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i have a chimney breast with a wall mounted gas fire .there are patche

Posted by jackie , on Tue 31 Jul 2012 12:00am

i have a chimney breast with a wall mounted gas fire .there are patches of damp 3 in total no higher than 12 inches rising unevenly from the skirting

Wed 01 Aug 2012 12:00am

This would be ammonium sulphate contamination. Those patches will need treatment against hygroscopic dampness

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