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Filling large gap in wall

Discussion in 'General DIY' started by dan1w, 24 Jan 2020.

  1. dan1w

    dan1w

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    In my garage conversion a wall was built forward of the existing wall to keep the gas meter and CU in situ and also create a single flush wall rather than having a cupboard jutting out.

    There is a draft from the cavity and I want to seal around it. I’ve tried using expanding foam but it just falls off as the gap is too large. I could build it up in layers but that would take a while.

    I’ve noticed screwfix do a ‘sticky’ foam and was wondering if this might adhere better to the wall? Any other ideas?
     

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  3. foxhole

    foxhole

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    You could just jam in bit of insulation in the gap and infill with expanding foam .
     
  4. JobAndKnock

    JobAndKnock

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    Decorators centre should be able to sell you some expanded polythene foam "cord" (available in sizes up to 75mm) to fill most of the gap (used to fill gaps before caulking), foam to finish. Alternatively stuff some chicken wire or expanded metal (aluminium mesh) into the gap and then foam it. May take several applications but the "stuffingg" gives the foam extra supportpp
     
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