Are you a homeowner looking to make an informed decision about roofing materials? If so, you have likely heard of asphalt shingles. However, you may not know the different types of shingles available for your home. One option is Class D asphalt shingles. This blog post explains what Class D asphalt shingles are and how wind resistance ratings can affect your choice.
Why are we qualified to discuss the topic?
AIC Roofing & Construction, Inc. earned the Consumer Protection Excellence Award. We have installed more than 100 system roofs with enhanced warranties for our clients. This commitment to consumer protection shows that we install quality roofs and stand behind our work. Only the top 2 percent of roofing contractors qualify as Master Elite Contractors.
What are the different wind resistance levels for asphalt shingles?
Organizations such as the American Society for Testing and Materials (ASTM) and the International Code Council (ICC) set standards to classify asphalt shingles’ wind resistance. Manufacturers often measure wind resistance by the design wind speed the shingles can withstand.
Common classifications under ASTM D7158 testing include:
- Class D (90 mph): Shingles classified as Class D are designed to withstand uplift at wind speeds of up to 90 miles per hour.
- Class G (120 mph): Shingles classified as Class G are designed to withstand uplift at wind speeds of up to 120 miles per hour.
- Class H (150 mph): Shingles classified as Class H are designed to withstand uplift at wind speeds of up to 150 miles per hour.
Common classifications under ASTM D3161 testing include:
- Class D (90 mph): Shingles classified as Class D are designed to withstand wind speeds up to 90 miles per hour.
- Class F (110 mph): Shingles classified as Class G are designed to withstand wind speeds up to 110 miles per hour.
- Class A (60 mph): Shingles classified as Class H are designed to withstand wind speeds up to 60 miles per hour.
It’s important to note that these classifications may vary, and manufacturers often provide specific wind resistance ratings for their products. Additionally, local building codes may specify the minimum wind resistance requirements for roofing materials based on the geographical location and prevalent weather conditions.
Why do wind resistance ratings for asphalt shingles matter?
Wind resistance is a critical factor for asphalt roof shingles because it ensures the durability and longevity of your roof. Here are several reasons why wind resistance matters for asphalt shingles:
Protection Against Wind Uplift: High winds during storms or hurricanes create strong uplift forces on the roof. Wind-resistant shingles withstand these forces and remain securely attached, preventing damage or leaks.
Prevention of Wind-Driven Rain Intrusion: Wind-driven rain often occurs during storms with strong winds. Wind-resistant shingles prevent water from entering, protecting the roof structure and interior from water damage.
Longevity of the Roof System: Shingles that resist wind damage stay in place longer. This improves roof stability and reduces the need for repairs or replacement from wind-related issues.
Compliance with Building Codes: Many codes specify minimum wind resistance for roofing materials based on location and typical wind conditions. Using properly rated shingles ensures code compliance and strengthens the building’s safety and resilience.
Insurance Considerations: Insurance companies often consider roofing wind resistance when calculating coverage and premiums. Using wind-resistant shingles can lower insurance costs and provide better protection against wind damage.
Enhanced Structural Integrity: Wind-resistant shingles support overall roof structure. Preventing shingle loss or damage helps maintain the effectiveness of the entire roofing system.
When selecting asphalt shingles, consider the wind resistance rating based on climate and local building codes. Choosing shingles with the right rating ensures your roof can handle high winds and harsh weather.
Are Class D shingles rated for fire?
No, the classification for fire resistance in roofing materials does not include a Class D designation. The classifications are Class A, Class B, and Class C. Class A offers the highest fire resistance.
Standards and classifications can vary. Different regions or manufacturers might use slightly different systems. To get accurate information about a shingle’s fire resistance, consult the manufacturer’s product documentation or contact them directly. Check local building codes, as they may require specific fire resistance levels for roofing materials in your area.
Always follow local regulations and recommendations to ensure the roofing materials meet safety standards for your location.
Which GAF shingles are class d?
GAF shingles surpass the Class D designation and are rated for Class F & H.
In closing
Whether you’re looking for a high-quality roof installation, repair, or new gutters and siding, AIC is here to help. We believe in and practice the best customer service possible, including showing up on time, following through on what we say we’ll do, and treating people with common decency and respect.
Our in-home consultations are free, informative, and low-pressure. Please get in touch with us by texting, calling, or filling out our contact form.
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