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    Underslab insulation


    I am planning to build 3.6x6x2.5m SIP board garden office on top of the concrete slab floor without foundation wall and feeting. Concrete slab floor will placed on top of the insulation. Can anyone recomend me the best underslab insulation material/product with high compressive strength and U-value take on heavy weight of whole garden office without foundation wall.

    Asked by Oto on 5th Dec 2020
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    Best Answer

    Hillview services

    "I would recommend Kingspan or Celotex.

    Celotex is a lot cheaper though and just as effective"

    Answered on 29th Dec 2020 - Member since Jan 2020 - report
    M Darbyshire Building.

    "The product would be either "KINGSPAN" OR CELLOTEX.
    Both products will do the job. These products are used in extension floors. It is a point load situation. The sheds weight will be spread over a large area. 150mm of concrete would be ample. Hope that helps."

    Answered on 8th Dec 2020 - Member since Jan 2019 - report
    Sonata carpentry construction co.

    "150mil Kingsman and fill what ever joints with expanding foam"

    Answered on 4th Jan 2021 - Member since Aug 2018 - report
    A.P.S Build solutions LTD

    "Hi it’s definitely got to be Kingspan I’ve used it so many times it’s never had any problems plus make sure you use mesh with spacers"

    Answered on 8th Dec 2020 - Member since Aug 2020 - report
    L&A Courtings

    "100mm jabulite 8x4 boards strap 4x2 timber to make solid and then 8x4 1" ply and finish with your choice of flooring"

    Answered on 17th Jan 2021 - Member since Mar 2019 - report

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