Recticel Insulation Board with electric cable resting on it

Discussion in 'Electricians' Talk' started by Matt_H, Nov 7, 2018.

  1. Matt_H

    Matt_H Member

    Hi, I have just finished insulating under our bedroom floorboards.

    I have used 100mm thick Recticel general purpose insulation board.

    However there are electric cables running through the joists which prevented me from just pushing the insulation boards in.

    So I have had to cut into the Recticel where the cables are.

    In some places the cable may be resting on top of the recticel insulation (not the foil as this has been cut off).

    Is this a fire hazard? The cables aren't actually going THROUGH the recticel, it is resting on top of it and above it is a space underneath the floor boards.

  2. chippie244

    chippie244 Well-Known Member

    No it's not.
    Matt_H likes this.
  3. Matt_H

    Matt_H Member


    Am I right in thinking that I shouldn't fill the gaps where the wires drop out of the insulation with expanding foam? I read that this stuff can damage the cables?

  4. Coloumb

    Coloumb Well-Known Member

    Pretty much anything solvent based will damage cables, solvent weld adhesive, polystyrene foam, creosote etc. I don't know about expanding foam but I wouldn't want any of it on my cables.
    Matt_H likes this.

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