damp area mystery

M

marsaday

My mum has a hot air heating system.

Under neath the vent in the kitchen dining area the wallpaper underneath the vent is very loose on the wall. also the skirting board is flaking underneath as well - or the paint is.

We think this is something to do with the vent, but cant work out what is happening. any ideas?
 
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If no signs or rising damp (ie the damp is solely below the vent not along the wall) then this is condensation, related to when the metal duct cools

Sometimes you find that the duct is not built into the wall properly and there are air pockets in the wall

Also, loose paper and flaky paint is related to the sheer heat which comes out - more so if this register is close to the boiler
 

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