Discuss Damp proofing concrete floor in the Canada Tile Advice area at TilersForums.com.
Cheers for the response.Houses of this age are not designed to have damp proof floors and you could end up doing huge amounts of damage if you are not caareful. Firstly is it modern concrete i.e. made with cement rather than lime. Is there a polythene damp proof membrane underneath it... I hope no but sometime bad things are done in the name of improvement. If not then you have rising damp which a liquid dpm is not designed for anyway. Personally would look for breathable systems like they use a lot in Italy where the buildings are often very old. If you have to damp proof I would look at ditra rather than a liquid system. At least this would allow movement of moisture vapour offering less damage to the building.
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