Summary: Learn how to tank a wet or damp wall, basement tanking, install a polypropylene membrane and apply an epoxy damp-proof membrane.
Damp patches on an external wall following a period of wet weather could indicate a problem with penetrating damp. Carrying out a technique called Tanking will effectively eliminate the problem. Tanking is a damp-proofing method generally used when it’s not possible to gain access to the outer wall, as with basements and cellars.
There are two methods for tanking walls. The first involves fixing sheets of polypropylene membrane to the wall's surface using membrane clips and joining the sheets together with double-sided tape.
Alternatively, you may choose to apply a two-part epoxy damp-proof membrane or a bitumen-latex emulsion to the floor and walls.
This is effective for areas with a severe damp problem. However, if the problem is very severe it may be necessary to install channels to collect the water and a pump to remove it from behind the membrane. So it is advisable to seek professional help on this.
Hammer the clips into the pilot holes to secure the polypropylene membrane to the wall.
Use double-sided tape to join each sheet, ensuring there is an overlap.
Follow the safety instructions issued by the manufacturer of the epoxy damp-proof product you are using. These will include wearing protective goggles, a respiratory mask and rubber gloves.
Author: C J Mills Google+
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