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Air Infiltration

I was plugging a CAT-5 wire into a wall outlet and felt a draft. As I wondered just how much air this really is leaking through my walls, I concocted this little experiment. Try it yourself, unless your home is insulated with spray foam, and then you'll have exactly zero air leakage! Part of my attic and all of the floor is insulated with Sealection 500 from Demilec. The photo of my roof shows the clear division with foam on one side and fiberglass batts on the other. Even though the foam is a lower R-Value, it holds the snow while the fiberglass side lets the snow melt. Spray Foam Works!