Quote:
Originally Posted by kkingston57
Be careful especially if you have an asphalt shingle roof. Sun heats up the roof and foam insulation will create a lot more heat between the roof and the foam insulation and could cause damage to your roof. Also if you have a small roof leak you will never know it since the water can not go through the foam. Check with a roofer. Friend in S. Florida had it and it worked great but problems I cited MIGHT occur later
|
Both the scenarios you describe occur when foam is installed incorrectly.
It shouldn't touch the sheeting. There should be baffles in place to allow air movement between the foam and sheeting so the ridge cap (ridge vent) and soffit can move air as intended.