My garage is conventionally built of concrete blocks with an asbestos roof. It suffers from a high amount of damp (not just in the winter! I'd apppreciate advice on methods of reducing this problem. I can make a winter project based upon your ideas . In advance, thank you!
Jon.
The damp could be from below, through the mortar joints, through the chrysotile roof, from air blowing through bringing moisture in which condenses on unheated surfaces below the air's dew point - or all the above.
Reducing damp is a continuum. Sealing off the draughts (there are expensive foam pieces if the roof is corrugated and open, plus door seals). Then rubbery-bitumen paint coating the block walls on the inside to stop moisture tracking in. Examining if moisture is coming up from below. Basic dessicant dehumidifier to strip moisture out of the air at low temps, but these cost money to run. Screwing 25mm polystyrene insulation to the walls, or better 25mm celotex seconds (seconds meaning dented, off-size, whatever going cheap) insulation boards.
Jonathon,
Presumably the garage is of single wall construction with no dpc built on a concrete base with no dpm and the underside if the roof is exposed?
Just to kick off, you will have problems with heavy condensate on the underside of the roof, rain penetration from through the walls and risind damp.
Could you be more specific about where the damp is showing?
Cash
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