- Have been around more than a century
- Light weight about 2-3 pounds per square foot
- Good fire resistance – class A rating
- Less expensive in the long rung because material and labor costs are so much less
- Need little or no maintenance
- Installed on 2 inches slopes all the way up to vertical walls.
- Easy to install
- Huge variation of colors
ANATOMY OF A ASPHALT SHINGLES
Constructed in layers, each layer is for particular function – Base, Asphalt Coating, Granular surface layer.
Asphalt shingles we install have base layer – fiberglass felt.
Two kinds of base laywers – Organic Felt vs Inorganic Fiberglass
- Organic felt - Organic shingles
- Use to be made from a combination of cellulose and fiber from cotton and wool rags
- Later was made from cellulose from wood fiber, recycled papers, and cardboard.
- Today organic felt shingles are thicker and heavier than fiberglass shingles
- Inorganic felt - also called Fiberglass shingles
- Easier to install
- High fire resistency
- Better for the enviroment
Production of a roofing shingle
Asphalt, limestone and fiberglass sheets are transported into a shingle factory. The limestone is blanded with the asphalt to create a filled coating. Rolls of fiberglass sheets are connected together to create one continues fiberglass sheet.
The fiberglass mat is impregnated with asphalt and colored granules heated to 400 degrees fahrenheit. The asphalt provides the waterproofing protection. The granules provide UV protection and aesthetics. All the different colors you see on your roof are added during this process.
The last step is cooling process, because the sheets are simply to hot to handle. A sealent is applied for protection from high winds. The sheets are cut into individual shingles, stacked and packed into bundles.