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Community and Q&A

Vapor Retarding Coating for old basement salb

DanHines | Posted in Green Products and Materials on

I’m converting my basement to a rental unit and due to head height limitations am planning to leave the old concrete slab exposed.  Due to the age, I’m positive there is no sub slab vapor barrier therefore I’m looking for a coating/sealer that can be put on the old concrete slab that will act as a vapor barrier and be left exposed to foot traffic or have a corresponding final coating that installs over it that can be exposed to foot traffic.  I will be cleaning and grinding the old slab (but its in very good condition for its age) so clear would work but also a tintable coating may be even better.

Does anyone have any suggestions on a product they have used that would fit this use?
Thanks for any help you can give me.

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  1. brian_wiley | | #1

    Christine Williamson had a post on this a while back, which was an epoxy coating. If you scour the comments, she makes a recommendation on a few brands, but says that any good coating with a low vapor permeance that adheres well to the concrete should work.

    The post can be found here:

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