What is the required dry time after the solar board gets wet from rain (moisture) when it is installed on the rafters and ready for shingles to be installed. We do not want to trap moisture. Please advise the length of dry time. I have been forwarded from the website: “Solar board on roofs”. thanks,
John Baker, Oklahoma
Thank you for your e-mail John. If you get SolarBoard roofing panels wet, then wait for them to attain 15 to 18% moisture content. As a rule of thumb, in approximately 3 days of no rain the board should be ready for roof covering material. If it is going to be a rainy period you may want to felt it in to help retard some moisture and make sure the board is good and dry before shingles are applied.