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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Comment by Greg Labbe on December 12, 2013 at 1:53pm

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.