Did you notice that your asphalt shingle roof has a layer of granulated asphalt? Those small bits of asphalt may not seem like much at first glance, but roof replacement experts would tell you that they are actually an important part of a typical asphalt shingle roof. Let’s take a quick look at what these granules are and why they are important.
A Closer Look
Granules in your asphalt shingle are actually small bits of the shingle’s top surface. Originally bonded to the shingle itself, small granules eventually break off, creating the gritty mass typically found on top of a roof. You will notice that newer roofs will have most of the granules still attached to the shingles compared to older ones.
The first main purpose of asphalt shingles is to provide protection against the sun’s ultraviolet (UV) rays and extreme temperature changes. According to roofing contractors, the granules physically block and limit the amount of sunlight (and heat) that can be absorbed by the individual shingles. This helps reduce the chances of the shingles warping or curling, which is often caused by uneven temperature distribution among the top and bottom layer of the shingles.
Without the granules, asphalt shingles would have that plain, flat look. The granules, while still embedded to the shingles, create a distinct texture that enhances the overall look of the roof’s surface. This is also the reason why older shingles with fewer granules tend to look drab and lacking.
A great way to tell the age of the asphalt roofs is to check to see if there are still plenty of asphalt granules left on the surface. If so, then roof repair experts will only have to perform minor repairs. If the granules are mostly gone or, worse, found washed down the gutter channels, it’s a sign that you need to have your shingles replaced ASAP.
Learn more about asphalt roofing from us. Neumann Construction is the leading roofing company in Brainerd, MN. You can call us at (218) 203-0760 or fill out our online form to request a free quote.