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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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  1.  
    Aerogel as carpet underlay

    Any thoughts on this
  2.  
    Cost.

    Not sure it would stand up to repeated compressions - may turn to dust? Causing a future hazard (very dusty)
    I'm no expert, but I do have few offcuts. It's very friable.
    • CommentAuthorRobL
    • CommentTimeJan 15th 2024
     
    I've used a bit of Aerogel fleece, trapped inside an external door panel in the past. It was maybe the consistency of a fleece jumper. I too think under a carpet it would squash down locally and some of the aerogel magic dust would come out.
    •  
      CommentAuthordjh
    • CommentTimeJan 15th 2024
     
    Carpet underlay needs to be a relatively stiff elastic and to provide sound isolation (which requires mass) so I'd have thought aerogel was a complete non starter quite apart from the cost.
    • CommentAuthortony
    • CommentTimeJan 16th 2024
     
    Mike tried it and it failed, bumps and humps developed -
  3.  
    Thanks , You've confirm my own thoughts.
    It was clients idea that i thought worth investigating
    Looks like its a floor up, PUR job then
  4.  
    Is it a suspended floor? What about pumping in EPS beads?
  5.  
    considered that,
    Its one room the Q bot sprayer couldn't get under and unfortunately the void is open to the other rooms without and easy way to close off.
    It likely the EPS beads will travel everywhere under the floor
    for those interested in what a Q bot is see https://q-bot.co/
    •  
      CommentAuthordjh
    • CommentTimeJan 17th 2024
     
    Posted By: jamesingramIts one room the Q bot sprayer couldn't get under
    Use a smaller robot to drag a pipe (or just push a pipe by hand) and pump the EPS through the pipe, withdrawing it slowly as they fill the space around the end?

    unfortunately the void is open to the other rooms without and easy way to close off.
    Drill one or more small holes at the edges and squirt PUR in to block them off before starting with the EPS?
    • CommentAuthorcc64
    • CommentTimeJan 20th 2024
     
    I can confirm - not good for under carpet.

    It is pretty good if final finish is, for example, linoleum on corkage on flooring ply. That assembly has less localised 'squish' under footfall so liberation of magic dust less of an issue than under carpet. I did still lap around the edges with some windtight membrane to contain any puffed out - probably not great stuff to breathe in

    Re Qbot I was recently told £1000/m^2 for spray closed cell foam under beam and block. Decided otherwise
  6.  
    https://www.sciencedirect.com/science/article/pii/S0378778817311350
    Interesting detailed study of floor insulated with 100mm wood fibre or full fill eps
    •  
      CommentAuthorfostertom
    • CommentTimeJan 26th 2024
     
    Excellent
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