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Floor insulation - hold in place?

Discussion in 'Wood / Woodwork / Carpentry' started by markyyyyyy, 5 Feb 2020.

  1. markyyyyyy

    markyyyyyy

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    another question regards my timber frame base for log cabin

    what is the cheapest and most effective way to secure 70mm celotex insulation board inbetween the floor joists - there will be a void underneath as it's a timber frame resting on pads, so i obviously dont want the insulation to fall through.

    i am using 2x4 joists set @ 400mm centres if that makes any difference

    Was thinking a couple of nails put into the side of joists with a cm or so protruding to stop it falling through? would that work?
     
  2. Notch7

    Notch7

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    I used small timber battens 32 x 15 or similar - I screwed them in place before laying the joists.
     
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  4. Djangobanjo

    Djangobanjo

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    I put trellis poles (anything will do, I just had loads spare) perpendicular to and under the joists so i can use the full height of the joist. Any gaps between insulation and joists filled with foam that helps fix it in place too.
     
  5. foxhole

    foxhole

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    I just tap a couple of nails in either side and tap insulation in place holds very firm.
     
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