Different types of roofing materials
Today,
advanced roofing materials provide an unprecedented range of alternatives, as
well as new looks for existing materials.
1. Solar tiles
Advanced solar collectors integrate seamlessly
into existing shingles, generating up to 1 kilowatt of energy per 100 square feet. They’re particularly good for sunny roofs in homeowners’
associations that forbid typical solar panels.
2. Asphalt shingles
Asphalt shingles are the most common roofing
materials in America because they’re effective in all environmental conditions.
Quality varies widely, so ask whether they pass the ASTM D3161, Class F (110
mph) or ASTM D7158, Class H (150 mph) wind tests and the AC438 durability test.
Upfront costs are low, but you should expect to replace the shingles after
about 20 years.
3. Metal roofing
Metal roofing comes in vertical panels or shingles resembling slate, tile and
shake – and lasts about 60 years. Metal excels at sloughing off heavy snow and
rain, won’t burn and resists high winds. It is lightweight and can be installed
over existing roofs.
4. Stone-coated steel
Interlocking panels mimic slate, clay or
shingles and resist damage caused by heavy rains (up to 8.8 inches per hour), winds of 120
miles per hour, uplifting, hail and freeze-thaw cycles.
5. Slate
Slate roofing lasts more than 100 years. It
won’t burn, is waterproof and resists mold and fungus. Slate is effective in
wet climates
but is expensive, heavy and may be easily broken when stepped on. Keep this in
mind if you live in an area that experiences hail.
6. Rubber slate
Rubber slate looks natural and can be cut with
a knife to fit intricate roofs like those found on Victorian homes. Rubber
slate roofs can last 100 years but can be damaged by satellite dishes and
walking – so may also be susceptible to damage by hail, similar to slate.
7. Green roofs
Green roofs are covered with plants and can improve air quality, reduce
water runoff and insulate homes to reduce urban heat islands. Their estimated
lifespan is 40 years.
8. Built-up roofing
This heavy roofing consists of layers of
asphalt, tar or adhesive topped with an aggregate and is only for flat roofs.
Tar and gravel roofs, also for flat roofs, are best for roof-top decks with heavy
foot traffic.
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