Laminate Flooring on Enclosed Deck

Discussion in 'Remodel Forum & Blog' started by prashster, Dec 28, 2006.

  1. prashster

    prashster New Member

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    My uncle has a sunroom that is basically an enclosed deck. The floor is slatted deck boards, open to, and elevated from, the ground.

    He wants to put a finished floor on there. What are the best options?

    I suggested a polyethylene barrier over the deck, followed by rigid insulation, then possibly a plywood underlay and finally laminate flooring. Would that work?

    Would cement backerboard be a better choice?

    He received counsel from a flooring guy that laminate is a bad choice in that room because of the climatic changes (it's unheated and uninsulated). But if you can do laminate in a basement, why not in such a room? He'd insulate the floor...
  2. Bob NH

    Bob NH In the Trades

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    A basement is very constant temperature, so there is very little expansion and contraction.

    I would consider some kind of carpet. That is very tolerant of things that would damage laminate or other smooth finish floors.
  3. prashster

    prashster New Member

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    941
    Thanks, Bob. What's the best way to insulate the floor?
  4. Bob NH

    Bob NH In the Trades

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    3,317
    Location:
    New Hampshire
    First, figure out how much thickness you can stand.

    Then, I would used a layer of rigid foam, with waterproof facing on the top side or both sides. It needs to have a layer of material that will prevent punching through.

    You can use foam padding under the carpet which will insulate some, if you want that kind of carpet. If you use a more casual carpet without padding, then the foam is the best insulation and you probably need 3/8" of decent plywood for underlayment. I would not rely on 1/4" luan to resist punching a chair leg through to the foam insulation.
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