Impact-resistant roof materials
Potential benefits of roofs with strong impact resistance
As North America's largest roofing manufacturer, GAF offers a variety of products that may help protect your roof against hail, including shingles and roofing materials that pass Ul 2218 Class 3 and Class 4 impact tests.1 Products that are UL2218 Class 3 and 4 rated may even qualify for insurance discounts.2
1 Only products sold in packages bearing the UL 2218 Class 3 or Class 4 Classification statement are rated for Class 3 or Class 4 impact resistance. Testing performed under controlled laboratory conditions. GAF makes no express or implied warranty about the impact performance of these products against hail. Except as otherwise provided in the Timbersteel™ ArmorPledge™ Limited Warranty, hail damage is not covered under GAF limited warranties. See applicable warranties available at gaf.com for complete coverage and restrictions.
2 Insurance discounts are not guaranteed. If available, discounts vary by state and insurance company. Contact your insurance agent for information before installing a new roof.
2 Insurance discounts are not guaranteed. If available, discounts vary by state and insurance company. Contact your insurance agent for information before installing a new roof.
Impact-resistance testing
UL 2218 impact testing involves dropping various sized steel balls onto tested materials from different heights and evaluating whether there are any cracks, tears, or fractures on the back surface of the product.
Products that withstand the impact of a 1.75-inch steel ball dropped from 17 feet receive a UL 2218 Class 3 rating while products that withstand the impact of a 2-inch steel ball dropped from 20 feet receive the highest rating, UL 2218 Class 4.
Products that withstand the impact of a 1.75-inch steel ball dropped from 17 feet receive a UL 2218 Class 3 rating while products that withstand the impact of a 2-inch steel ball dropped from 20 feet receive the highest rating, UL 2218 Class 4.
Two GAF technologies help select products achieve a Class 4 impact resistance rating¹
SBS-modified asphalt technology
Our proprietary SBS-modified asphalt technology provides excellent flexibility, which helps reduce impact stress. This technology also enhances resistance to cracking and allows shingles to lay flatter in colder temperatures3 when compared to our standard asphalt shingle, making these SBS-modified shingles an easy-to-handle and dependable option for use in varying climates.
This SBS-modified asphalt technology is featured in Timberline® AS II and Grand Sequoia® AS shingles as well as TimberCrest® and Seal-A-Ridge® AS ridge cap shingles.
This SBS-modified asphalt technology is featured in Timberline® AS II and Grand Sequoia® AS shingles as well as TimberCrest® and Seal-A-Ridge® AS ridge cap shingles.
Ultramat™ high-performance mat technology
UltraMat™ technology enhances the shingle at its core to strengthen the shingle’s support layers to help achieve a UL 2218 Class 4 impact-resistance rating.
This technology is featured in GAF products like Timberline UHDZ® shingles.
This technology is featured in GAF products like Timberline UHDZ® shingles.
1 Only products sold in packages bearing the UL 2218 Class 3 or Class 4 Classification statement are rated for Class 3 or Class 4 impact resistance. Testing performed under controlled laboratory conditions. GAF makes no express or implied warranty about the impact performance of these products against hail. Except as otherwise provided in the Timbersteel™ ArmorPledge™ Limited Warranty, hail damage is not covered under GAF limited warranties. See applicable warranties available at gaf.com for complete coverage and restrictions.
3 In temperatures of 40℉ or higher.
3 In temperatures of 40℉ or higher.
Choosing roofing solutions from GAF with enhanced impact resistance
Class 4 products have the highest rating based on UL 2218 impact testing and may help protect your roof against hail.1
Asphalt shingles
Timberline® AS II
A shingle that can really take a punch, made with proprietary SBS-modified asphalt.
View Timberline® AS II
Timberline UHDZ® with UltraMat™
Go beyond beauty and beyond expectations with high-performance fiberglass mat technology.
View Timberline UHDZ®
Grand Sequoia® AS
A sophisticated designer shingle that’s as strong as it is beautiful thanks to SBS-modified asphalt.
View Grand Sequoia® AS
Hip and ridge cap shingles
Seal-A-Ridge® AS
SBS-modified ridge cap shingles made with SBS-modified technology.
