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    We are coming up through the slab with services. Water, electric duct, tv aerial, and also a pipe each for hot and cold water to pass under the central hallway from utility room side to kitchen side (shortest route possible)
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      CommentAuthordjh
    • CommentTimeApr 16th 2024
     
    Glad you've got your slab sorted. Ours is quite complicated underneath as well - lots of ribs and thickened bits as well as a separate ring beam around the edge.

    All our main services come up through the slab in ducts - water, electricity, communications. It makes things a bit simpler. We do have a few things that go through the wall at GF ceiling height - the solar PV downfeed, a feed for an outside tap, and power for an outside socket etc. Each penetration has to be sealed of course, but I'm happy with our supplies all being safely underground.

    All our waste pipes go down through the slab; they all have air admittance valves. We have an SVP but it is completely outside the house (it just looks like another rainwater downpipe). This avoids any issues of cold external air inside the house.
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