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Patching pipe holes in the ceiling - getting rid of draft

  • 14-11-2025 09:04PM
    #1
    Fwarder
    Registered Users, Registered Users 2 Posts: 213 ✭✭


    hey guys,

    I have these monumental holes in the ceiling leading to the attic.

    I wanted to pick you brain as to what would be the best way of sealing them all up? PUR foam or a similar sealant? Some fire rated window and door sealant? Polyfilla 😅?

    I'm not sure if there's some "industry standard" way of filling them up but the draft is actually mad so I'd like to get it done sooner rather than later.

    I swear to God these old bungalows are money pits 💰

    IMG_5265.jpeg IMG_5267.jpeg


Comments

  • #2
    Lumen
    Registered Users, Registered Users 2 Posts: 30,511 ✭✭✭✭Lumen


    The standard approach is grommets

    https://www.partel.ie/kabseal-airtight-grommets-sleeves/

    …but they're tricky to retrofit, they're supposed to be applied when the pipe/cable is initially installed.

    For retrofitting to individual penetrations you can use flexible fabric or butyl air tightness tape.

    That big bundle is going to be tricky though.



  • #3
    10-10-20
    Registered Users, Registered Users 2, Paid Member Posts: 9,731 ✭✭✭10-10-20


    PU foam was my treatment method for much of what I patched here. I dont feel too guilty about it in contact with wiring as its not known to react with PVC coatings, nor is it sufficient to cause concern due to the wiring passing through insulation as its only a matter of a few cms deep. You can get fire-rated PU foam too.



  • #4
    Fwarder
    Registered Users, Registered Users 2 Posts: 213 ✭✭Fwarder


    Thanks guys. I went to woodies and bought the soudal gap filling foam. It explicitly said that it was safe for wiring so hopefully it'll be alright 😅

    And if the house goes on fire, a few holes filled with non-fire rated foam will be the least of my worries 😂🔥🚒



  • #5
    monseiur
    Registered Users, Registered Users 2 Posts: 1,721 ✭✭✭monseiur


    Pack the attic insulation around/over ducts when you finish with filling foam. You should have at least 300 mmm insulation in attic.

    Also check plug tops and light switches for draughts, a squirt of foam on top of conduit/trunking in attic (where it protrudes thru the ceiling) will solve this.



  • #6
    Fwarder
    Registered Users, Registered Users 2 Posts: 213 ✭✭Fwarder


    Thanks. It didn't occur to me that the sockets/switches could be drafty as well! While I'm at it, might as well check them 👍



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