Its 2 inches of air space not 2 inches of foam. Depending on the size of
the rafters you would get 6" to 10" of foam.


Well, it will work, but it will only be 2 inches. That may or may not
be sufficient to fix the problem. In Northern NY I would think that only
2 inches even icynene would be minimal at best. It is possible to add
more above the current roof or below. I would want a second opinion from
someone in the business in the area. It just seems like you may regret
not doing more.

--
Joseph Meehan

Dia 's Muire duit