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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.

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    • CommentAuthorcczmark
    • CommentTimeSep 24th 2018

    My builder has installed steel beams over 2 patio doors. This is 2x I shaped beams bolted together rather than one single beam. Plus a beam that connects into it. I don't have the option of insulating between the beams.

    These will have some sort of fire protection board (?Fire-rated plasterbd) applied to them.

    Q: Seems to me I am looking at lots of cold-bridging here. What insulation options do I have? Without falling foul of fire regs...

    Builder says I can apply some insulation to the beam web with no problem (probably just stick some EPS to it...)

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    • CommentTimeSep 25th 2018
    Sorry, but it's not clear to me where the two patio doors go and which are the two beams bolted together that you are referring to. Perhaps a drawing would help, or some more photos.

    Who designed this building/extension? Are there no construction drawings showing what was intended that have been signed off by you?
    • CommentAuthortony
    • CommentTimeSep 25th 2018
    I would add insulation between the head of the new doors and the steel and then outside the outside one and in the outside web, and over the top of it, all with sheet insulation, effectively bring the steels inside the thermal envelope
    • CommentAuthorgyrogear
    • CommentTimeSep 25th 2018
    I would even insulate the transverse beam also.
    Not forgetting 2 x thicknesses of plasterboard over the insulation.

    • CommentAuthorowlman
    • CommentTimeSep 25th 2018
    @ Dave
    I think they are 2 x " L " beams back to back not an "I" beam.

    It surprises me why, generally, people don't use Glulam and save much of the insulation problem. Fixings for suspended sliding doors etc. are dead easy.
    I met someone the other day doing something similar to this and had never even heard of Glulam. I guess he wasn't that interested in insulation either.
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