Common Causes of Damp.
Common causes of damp include missing or blocked guttering and missing or loose flashing or roof tiles. Flat roofs can also lead to leaks and damp because they’re only watertight if properly sealed. If you think your home has any of these problems, you can tackle them yourself, although it’s often better, and safer, to get a builder or roofer in.
If your home’s damp-proof course is being prevented from doing its job, this can also cause damp. You should be able to see the line of the damp-proof course along the exterior of your home (several inches up from the ground) and if the level of your garden, patio or path is higher than the course, it won’t work properly, so make sure this isn’t happening anywhere.
Another cause of damp could be your home’s exterior walls, so check those over. Common problems include deteriorated pointing, deteriorated or cracked rendering, and bricks that have become porous. Again, you can often fix these things yourself, or you may prefer to get a builder to do it.
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