TruSlate Slate Roofing
|            TruSlate Home
|            Learn About TruSlate
|            TruSlate Colors
|            TruSlate Photo Gallery
|            Compare to Other Options
|            Frequently Asked Questions
|            Install Guides & Documents
|            Standards & Code Approvals
|            Warranty Information
|            Find a Contractor
|            Sales & Architectural Inquiries
|            Contact Us
|            Privacy Policy
|            Visit GAF.com
|            En Espanol
|            En Francais
  Virtual home remodeler

















 

Frequently
Asked Questions

Slate Nails
Q: Is TruSlate® real slate?
A:

Yes. Our slates are genuine, hand-split quarried slate.

Q: Why does the TruSlate® Premium Roofing System cost so much less than traditionally installed slate?
A:

It’s simple: we’ve eliminated the wasted slate needed for a traditionally installed slate roof. Less slate also means less weight, so expensive structural modifications are typically unnecessary. Another advantage is it’s easier to install. Our unique hanger system makes installation a breeze, even for a contractor who has never done a slate roof. In fact, it's typical for our roof system to be installed for less than one-half of the cost of a traditionally installed slate roof.

Q:

If only select components of the TruSlate® Premium Roofing System (such as the TruGrip™ Battens and Hangers) are installed along with non-TruSlate® products, what is the warranty coverage?

A:

There is no limited warranty coverage in this case. All
TruSlate® system components, as specified in the TruSlate®
Ultimate Pledge™ Ltd. Warranty
or TruSlate® Smart Choice®
Ltd. Warranty
, must be installed as a system in order to qualify
for limited warranty coverage.

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.

tranparent
Q: What type of roof deck protection is recommended?
A:

We recommend Deck-Armor™ Roof Deck Protection, a tough, breathable, non-asphaltic product.

tranparent
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.

tranparent
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.

tranparent
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.

tranparent
Q: Where does your slate come from?
A:

We offer slate from around the world, including a host of colors from the United States and Canada as well as select colors from China and other countries. Our slates are selected on both quality and availability. As a natural building product, certain colors and textures of slate can only be found in specific locations around the world.

tranparent
Q: Why are your domestic-quarried slates more expensive?
A:

These high-quality slates feature some of the most unique and sought-after natural slate colors and textures in the world. Quarried at select New England locations renowned for their exceptional quality standards, the slates have been installed for over 100 years on countless distinctive properties and fine homes across America. Their premium price and position in the market is also related to the rather limited supply and production capacity of roofing slates in the United States. We’re proud to offer these proven-quality slates — you won’t find a more affordable domestic-quarried slate option for your roof anywhere else.

tranparent
Q: Can my roof support the TruSlate® Premium Roofing System?
A:

In most cases, as long as your roof meets code, it will support a TruSlate® System (on average about 550 lbs. per roofing square). However, we suggest that you check with a qualified roofer, architect, or engineer to be sure you don’t need additional support.

tranparent
Q: Can I install over asphalt shingles?
A:

No. The asphalt shingles would need to be torn off to provide a clean deck surface.

tranparent
Q: Is there a maximum or minimum sloped roof that
TruSlate® can be installed on?
A:

Yes. You should not install TruSlate® on slopes of less than 4:12. On slopes of 4:12 up to and including 5:12, a GAF-approved waterproof leak barrier membrane must be applied to the full roof deck.

tranparent
Q: Can I walk on the slate to clean my skylights?
A:

With proper instruction and care (and fall protection in place), you can traverse your roof with almost no damage to the slates. Using a polyurethane foam pad will help distribute your weight and reduce the chance of breaking slates. If major work or traffic is anticipated, it is easy to remove slates and nail or screw steps to the roof. When finished, simply slide another piece of UnderBlock™ UV & Moisture Barrier over the nail holes as flashing and slide the slates back into place, working your way down the roof.

tranparent
Q: My neighbor recently replaced his roof with a synthetic slate. Some of the slates have curled up and warped. Some are also fading. Does real slate do that?

A:

No. Real, genuine slate weathers gracefully over time. Because each piece will age slightly differently, a genuine slate roof becomes more beautiful over time, adding charm and elegance to any home.

tranparent
Q: How do you cut slate?
A:

The simplest way is with a standard, guillotine-type slate cutter. Some roofing contractors prefer abrasive style-saw blades or wet-saw-type cutters.

tranparent
Q: How do you drill holes in the slate?

A:

TruSlate® Field Slate installs without nails. So, unless you have a unique situation or detail, no nail holes are required. If needed, a standard 3/16” masonry bit on a drill motor works fine.

TruSlate® Trim Slates have pre-drilled holes for easy installation.

tranparent
Q: How are ridges and hips done?
A:

TruSlate® Trim Slate pieces are predrilled and ready to install. The standard piece is 7” wide x 16” long and when installed has a 10” exposure. Traditional saddle-type installation is the most popular, although some customers prefer copper ridge caps, antique Spanish clay tile, or other custom methods.

tranparent
Q: Can I use a ridge vent with your System?
A:

Yes. TruSlate® Ridge Vent was designed specifically for the TruSlate® System.

tranparent
Q: What are the hangers made of? Can you see them?

A:

The hangers are made of spring-hardened, powder-coated stainless steel wire. They are virtually invisible from the ground.

tranparent
Q: What is the availability of your slate?
A:

It depends on the color and quantity you need. Although we strive to maintain an inventory, our stock is constantly changing. When ordering slate, it is best to plan on an 8-week lead time although, in most cases, we’ll have it in stock or already on the way to our warehouses.

tranparent
Q: Will I see gaps when installed?
A:

When installed correctly, you should not see gaps in
between the slate courses or between the slates.

tranparent
Q: Because the slate isn’t overlapped like traditionally installed slate, should I be concerned about leakage?

A:

No, because the UnderBlock™ UV & Moisture Barrier is the
foundation of the TruSlate® Premium Roofing System and is made from a high-density polyethylene (HDPE) providing exceptional
resistance to weathering, freezing, and stress cracking.

tranparent
Q: Are there any weather conditions not conducive for installation?

A:

With a proper instruction and care (and fall protection in place), a TruSlate® Premium Roofing System can be installed even during the harshest weather conditions because installation does not require that you nail the slate. The unique hanger system and UV moisture barrier provide protection for the roof during all types of weather.

tranparent
Q:

Will slate fade or weather?

A:

Slate, like any other natural building product, may fade or weather over time when subjected to constant exposure to UV and the elements. The weathered look of natural slate adds to its old-world charm and is a highly desired design feature. For instance, many architects and property owners select TruSlate® Autumn Dusk for its natural weathering characteristics—which, over time, provide a natural warm blend of greys, greens, tans, and buffs throughout the roof.

tranparent
Q: How do different lighting conditions affect the look of the roof?

A:

Because it is a completely natural material, the appearance of a TruSlate® roof will vary depending on the amount and type of light that reaches the roof. It is not uncommon for the appearance of a TruSlate® slate roof to vary considerably throughout the day as the sun moves across the sky. For example, a Greystone roof can range from light and mirror-like (in bright sunlight) to darker with less contrast (under cloud cover). This variation is part of the charm and natural beauty of a genuine slate roof.

TruSlate Home  •  Learn About TruSlate  •  TruSlate Colors  •  Photo Gallery  •  Compare Options  •  FAQ •  Install Guides & Documents  •  Standards & Code Approvals  •  Warranty Information  • Find a Contractor  •   Visit GAF.com  •  Contact Us