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2. Asphalt shingle - Wikipedia

   en.wikipedia.org/wiki/Asphalt_shingle

   American Society of Civil Engineers ASTM D7158 is the standard most United States residential building codes use as their wind resistance standard for most discontinuous, steep-slope roof coverings (including asphalt shingles) with the following class ratings: Class D – Passed at basic wind speeds up to and including 90 mph (140 km/h); Class ...

3. Enhanced Fujita scale - Wikipedia

   en.wikipedia.org/wiki/Enhanced_Fujita_scale

   The old ratings and new ratings are smoothly connected with a linear formula. The only differences are adjusted wind speeds, measurements of which were not used in previous ratings, and refined damage descriptions; this is to standardize ratings and to make it easier to rate tornadoes which strike few structures.

4. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Rubber shingle, an alternative to asphalt shingle, slate, shake or tile. Made primarily of rubber, often recycled tire-derived rubber. Other typical ingredients include binders, UV (ultraviolet light) inhibitors and color. Warranted and designed to last at least 50 years in most cases. Asbestos shingles. Very long lifespan, fireproof, and low ...

5. 'Uninhabitable for weeks or months': Why Helene's hurricane ...

   www.aol.com/uninhabitable-weeks-months-why-helen...

   Though all hurricanes produce life-threatening winds, hurricanes rated Category 3 and higher are known as major hurricanes. Major hurricanes can cause devastating to catastrophic wind damage and ...

6. Fujita scale - Wikipedia

   en.wikipedia.org/wiki/Fujita_scale

   The expanded and refined damage indicators and degrees of damage standardize what was somewhat ambiguous. It also is thought to provide much better estimates of wind speeds and sets no upper limit on the wind speeds for the highest level, EF5. Environment Canada began using the Enhanced Fujita scale in Canada on April 1, 2013. [22]

7. Saffir–Simpson scale - Wikipedia

   en.wikipedia.org/wiki/Saffir–Simpson_scale

   So an intensity of 115 kn is rated Category 4, but the conversion to miles per hour (132.3 mph) would round down to 130 mph, making it appear to be a Category 3 storm. Likewise, an intensity of 135 kn (~155 mph, and thus Category 4) is 250.02 km/h, which, according to the definition used before the change would be Category 5.