ORGANIC SHINGLES
FIBERGLASS
SHINGLES
Organic-based shingles are the oldest type of asphalt roofing tile. The organic part of asphalt shingles is a cellular fibre substrate, often recycled paper, impregnated with asphalt and compressed under high pressure. More flexible than fibreglass shingles, they are easier to install in cold weather, more tear-resistant and able to hide imperfections on the roof’s deck. Organic shingles are heavier and therefore more resistant to strong winds. And more important in our northern climate, they are better at withstanding changes in temperature.
Currently more popular: asphalt shingles manufactured with a mat composed entirely of glass fibres, referred to as composition shingles. The fibreglass mat is surfaced with an asphalt coating, followed by mineral granules. Laminated or architectural shingles are somewhat thicker due to an extra layer of tabs. Fibreglass shingles are lighter than their organic counterparts, because less asphalt is used during manufacturing, and they are less expensive. They are also more heat-resistant and the “feet”, or notched ends, are less likely to lift, a problem often encountered on older roofs. An underlayment of asphalt-saturated felt should be installed over the roof structure prior to laying fibreglass shingles.
