Granule loss occurs when an asphalt shingle roof’s outer layer comes loose and exposes the asphalt layer underneath. It happens to every asphalt shingle roof, but it doesn’t always point to a roofing problem. In today’s post, the sloped and flat roof contractors at Next Level Roofers explain its causes.
What Are Granules For?
First, let’s answer the most obvious question: what are granules for?
Most of today’s asphalt shingles are made of two layers: the backing material, made from either recycled paper pulp (also known as “organic” shingles) or fiberglass and soaked in asphalt, and the outer layer of granules. These granules are made from crushed colored rock, and can be mixed with other materials like similarly-sized copper for protection against algae.
During manufacture, the granules are pressed onto the hot asphalt-soaked backing material, and stays embedded as it cools. Since the process doesn’t require adhesive, it’s normal for asphalt shingles to shed granules even when new. Continued exposure to rain and wind often results in loose granules making their way into the gutters — in fact, this is to be expected within the first year after completing a new construction roof installation project.
Should You Be Worried?
It’s important to note that the initial granule loss should taper after the first year. If the sediment in your gutters around this time is about an inch deep, then yes — you should be worried. Apart from the unsightly look, the dark areas are “bald” spots that indicate the exposed asphalt layer. Since asphalt is more vulnerable to damage caused by exposure to UV radiation, further damage can only be expected if the granule loss is left as it is.
Major granule loss is to be expected in roofs that are beyond their service life: as the backing material ages, it loses its hold on the granules. If the same happens to roofs that are within its expected service life, it can be ascribed to a manufacturing defect or impact damage. In either case, your roofer should be able to offer solutions by way of replacement or repair, depending on the cause.
If your roof is suffering from granule loss, or if you want to learn more about our residential roofing services, give Next Level Roofers a call at (407) 237-7960. You can also fill out our contact form to schedule an appointment. We serve communities in The Villages and Sumter County.
