As it obtains moisture, insulation loses significant R-Value as well as efficiency. The general estimation for this is a 2.5% decline in R Worth for each 1% boost in insulation dampness content. Apply POISE ICE & WATER GUARD ® underlayment in reasonable weather condition when the air, roofing system deck, as well as membrane layer go to temperatures of 40 ° F( 5 ° C)or greater. Apply roofing covering