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Insulation spray foaming a floor from underneath

  • 10-10-2021 4:55pm
    #1
    jay0109
    Registered Users, Registered Users 2 Posts: 2,671 ✭✭✭


    Is it possible or has anyone had it done, whereby a floorer went into the large cavity below a suspended floor (via lifting a few floor boards to allow access) and spray foamed the underside of the floor boards? Rather than having to lift all the floor boards and spray foam which would be a considerable body of work in my house.

    Is such a method even possible or advisable?



Comments

  • #2
    GreeBo
    Registered Users, Registered Users 2 Posts: 27,370 ✭✭✭✭GreeBo


    You'd need a pretty deep cavity to make it feasible, the Americans often have deep "crawl spaces", what sort of depth are you dealing with ?

    Thats before you even look at why type of foam (open/closed) as suspended floors need air due to the area being (potentially) damp.



  • #3
    jay0109
    Registered Users, Registered Users 2 Posts: 2,671 ✭✭✭jay0109


    https://www.boards.ie/discussion/comment/118043739#Comment_118043739

    I'd take it that open foam would be used if there was dampness or the potential of dampness?



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