Comparing GAF Timberline® UHDZ™ vs. HDZ® Shingles

Each year, hurricanes cause billions of dollars in losses for homeowners across the country. In an effort to combat this, the roofing industry has made advances to help reduce the impact caused by storm damage, including specially designed shingles that can handle heavy impacts and high winds.If you live in a hurricane-prone area, here's what you need to know about hurricane shingles designed to handle the high wind speeds and debris impacts that can come with major hurricanes.Understanding Impact-Resistant ShinglesHurricane Shingles, (or impact-resistant shingles) are built to withstand both impacts and high wind speeds. They're robust, often created from a unique combination of styrene-butadiene-styrene (SBS) and asphalt, providing more strength than non-reinforced asphalt shingles.In hurricane-prone areas, sharp winds can easily blow debris and other large objects—like tree branches—onto a roof. Shingles that pass the UL 2218 Class 4 impact-resistant test are most effective at limiting impact damage. These shingles are tested by dropping a 2-inch steel ball from 20 feet above. The steel ball impacts various target locations of the shingles on the test deck. The test includes two impacts per target location. The shingles must handle the impact while showing no evidence of ruptures or cracks through the shingle.These shingles should also be able to withstand Category 3 hurricane wind speeds, ranging from 111 to 129 mph.Choosing the Right Shingles for Your RoofWhen deciding between hurricane shingles, consider their wind classification, impact resistance, and warranties.Wind ClassificationQuality, UL 2218 Class 4 impact-resistant shingles should be able to handle at least 110 mph wind speeds. These shingles tend to be made of either metal or asphalt mixed with SBS. For example, the GAF TimberSteel™ Premium Metal Roofing System is effective against high wind speeds due to layers of protection, innovatively designed to help protect your home against the elements.Impact ResistanceQuality hurricane roofing materials, including impact-resistant shingles come with enhanced protection against impacts from objects, especially hail. While these shingles may be more expensive than non-reinforced asphalt shingles, they tend to require less maintenance. And since these shingles can withstand certain kinds of impacts that often happen during a hurricane, it may not need as many repairs.WarrantiesConsider the shingles' warranties and what you're protected against. A wind warranty can guarantee roof repair and replacement for specific wind speeds as long as you meet all the warranty's requirements.GAF Hurricane Roofing InnovationsCertain GAF shingles like Timberline® AS II have the best possible wind and impact resistance ratings. They meet the highest rating, Class F, for the Standard Test Method for Wind Resistance of Steep Slope Roofing Products (ASTM D3161). This means they can withstand wind speeds up to 110 mph.Timberline® AS II shingles also have the highest rating, Class H, for the Classification for the Standard Test Method for Wind Resistance of Asphalt Shingles (ASTM D7158). This means the shingles can resist uplift from up to 150 mph wind speeds. If that wasn't enough, these shingles' Class 4 classification for the UL 2218 test means they can handle a 2-inch steel ball drop test from 20 feet above.With the highest possible ratings for all these tests, the Timberline® AS II shingles are proven and tested against the closest possible hurricane-like conditions (testing performed under controlled laboratory conditions). The robust SBS-modified asphalt material and LayerLock® technology help fortify your roof against wind, rain, and hail. These GAF shingles are also eligible for the WindProven™ Limited Wind Warranty**, which provides infinite wind speed protection when installed with the required combination of four qualifying GAF accessories.Shingle Installation and Roof Maintenance TipsProperly installing impact-resistant shingles is essential for them to perform their best, so choose an experienced roofer. They'll know how to nail the shingles