The original Canadian roof system, asphalt shingles have stood the test of time and have evolved about as much as the automobile has!
Once upon a time, asphalt shingles were made with layers of wood, asphalt, and granule and lasted between 5-8 years after having been installed. Although the fabrication process is still fundamentally similar, modern asphalt shingles are made with a fiberglass base, layers of specially formulated asphalt, and specifically cut and shaped granules, allowing the typical shingle to last, realistically, for roughly 25 years in a properly ventilated roof system. Some asphalt shingles can even last up to 40 years.
Now let’s talk about warranties, and how long a well installed Calgary asphalt roof system should last. Shingles have a manufacturers’ rating that differs a fair bit from their realistic life span. Let us differentiate here between manufacturer’s defect warranty and realistic life span.
A manufacturer’s defect warranty means exactly what it is called. It is a warranty against defective products. If an asphalt shingle in Calgary wears down from age, wind, snow, ice and sun exposure, it did so naturally, this is not classified as a manufacturers warranty. A manufacturer’s warranty covers a product that wears down, falls apart, changes color or deteriorates abnormally quickly. Therefore, if a shingle is called a “30 year shingle by manufacturers warranty”, this means the manufacturer will cover any defects, often pro-rated, for that 30 year period. If your shingles deteriorate naturally before that 30 year warranty is over, this does not qualify as a warranty claim as no defect has presented itself.
The realistic life span for Calgary asphalt shingles is roughly 20% less than their manufacturers’ warranty coverage period. This is mostly due to a combination of our dry climate, Chinook winds, rapidly changing temperatures, and the infamous Canadian winters. Therefore, a 30-year shingle will typically last roughly 24 years, a 40 year shingle will typically last roughly 32 years and a 50 year asphalt shingle in Calgary will last roughly 40 years.
Contact one of our roof system design specialists today to discuss what product is right for you.