View Seal-A-Ridge® AS
TimberCrest®
Ridge cap shingles with bullnose rounded edge. Made with SBS-modified technology. Available in the Southwest & West.4
View TimberCrest®
TimberTex® with Ultramat™
Ridge cap shingles with large exposure help add depth and dimension. Made with Ultramat™ technology. Available outside of the West.4
View TimberTex®
Metal roofing
TimberSteel™ system*
The next-generation of metal roofing is optimized to provide the durability you expect from a metal roof. Available in select states.
View TimberSteel™ system
Roll roofing
LIBERTY™ Roll Roofing System**
The LIBERTY™ SBS Self-Adhering Roofing System protects low-slope residential roof areas such as porches, garages, carports, and sheds.
View the system
*UL 2218, Class 4 rating applies to TimberSteel™ Field Shingles and TimberSteel™ Hip & Ridge Cap Shingles only.
**UL2218 Class 4 impact resistance rating refers to complete 2-ply LIBERTY™ SBS Self-Adhering Roofing
1 Only products sold in packages bearing the UL 2218 Class 3 or Class 4 Classification statement are rated for Class 3 or Class 4 impact resistance. Testing performed under controlled laboratory conditions. GAF makes no express or implied warranty about the impact performance of these products against hail. Except as otherwise provided in the Timbersteel™ ArmorPledge™ Limited Warranty, hail damage is not covered under GAF limited warranties. See applicable warranties available at gaf.com for complete coverage and restrictions.
4 Product availability may vary by area. Please see gaf.com/RidgeCapAvailability for more information.
**UL2218 Class 4 impact resistance rating refers to complete 2-ply LIBERTY™ SBS Self-Adhering Roofing
1 Only products sold in packages bearing the UL 2218 Class 3 or Class 4 Classification statement are rated for Class 3 or Class 4 impact resistance. Testing performed under controlled laboratory conditions. GAF makes no express or implied warranty about the impact performance of these products against hail. Except as otherwise provided in the Timbersteel™ ArmorPledge™ Limited Warranty, hail damage is not covered under GAF limited warranties. See applicable warranties available at gaf.com for complete coverage and restrictions.
4 Product availability may vary by area. Please see gaf.com/RidgeCapAvailability for more information.
Products with a UL 2218 Class 3 rating may help protect your roof against hail.1
Asphalt shingles
Timberline HDZ®
Engineered to be first and built to last, a Timberline HDZ® roof creates exceptional depth and dimension.
View Timberline HDZ®
Timberline HDZ® RS
The ultimate choice for reflective shingles, formulated with EcoDark® granules.
View Timberline HDZ® RS
Camelot® II
A designer shingle with sophisticated shapes combined with oversized tabs, inspired by the romance of European architecture.
View Camelot® II
Woodland®
A designer shingle offering a hand-cut look with 21st-century style and artisan-crafted shapes.
View Woodland®
Slateline®
This designer shingle features bold shadow lines and tapered cut-outs to create the appearance of slate. Available regionally.
View Slateline®
Grand Sequoia®
A designer shingle able to make a dramatic, sophisticated statement on a wide range of home styles. Available regionally.
View Grand Sequoia®
Grand Sequoia® RS
A reflective, designer shingle offering the cool roof you need with the distinctive style you crave. Available regionally.
View Grand Sequoia® RS
Hip and ridge cap shingles
Z®Ridge
Ridge cap shingles with unique Z-fold design offering the look of thick wood shakes. Available in Southwest & West.4
View Z®Ridge
Seal-A-Ridge®
Machine cut design provides a much cleaner finished look than hand-cut 3-tab strip shingles.
View Seal-A-Ridge®
1 Only products sold in packages bearing the UL 2218 Class 3 or Class 4 Classification statement are rated for Class 3 or Class 4 impact resistance. Testing performed under controlled laboratory conditions. GAF makes no express or implied warranty about the impact performance of these products against hail. Except as otherwise provided in the Timbersteel™ ArmorPledge™ Limited Warranty, hail damage is not covered under GAF limited warranties. See applicable warranties available at gaf.com for complete coverage and restrictions.
