Martyn Goodram

Fri 15 Nov 2013 04:18pm

Hi Sue, First check outside for any damage that could be allowing water in,such as mortar gaps or cracked render.If this is not the case then rising damp could be the problem, usually leaves a wavy pattern on the wall up to 1m high before gravity sets in.The moisture travels through the capillaries in the brickwork (capillary attraction) like a sponge would soak up a liquid. This moister will bring with it salts and nitrates from the ground that will eventually break down the plaster. The solution is to remove the infected skirts and plaster and install a waterproof membrane before re-plastering. If a membrane is not installed,the fresh plaster will re-activate the salts and nitrates that are still in the brickwork and also allow them to migrate. With this procedure a chemical injection DPC is not necessary but recommended on other walls before damage is caused. Before having any work done,get a survey done to determine that this is the fact, as humidity could be the cause. Hope this helps Regards Martyn

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stephen mulholland

Fri 15 Nov 2013 01:49pm

Hi sue, It is most likely rising damp, a injectable damp proof coarse can be applied from outside , holes are drilled into the wall through to the cavity and injected with the new damp proof , That should solve you problem , any staining on the inside can be covered with a anty fungal wash and stain guard, thanks

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graeme peddieson

Fri 15 Nov 2013 01:30pm

hi Sue i would suggest that you call in one of the approved damp/wet rot contractors from the rated people list,i think this could be a rising damp problem, regards Graeme

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