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thank-you fitter, that was more like the answer I was looking for. Breezer, I have a feeling you don't even understand the principal you're criticising. The fluid seeps into the entire brick as the brick is porous and the fluid is applied under pressure. Does it get into the mortar aswell to...

hang on my real interest was in learning how to drill holes in stubborn brick. In the original house there was a physical damp-proof layer (bitumen). Why was this? Presumably to prevent damp rising from the earth up the walls. What happens when/if this layer breaks down? Surely it makes...

apart from this being a side issue to my original query, doesn't the damp-proof fluid fill the entire brick layer?

how so?

my partner is trying, and struggling, to drill into brick so we can inject a damp-proof course. The house is 100 years' old. I think the drill, borrowed from her father, is powerful enough but the bits (£5 jobs, presumably tungsten carbide, from local DIY stores) are being blunted every few...

thanks for the responses, Masona asked the age of the house, it was built in 1901 and we do still have one open fire which we intend to keep. I have since read on one site that sealing is not an option as its laid on earth, and the tiles need to "breathe", and I have also read about musty smells...

we have bought a house which has quarry tiles in the hallway. they appear to have been laid straight on the earth/ lime and on wet days there is damp rising around the edge of each tile. A few "professionals" have said that the floor must be dug up and visqueen laid, are there any alternatives...