Contractor vs Martin Holladay –
As Martin and Dana and others have written on this site, it is not recommended to leave a gap between a brick wall and foam insulation, because mold.
A waterproofer says he will install [dimple board], and I can spray foam on top of that. He says mold won’t happen because mold doesn’t grow on brick or plastic. Sounds right, but seems to conflict with Martin who said a gap behind rigid foam would be a problem.
What am I missing?
There would be some kind of “weeping tile”. I imagine water sitting in the trough, making the area humid.
(There is no detectable source of water penetration, but it’s clear some water has come thru in the past.)
Double brick, house > 100 years old.
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