There is a potential issue with the nails commonly used to install roof shingles. The coil roofing nails currently being used by nearly all roofing contractors are Electro-Galvanized (EG). ETC specifies Hot Dipped Galvanized (HDG) or stainless nails. The manufacturers state that EG nails should not be used on treated lumber and Fire Retardant Treated (FRT) is one type of treated lumber. Multiple suppliers have stated that HDG coil nails are not a stock item and are not readily available for purchase. We are awaiting further information which we will post on our blog. This could be a significant problem, so please check your projects to see if the specified nails are being used, particularly if you have FRT. Please let us know if we can help!