correctly and make sure they're firmly attached to each other and the roof to prevent any openings for leaks or weaknesses. Also, ask your roofer if they know how to install hurricane clips to help prevent your roof from flying off during a storm.Once your roof is installed, perform regular maintenance every year before and after hurricane season. Replace any missing or broken shingles, and secure any loose shingles. Also, replace any rusted nails or flashing. As part of roof maintenance, confirm your gutters are working properly and clean out any leaves, allowing water to flow away from your home.A weak point on a roof can degrade even further in harsh hurricane weather, and ensuring your roof is in stable condition can help keep you and your home safe.FAQsWhat are the best shingles for high wind?The best shingles for high winds are classified as Class F for the ASTM D3161 and Class H for the ASTM D7158 test. These two classifications mean the shingles have the best ratings for handling hurricane winds.Do impact-resistant shingles last longer?Due to their durable construction, made with SBS-modified asphalt, which makes shingles more flexible and better able to withstand impact stress than standard architectural shingles, GAF impact-resistant shingles are built to last many years.Preparing for the Next StormAfter the hurricane season, check your roof for damage. View this GAF guide on roof storm damage to learn what to look for and what to expect for possible repairs. If your roof needs work before or after a storm, reach out to a certified contractor* in your local area for guidance and support.*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the GAF Contractor Terms of Use.**15-year WindProven™ limited wind warranty covers GAF Shingles with LayerLock® Technology only and requires the use of GAF Starter Strips, Roof Deck Protection, Ridge Cap Shingles, and Leak Barrier or Attic Ventilation. See GAF Roofing System Limited Warranty for complete coverage and restrictions. Visit gaf.com/LRS for qualifying GAF products. For installations not eligible for the WindProven limited wind warranty, see GAF Shingle & Accessory Limited Warranty for complete coverage and restrictions.

When helping customers identify the roofing materials they want installed on their properties, the functional and aesthetic qualities are both top considerations. While you're aiming to provide adequate protection from the elements and ensure energy efficiency, homeowners are also interested in how it will all look.Premium shingles can satisfy both priorities, effectively protecting the home (and its inhabitants) while providing an eye-catching appearance and boosting curb appeal.If a customer invests in premium shingles, you'll want to use equally high-quality ridge caps to finish the roof. Premium ridge cap shingles, such as GAF TimberTex® and GAF TimberCrest®, offer a strong protective layer and provide the same luxe look as GAF premium shingles.Here are the key details to know about these ridge cap shingles as well as insights and talking points you can share with customers.What Is GAF TimberTex®?GAF TimberTex® Premium Ridge Cap Shingles measure 12 inches (305 millimeters) wide, with extra-large 8" (203 mm) exposure, which is larger than traditional ridge cap shingles. The large exposure results in less pieces to install and creates a dimensional, luxurious look. These ridge cap shingles were designed to complement the color of GAF shingles, avoiding matching issues and providing the perfect finishing touch.The TimberTex® double-layer design creates added protection on the hips and ridges and delivers an elevated, dimensional appearance. The ridge caps also use Dura Grip™ Self-Seal Adhesive to ensure they stay attached to the roof during sharp winds. They're available in various states across the United States.Shingle Pairing OptionsIf customers invest in Timberline UHDZ(R), Timberline HDZ(R) or Designer Lifetime Shingles, you'll want to use ridge caps that provide the same rich look. GAF Timberline UHDZ® shingles can be combined with TimberTex® ridge caps to give a roof a dramatic, dimensional look. The