This Deep Energy Retrofit had spray foam installed in a 100 year old house. The foam was the air barrier and insulation, but like all good things if not inst...
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This only gives the homeowner that sick feeling but how often do we building scientist types have to harp on this message:
No pot [can] lights on any top floor ceiling.
If you know a contractor who does DER, cares about performance show them this video.
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