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Cedar or PVC as threshold

arnoldk | Posted in General Questions on


I need to raise my front door by an inches because the slab that was poured in spring of 2022 is not level with the foundation. This does not leave me much room to install the finish flooring without not being able to open the door.

I will remove the door and install 1 inch (5/4″) threshold on top of the foundation and reinstall the door on top of that. Is it better to use PVC or cedar board?

Thank you,

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  1. Expert Member


    PVC or pt wood. Cedar is both soft, and despite its reputation doesn't do well in confined spaces where it may get damp.

    1. arnoldk | | #2

      Good point on the softness of cedar. Any issues with sealant for PVC against concrete?


      1. Expert Member
        BILL WICHERS | | #3

        I've used good quality silicones before with no problems. I suspect you could use polyurethane too, but I haven't tried it (if you tried it, just put a test blob on some scrap PVC first and check that it doesn't do anything to the PVC). The masonry won't care what sealant you use, it's only the PVC that could potentially react with the sealant.


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