Damp garage floor.. What are the options?

6 Nov 2013
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United Kingdom
My house was built in the 50s and it looks like there is no damp proofing in the garage because in the winter the floor is very damp to the point of being wet.. It looks like previous owners have tried to stick down some felt to the floor but this has pretty much fallen apart and just a few bits left.. The floor is quite "crumbly" in places too, I guess from years of being wet..

What are the most cost effective options to solve the problem?
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The first thing is to check to make sure that surrounding soil is not higher then the base. If it is, dig a channel around the garage to a depth lower then the concrete base. Lightweight garages suffer from condensation, is yours? and the dripping water is wetting the base. If its just a case of poor concrete without a DPC then some surface treatment could be tried.
Hi Frank, The garage is blocks and plaster on the outside with an asbestos roof.. I don't remember seeing it dripping anywhere but that's not to say it didn't over night and I looked in the day when it had stopped..

I will check the soil hight and if necessary dig it down..

What surface treatments are there? What would you suggest?
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Rubberised paints, Bitumen products, SBR loaded with cement used as a paint, Polyurethane based sealant,. . . . . No doubt others are available. Just a word about Bitumen based products, they stay sticky so need over coating with something. Ya pays ya money and you take ya choice. If you use Google and find something that seems OK, put a query up here perhaps someone will give you the low down on how it performs.

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