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MN Renovator · 09-26-15, 02:09 PM

I have some overflow from basement penetrations that went outside my house and its been 3 years. The Great Stuff foam facing the outside got brown, brittle, and flakes off a little bit but its reasonably intact, stronger than I figured it would be. I imagine that with its sun age, if I just hit it with some 120 grit sandpaper or a putty knife I could have it even with the paint and then when I repaint over those spots it would seal and protect the underlying foam just fine and I don't think I'd even know the foam is there. I suppose hindsight I could have caulked those spots from the outside and then foamed from the inside but I don't think it matters that much. None of these spots were big enough to stuff backer rod in place.

09-26-15, 02:09 PM	#5
MN Renovator Less usage=Cheaper bills Join Date: Nov 2010 Location: Minneapolis, MN Posts: 939 Thanks: 41 Thanked 116 Times in 90 Posts	I have some overflow from basement penetrations that went outside my house and its been 3 years. The Great Stuff foam facing the outside got brown, brittle, and flakes off a little bit but its reasonably intact, stronger than I figured it would be. I imagine that with its sun age, if I just hit it with some 120 grit sandpaper or a putty knife I could have it even with the paint and then when I repaint over those spots it would seal and protect the underlying foam just fine and I don't think I'd even know the foam is there. I suppose hindsight I could have caulked those spots from the outside and then foamed from the inside but I don't think it matters that much. None of these spots were big enough to stuff backer rod in place.