Q: The TruSlate® Premium Roofing System is lighter in weight than a traditionally installed slate system. Are the slates thinner than traditionally installed slate?
A: No. In fact, at 1/4” to 3/8” our slates are comparable to traditionally installed slate. Our weight savings comes from the length reduction. We have cleverly eliminated the wasted slate (i.e., the part you never see) and replaced it with an ultra-tough waterproofing material (UnderBlock™ UV & Moisture Barrier). In short, what you see is real, genuine slate. What you don’t see, isn’t.
Q: What is the ultra-tough material and is it durable?
A: UnderBlock™ UV & Moisture Barrier is a specially blended high density polyethylene (HDPE). HDPE is widely known for its durability and is commonly used as a geomembrane for landfill liners and pond liners. It has also been used for decades as a covering for telephone wires and electrical cables. When exposed, properly blended HDPE has shown exceptional resistance to weathering, freezing, and stress cracking. Experts claim that when exposed, it should last for over 100 years. When covered (as in a landfill or with slate) it should last for hundreds of years.
Q: How is the UnderBlock™ UV and Moisture Barrier attached to the slate?
A: It’s not bonded to the slate. It’s simply installed under each course of slate.
Q: What type of roof deck protection is recommended?
A: We recommend Deck-Armor™ Roof Deck Protection, a tough, breathable, non-asphaltic product.
Q: What type of roof deck protection is recommended for Class A fire protection?
A:For UL Class “A” fire rating, use VersaShield® Fire-Resistant Roof Deck Protection in combination with an approved GAF Roof Deck Protection or GAF Leak Barrier product.
Q: What is the ASTM C406 rating on your slate?
A: All slate colors in the TruSlate® Premium Roofing System have achieved ASTM C406 S1 rating, as tested by independent and accredited laboratories.
Q: How does GAF ensure the quality of its slates?
A: Beyond typical ASTM C406 testing, GAF tests its slates to various parts of European standards and conducts comprehensive chemical and long-term testing. Much of this chemical and long-term testing is unique to GAF within the slate roofing industry.
Q: Where does your slate come from?
A: We offer only slate quarried in the United States and Canada. Our slates are selected on both quality and availability. As a natural stone, certain quality, colors and textures of slate can only be found in specific locations.