I had the icynene insulation system installed in my home about one year ago. I installed a 1500 sq ft addition to my 1500 square foot home. I framed the new walls with 2" x 6" studs, Removed the plaster on existing exterior walls and had real 2' x 4" studs. The icynene was applied to 5 1/2" deep on new portion of the home and 4" on existing portion of the home. The 2 x 12 roof rafters cavities were sprayed to about 8 to 10 inches thick, my vented soffits were in effect sealed shut and it was applied direct to underside of roof sheathing. The basement and crawlspace was sprayed to about 6 to 8 inches.

Well as i said a full heating season has passed since the insulation was applied. My heating bill this season is $400 dollars less than last year but last year I was only heating 1500 sg ft this year I heated 3000 sq ft (same boiler).

The unfinished attic approx 1500 sq ft remains only about 4 degrees cooler than the rest of the home, that was a real valued Bonus.

I own a construction co. in New York City and my home is on Long Island NY. I really rec"d this product. As far as the shingle lifespan being shortened I am not really concerned, try walking on a roof on a 90 degree day, the roof will stick to your shoes I don't think a couple degrees warmer is going to change the lifespan, as far as warranty goes it is alot warmer in Las Vegas than where I
am so I'm sure something could be resolved. But I never had to replace any roof for warrenty and I don't think I'll have to now. I believe this product has been around for 20 years.
It is important to vent baths and cooking areas though.
I would rec'd this product.

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