4 Product availability may vary by area. Please see gaf.com/RidgeCapAvailability for more information.
4 Product availability may vary by area. Please see gaf.com/RidgeCapAvailability for more information.
Complete your roofing system with GAF accessories that may help protect against impact. These accessories resisted cracking/fracturing from the impact of a two inch steel ball dropped from 20 feet in GAF testing.5
Off-ridge vents and rooftop accessories
Master Flow™ Pivot™ Pipe Boot Flashing
Tough protection at a notorious source for leaks, plumbing pipe penetrations.
View Pipe Boot
Master Flow™ EZ Cool™ Plug‑in Power Attic Vent – Roof Mount
Roof mount power attic vent that plugs into a 110v electrical outlet in the attic.
View EZ Cool™
Master Flow™ Wi‑Fi Attic Vent – Roof Mount
Control your power attic vent from virtually anywhere with an internet connection via smartphone or tablet.
View Wi-Fi Attic Vent
Master Flow™ High‑Capacity Dome Vent
A great solution for attics requiring large quantities of static exhaust ventilation.
View High-Capacity Vent
Master Flow™ Power Attic Vents – Roof Mount with Thermostat
Serious off-ridge ventilation power with advanced technology.
View Power Attic Vent
Master Flow™ Bath & Dryer Rooftop Vent
Designed to help vent heat and moisture from bathroom exhaust fans, clothes dryers, and other household appliances through the roof.
View Bath & Dryer Vent
5 Based on GAF commissioned testing performed under controlled laboratory conditions by a third party lab using GAF test method. GAF makes no express or implied warranty about the impact performance of these products against hail. Except as otherwise provided in the TimberSteel™ ArmorPledge™ Limited Warranty, hail damage is not covered under GAF Limited Warranties. See applicable warranties available at gaf.com for complete coverage and restrictions.
More ways to help protect a roof
Through its alliance with IBHS and many educational resources, GAF is committed to helping protect homes.
A FORTIFIED Roof™ and select GAF Products — the perfect combination
GAF established a one-of-a-kind alliance with the Insurance Institute for Business & Home Safety (IBHS) FORTIFIED™ program6—a voluntary construction and re-roofing standard designed to help protect homes against severe weather. A FORTIFIED Roof may also qualify homeowners for financial incentives or insurance premium discounts.7
6 Eligibility criteria, terms, and restrictions apply. See current FORTIFIED Home™ Standard available at fortifiedhome.org for details. U.S. only.
7 Insurance discounts, grants, and other incentives are not guaranteed and may vary if available. For more information visit fortifiedhome.org/incentives.
7 Insurance discounts, grants, and other incentives are not guaranteed and may vary if available. For more information visit fortifiedhome.org/incentives.
Innovating the future of storm restoration
GAF is powering success for homeowners, contractors, and insurance carriers before, during, and after impact. At every stage of the process, GAF provides resources to help rebuild more resilient communities.
Frequently asked questions
Some insurance carriers may offer discounts on homeowner's insurance premiums if you install qualifying UL 2218 Class 3 or Class 4 rated roofing products. Insurance discounts are not guaranteed. If available, discounts vary by state and insurance company. Contact your insurance agent for information before installing a new roof.
While some homeowners insurance carriers offer a discount for UL 2218 Class 3 and Class 4 rated roofs, they may require that you add a cosmetic waiver endorsement to your policy to receive the discount. These waivers can limit the coverage for hail in the future, including the exclusion of hail damage that does not cause the roof to leak as a result of the hail damage. Contact your insurance carrier to find out what discounts you may qualify for with an impact-resistant roof and how it may impact your coverage as a result.
Asphalt shingles that are rated Good or Excellent on the IBHS Hail Impact Ratings, such as GAF Timberline® ASII shingles can be used to comply with the shingle impact resistance requirement of the FORTIFIED Home™ Hail Supplement. Visit gaf.com/fortified and current FORTIFIED Home™ Standard available at fortifiedhome.org for details. U.S. only. For the most current IBHS ratings, visit here.
Timberline HDZ is a UL 2218 Class 3 rated shingle.
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