Asphalt roof weight
Asphalt shingles are very popular among roofing materials, mainly because they are very cheap and easy to install. You can find two types of asphalt shingles, organic and fiberglass.
Although their name says they are organic, they are not very environmental friendly.
These shingles are reinforced with fiberglass coated with a resin made from formaldehyde. They are fireproof and also they are much lighter than organic shingles. Organic shingles will stand better in powerful winds then fiberglass shingles.