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Discussion Forum

Cracks in concrete on wood floor

FLSeminarian | Posted in General Discussion on June 24, 2022 02:21am

A client has a TV room with concrete over wood flooring. When they bought 20 years ago it had glued-down carpet over it, which they removed and dug out most of the mastic out of the cracks that had formed over the years.

Now they want to clean out the rest of the cracks and fill them, and refinish the surface. Mrs. Client has had some tile work done around that room’s fireplace, and wants to use the same grout in these cracks. We’re in the Palouse section of the Pacific Northwest, with huge annual swings in humidity. I am concerned that the effects of those swings on the wood substrate will either cause the cracks to widen further, or narrow and crush the grout, depending upon where you are in the humidity cycle.

I’m thinking about using a color-matched sanded caulk.

Thoughts?

Sorry. No pictures. And it’s too bad, because it’s a really cool craftsman home.

Thanks for any input.

Reply

Replies

  1. florida | Jun 24, 2022 09:55am | #1

    In another life I'd love to have a Craftsman home. They are very warm, friendly houses. We have some here in south Florida but as it always the case they are in poor neighborhoods now.

    But, I'm confused. Do they have wood floors with concrete on top? Did they remove the concrete? I'm confused as to where your customer wants to use grout.

    1. FLSeminarian | Jun 24, 2022 10:55am | #2

      That is why I am sorry I don't have a picture.

      They have a room with a wood floor with concrete on top.

  2. User avater
    tfarwell | Jun 28, 2022 12:15am | #3

    First and foremost - Go Cougs! (I'm a Beav myself)

    I would consider a high-strength, poly-fortified repair mortar. My garage floor is 4" of concrete on a wood floor, it seems pretty stable after 17 years. I'm over by Portland - not quite as dry as you all get.

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