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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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    • CommentAuthorrevor
    • CommentTimeNov 13th 2021
     
    Need to fill voids around and under ufh pipes where they loop around the ends in a battened floor installation. As very messy to rout out the shape of the loop thought would use vermiculite or poly beads to backfill. The straight lengths is rigid PIR. Any views anyone.
    • CommentAuthorMike1
    • CommentTimeNov 13th 2021
     
    Vermiculite is fire-proof but easily absorbs & retains moisture, polystyrene good to around 75°C. Presumably you're running low temperature UFCH, so out of those two I'd choose poly beads.
    • CommentAuthortony
    • CommentTimeNov 13th 2021
     
    The risks for vermiculite are too great were it to get wet,
    •  
      CommentAuthordjh
    • CommentTimeNov 13th 2021
     
    FWIW, I'd think that perlite was a better choice than vermiculite.

    But given that I, along with everybody else, favours EPS then it's a choice of which is second best.

    If there's already PIR there, then flammability and plastics have already been considered, so I don't understand why vermiculite was considered at all?
    • CommentAuthorrevor
    • CommentTimeNov 14th 2021
     
    Posted By: tonyThe risks for vermiculite are too great were it to get wet,

    It is a suspended first floor installation floor battened out 38 mm at 400 mm centres insulation in void pipes clipped to battens. Not in a bathroom or any whare there is water. If it got wet then I would have a much bigger problem on my hand.

    Posted By: djhIf there's already PIR there, then flammability and plastics have already been considered, so I don't understand why vermiculite was considered at all?


    A previous room I did I routed out the shape of the pipe loops in the PIR but it was messy and even though was properly geared up the fine dust generated was hazardous in my opinion, so was looking for an alternative to do the loop ends of the pipe.

    Have since considered the green aspect but guess there is little difference in their green credentials
    • CommentAuthorbxman
    • CommentTimeNov 16th 2021
     
    Petlyn must have sold all his Expanded Glass Beads or he would have been here by now
    • CommentAuthortony
    • CommentTimeNov 16th 2021
     
    UFH pipes sounds like risk of water to me
    • CommentAuthorrevor
    • CommentTimeNov 16th 2021
     
    Posted By: tonyUFH pipes sounds like risk of water to me


    If that goes then have bigger problem than vermiculite getting wet It is only the loops getting filled in 15 loops X approx 2 litre of fill. Pipes are pressure tested to 6 bar overnight before filling well above running pressure.
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