Up on the roof, it can be more than 20° hotter than it is at ground level. Your roofing system needs to deal with this day in and day out. Plus, it can be damaged when temperatures change too fast.
With this in mind, it’s crucial to keep an eye on your roof during the summer months.
Let’s review the biggest ways heat can hurt your roof:
1. Shingle Decay
Color bleaching is one of the most obvious early signs of shingle decay. Over time, heated shingles become brittle and more prone to damage from other sources.
Solar damage to shingles is accelerated by problems with attic ventilation. This causes hot, moist air to create a “pressure cooker” effect that bakes shingles from below.
When both these issues are observed at once, shingles are much more likely to develop other forms of damage, especially cracking, which makes them more vulnerable to leaks.
2. Granule Loss
Granule loss doesn’t happen as a direct result of sun exposure, but it’s closely related. Reflective granules are what give average roofing shingles their ability to divert some solar heat.
Early on in a roofing system’s life, visible granule loss is nothing to worry about. This will taper off to an acceptable level within a year or so and should no longer be noticeable.
Later on, though, granule loss signals a concern. Granules can be swept off during heavy rain. If you’re losing too many, you may find them clogging your gutters.
A shingle that becomes exposed without enough granule coverage will warp more quickly in the sun. This usually leads to roof repair sooner or later.
Warping or curling is what you get when the edges of a roofing shingle bend upward. This leaves exposed regions between shingles that are prone to moisture intrusion.
Sometimes, warped shingles can be softened and then secured back in place with roofing cement or roofing nails. Most of the time, however, a warped shingle should be replaced.
Like warping, cracking can be the result of rapid fluctuations in temperature. This happens when an unusually hot day is followed by a cool evening. All but very superficial cracks compromise the shingle’s ability to repel water. Residential roof repair is a must.
Cracking can also be caused by walking or distributing weight improperly on the roof. It’s easy to accidentally break several shingles at once this way, especially on a hot day. That’s one reason we recommend homeowners never climb up on the roof.
At Plair Homes, our expert team helps your roof beat the heat. We’re Jacksonville’s leading name in family-owned roof repair. Because we live and work here, we understand roofing for Florida homes showing signs of heat damage. Contact us today.