How Heat Can Damage Your Roof, And How To Limit The Damage
Your roof protects your house from weather-related damage, but the roof itself is not immune to the effects of weather. For example, extremely high temperatures can damage the roof and shorten its lifetime.
How Heat Can Damage the Roof
Damage to Decking
The roof deck is a roofing material that sits between the structural components (the support structures) and the weatherproofing and insulation layers. The deck is the material on which the actual roofing material is installed. The deck can be made of different materials, including wood, steel, and concrete. Too much heat can damage the deck, with the damage coming in different layers depending on the material; for example, concrete can crack and wood can warp.
Asphalt Shingle Cracking
Asphalt shingles have protective granules and asphalt material that limits heat damage. However, too much heat can still damage the shingles, especially if after they have aged and lost some of their elasticity. For example, extreme heat can cause the asphalt shingles to crack.
Caulk is used in different parts of the roof; for example, it is used to seal the boundaries between the roof flashing and the shingles. This is necessary to prevent water from getting under the flashing and damaging the roof. Unfortunately, too much heat can deteriorate the caulk and cause it to fail prematurely, allowing water to get under the flashing.
A major way in which heat causes damage roofs is by causing the expansion of different materials. Expansion-related damages can occur in different ways; for example, it can create gaps between roof joints because different materials have different expansion rates. It can also cause nails to loosen and pop off the roof when the nails' holes expand.
As you can see, extreme heat can cause various damages to the roof, but it doesn't have to be that way. Here are some of the measures to prevent heat-related damage on the roof:
- Paint the roof white – This works because white color reflects most of the heat that falls on it
- Ensure proper roof ventilation – This prevents heat originating within the house from escaping out of the attic and damaging the roof
- Install a reflective coating or seal to minimize the heat damage
- Inspect the roof regularly for damages and fix them before they get too serious
A properly maintained roof won't suffer as much heat damage as a poorly maintained roof. Your roof isn't doomed, though, if it has already sustained heat-related damage; a roofing contractor can help you fix it and prevent further damage.