We have had a persistent damp patch in our downstairs bedroom ever since we bought our house in the Morvan (10 years ago). Last year we decided to remove the plaster and let the wall breath. On arriving at our place for the first time this year, the wall that we had left to ``breath'', was covered in a brown cobweb -like fungus with a topping of white in places. We brushed this off, but there are stringy bits coming out of the wall, rather like roots. I consulted our trusty Readers Digest book of DIY, and the picture in there indicates we have dry rot. Could someone tell me what the French for dry rot is, so that I can buy the appropriate treatment for it, and also is this a job we can tackle ourselves as we have not got pots of cash to play with !! Many thanks.