How will foam be affected by a roof leak?
Closed cell foam will localize a small leak and create a waterproof barrier. Water will penetrate through open cell foam. Significant amounts of water will drip through both open cell and closed cell (low density .5lb and medium density 2lb) foams. There is no difference in the ability to find a roof leak with open or closed cell foam. The best way to determine a leak is through thermal imaging or infra-red imaging. Thermacote Systems provides this service.
