How to Protect Old Brick Before Applying Spray Foam Insulation?
Hello everyone! I am planning to apply spray foam insulation to the inside of my exterior walls. (I live in an old brick rowhome in Philadelphia.)
There is a lot of mixed or contradictory info out there on the best way to protect old brick while insulating. Similarly, lots of mixed info on the effects of spray foam insulation applied to the interior.
My main questions…
-Should I do anything to prep the old brick walls before applying the spray foam, e.g. parging?
-Do I need to retrofit weep holes (currently there are none) or do something else to allow ventilation?
-Is spray foam on the inside totally the wrong way to go? Should I apply to the outside and add siding over it? (Would prefer to avoid this extra difficulty and cost)
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