ridge caps aesthetically complement Timberline UHDZ® shingles on the hips and ridges.What Is GAF TimberCrest®?GAF TimberCrest® Premium SBS‑Modified Ridge Cap Shingles measure 10 inches (254 millimeters) and allow it to meet UL 2218 Class 4 impact resistance, and feature a bullnose rounded edge. They're built with an SBS polymer-modified asphalt that increases its flexibility. These ridge cap singles are ready to install out of the box, helping make quick work for your projects.To make your job easier, GAF TimberCrest® cap shingles also come with an alignment guide in the headlap to ensure proper centering on the hip and ridge. It's specifically constructed to enhance the architectural aesthetics of houses in the West, Southwest, and BC Canada.Shingle Pairing OptionsIn addition to Timberline HDZ(R) and Timberline HDZ(R) RS, TimberCrest(R) Ridge Cap shingles pair well with GAF Timberline® AS II shingles with a high-profile UL 2218 Class 4 impact resistance. These enhanced profile ridge caps also have Class 4 impact resistance and give Timberline® AS II shingles a more dramatic appearance than traditional ridge caps like the GAF Seal-A-Ridge® AS. Customers get the best of both worlds in their roofing system with effectiveness and aesthetic appearance.TimberCrest® ridge caps also complement GAF Grand Sequoia® AS shingles, which have a wooden shakes-like appearance and Class 4 impact resistance. Both are built using SBS-modified material, which gives the shingles and ridge caps enhanced flexibility as the roof expands and contracts in different weather conditions.Warranty Protection Offered for Both Ridge Cap OptionsStainGuard Plus™ Algae Protection Limited Warranty* protection is included with TimberTex® and TimberCrest®, both of which tie into the GAF Lifetime Roofing System**. This is just one of the many benefits of choosing the GAF ecosystem of products for your roofing projects.Apart from the premium and durable products GAF offers, a strong warranty that can back up your jobs ensures happy customers, a good reputation, and continuous work for your company. When you install premium GAF shingles with three qualifying GAF accessories for your customers, they automatically get a GAF Lifetime Warranty. When installed with four qualifying GAF accessories, they become eligible for the WindProven™ Limited Wind Warranty***.Choosing the Right Roofing Products for Your Next JobGAF TimberTex® and TimberCrest® premium ridge cap shingles, which function best when combined with GAF shingles, can effectively protect a roof while maintaining its aesthetic appeal. To see all the options available to your customers, explore GAF ridge cap shingle products.Ready to move forward with one of the premium ridge cap shingle options? Reach out to your area's GAF Territory Manager for availability and more information.*25-year StainGuard Plus™ Algae Protection Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus™ logo. See GAF Shingle & Accessory Limited Warranty for complete coverage and restrictions.**See GAF Shingle & Accessory Ltd. Warranty for complete coverage and restrictions. The word "Lifetime" refers to the length of coverage provided by the GAF Shingle & Accessory Ltd. Warranty, and means as long as the original individual owner(s) of a single-family detached residence [or the second owner(s) in certain circumstances] owns the property where the shingles and accessories are installed. For owners/structures not meeting the above criteria, Lifetime coverage is not applicable. Lifetime ltd. Warranty on accessories requires the use of at least three qualifying GAF accessories and the use of Lifetime Shingles.***15-year WindProven™ limited wind warranty covers GAF Shingles with LayerLock® Technology only and requires the use of GAF Starter Strips, Roof Deck Protection, Ridge Cap Shingles, and Leak Barrier or Attic Ventilation. See GAF Roofing System Limited Warranty for complete coverage and restrictions. Visit gaf.com/LRS for qualifying GAF products. For installations not eligible for the WindProven limited wind warranty, see GAF Shingle & Accessory Limited Warranty for complete coverage and restrictions.

