Damp Proof and cavity wall insulation


Postby Rachin » Tue May 05, 2009 9:58 am

I have had a damp proof done on the lower floor of my house am I ok to have cavity wall insulation done?
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Postby stoneyboy » Thu May 07, 2009 8:14 pm

Rachin,
Houses needing a DPM are generally pre war and do not have cavities - are you sure you have a cavity?
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Postby Rachin » Fri May 08, 2009 6:11 am

My house is 1930ies ex council other houses of the same type have had the cavity wall done. I was wondering does the cavity wall insulation have an adverse affect on a damp proof course?
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Postby stoneyboy » Fri May 08, 2009 8:36 pm

Rachin,
If there was a need for a DPM to be installed the chances are that this will not totally stop rising damp. The only potential problem will be that once the cavity is filled the walls will only have one surface for evaporation of trapped moisture to escape.
Have a word with your neighbours who have had their cavity filled and see if they have any damp problems.
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Postby thedoctor » Fri Oct 25, 2013 8:55 am

For readers looking for related advice please see our cavity wall how to projects which has a bunch of useful articles and information on damp issues and fixes, vertical Dpc, insulation of cavities, cavity trays and lintels and pumped cavity walls.
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