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DPC level insulating suspended floor

Discussion in 'Building' started by DIYJC, 3 Dec 2015.

  1. DIYJC


    3 Dec 2015
    Thanks Received:
    United Kingdom
    I have a 1980 house that in one ground floor room I am replacing the chipboard floor. While the floor is up I intend to insulate with 100mm Celotex etc, I will do the other rooms as I gradually renovate/modernise.

    The construction of the floor is as per the diagram; a classic suspended floor on bricks on a concrete sub-floor, loads of air bricks, and all very dry which is great.

    To make it airtight it has been suggested that I should expanding foam fill the gap between the end of the insulation and the wall. My concern is that this is across/below the DPC (which is 225mm above ground inside and out)

    I have to protect/duct the air bricks to below the joists I know, approx 25mm of the insulation will be above DPC 75mm below.

    Is it ok to seal to the wall below/ bridge the DPC?

    Thanks in advance for the guidance!

    Attached Files:

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