When developing a new roofing product, it's important to ensure it meets the local roofing codes and requirements in multiple jurisdictions. These standards are often regionally similar, but some may require additional testing or the use of certain raw materials. The product development team at GAF works hard to ensure products meet some of the strictest codes, so they can provide years of protection no matter where they're installed.Jeremiah Hershberger, GAF product manager of residential accessories, recently discussed the role codes and standards play in residential roofing product development, specifically concerning roof vent code requirements.Why Are Product Codes and Standards Important?The main purpose of building codes and standards is to maintain public health, safety, and welfare in all structures. They do this by ensuring that buildings are constructed in such a way as to minimize potential hazards, like fire, structural failure, or storm damage.Building codes exist to improve the safety and livability of buildings. They set minimum requirements for the materials and systems installed, as well as their installation methods. In the US, building codes are upheld and enforced by state, county, and city governments through the permitting and inspection processes.Standards also provide minimum design and performance metrics for products and systems. However, unlike local building codes, they are often universally upheld (nationally or worldwide). Organizations like ASTM International and the National Fire Protection Association are responsible for creating, updating, and communicating these standards. Local building codes often use these standards to set minimums for product and installation quality.How Do Roofing Codes and Standards Affect Product Development?"The goal of product development at GAF is to provide enhanced value for our customers and contractors," Hershberger explains. Ultimately, customers need to be confident in the performance of GAF products and building codes and standards provide a minimum threshold for product performance. Accordingly, they must be taken into consideration when designing products.Codes are prescriptive performance requirements for buildings. They include both the materials used to construct the building and how they're installed. All products used in a particular building must meet the local code requirements for that county or city.Standards are used as bases of comparison. Types of standards include:Testing standards that define methods and minimum acceptable resultsRating standards that provide a way to fairly compare productsDesign standards that set the criteria for specific roof system designsWhen products are developed for use in many geographic areas, they must meet several locations' requirements. For instance, when developing a new off-ridge ventilation product, GAF considers not only how much net free area (NFA) the unit will have, but also the performance characteristics required to meet Florida Building Code, Texas Department of Insurance (TDI), and Miami-Dade standards so the product can be used in areas that adhere to those codes.Why Does GAF Pay Attention to Codes and Requirements?"We want our customers to be confident in the performance of our products not based solely on our word but also on the basis of third-party standards that level set the industry," notes Hershberger. "Codes and testing requirements provide customers with that outside assurance that our products will hold up to the environmental rigors of a specific region or location."For example, TAS-100(A) tests a product's performance in wind-driven rain. The test provides information on how well a ventilation product will perform in such an environment and helps the product development team learn how likely it is that a ventilation product might leak, so we can then mitigate that risk.How Do Codes Affect Product Quality?Codes may specify what raw materials can be used to make a product or how it will perform in certain standardized tests. For instance, ASTM E108 or ANSI/UL790 Class A roofing fire ratings require a high degree of fire protection to the roof deck, which directly affect the materials used to produce these products. Similarly, the UL 2218 Class 4 impact test or the ASTM E330 Uplift Pressure Test show how a product performs under naturally occurring forces (e.g., hail or wind)"GAF strives to find the balance between performance, strength, and ease of installation (or handleability)," Hershberger says. "This often leads us to develop products that use higher grade materials (better performance over time), are simpler to manufacture with fewer points of potential failure, and are easier to install correctly (ensuring repeatability)."How Codes Affect the Development of High-Quality Roof VentsCreating high-quality roof vents and rooftop accessories didn't occur by accident. The GAF development team focuses on roofing codes and requirements through an intentional design process to drive innovation. From product ideation to design, development, and launch, the team ensures products meet or exceed several codes and standards, including:Florida Building CodeSets minimum performance standards for roof construction, such as wind resistance, fire performance, and roof ventilation requirements. Products must be approved by the state before being installed.Miami-Dade CountyThis county in Florida has some of the strictest building codes in the country due to its classification as a High-Velocity Hurricane Zone. Products used there must also be approved by the county as meeting not only Florida Building Code, but the stricter county requirements.Texas Department of Insurance (TDI)Regulates insurance companies and the insurance/claims process in the state of Texas. Roofing products are evaluated based on TDI-adopted building specifications regarding products used and installation methods.Other tests performed to ensure product performance include:TAS-100(A). Determines the water infiltration resistance of a ridge area ventilation system (ridge vents, static vents, turbines, or powered vents).Simulated snow/ice dam. Ice dams can form when a roof is not properly ventilated, leading to snow melting and refreezing along the lower edge of the roof.UL2218 Class 4 impact test. The UL2218 test is a steel ball drop test that evaluates the impact resistance of roof coverings. Class 4 products are shown to withstand the 20-ft drop of a 2-inch diameter steel ball without cracking through significant damage.Ensuring Roofing Products Are Up to the TaskThe product team at GAF routinely performs these tests to ensure roofing materials meet local roofing code requirements. The company then makes the results publicly available, helping customers nationwide rest assured that they can rely on GAF roofing products to perform as expected.For more information on the GAF ventilation products that meet or exceed code requirements, explore the ridge and off-ridge ventilation offerings.