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How Do Heat and Humidity Affect Your Roof?

Summer is officially here, and we all know what that means – hot weather and high humidity. You may be able to escape it, but your roof can’t. Heat and humidity can wreak havoc on your roof and cause costly damage. Your local roofer in Anne Arundel County can help you understand the effects of heat and humidity on your roof.

How Heat Affects Your Roof

The summer heat can seriously damage your roof. Continued exposure to high heat levels can cause materials to expand. This includes the roof structure, which can cause damage to the roofing material itself. It can also lead to cracks in the roof which will let water leak in and cause mold and mildew growth, which is not healthy for you or your family.


Another issue is that under high heat conditions, shingles can curl or crack. They are made to withstand a certain amount of expansion, but extended exposure to high heat can cause them to expand beyond their capabilities. This will lead to cracks in the material, as well as curling, both of which can let water in and cause damage to the roof structure and your home.

Flashing and Venting

The flashing around chimneys, vent pipes, roof valleys, vents, and so on, can also fail when exposed to high heat for a long time. Flashing is vital to keep water from seeping into your home and attic. Even the best flashing materials can be damaged by summer heat. This can lead to mold and mildew, damage to the roof structure, and water seepage into your walls and ceilings, causing damage to your home’s structure.


Damage to your roof can also cause heat to get into your attic, causing your HVAC system to work harder to cool your home. The heat can also cause damage by drying out the roof structure.

How Humidity Affects Your Roof

Humidity can adversely affect your roof in a number of ways. The first is water damage. This can not only cause mold and mildew growth, which can damage your roof decking but it is also a health hazard to you and your family.

Roofing Materials

It can also cause problems with your shingles, roof structure, and roof sheathing. It can weaken the plywood or other decking material causing soft spots, and rot and weaken the attachment of the shingles. It will also weaken the stability of the overall structure.

Mold and Mildew

Moisture can also get trapped in your attic, again, causing mold and mildew, damage to your insulation, and possibly damage to the drywall in your ceilings

Contact Your Local Roofer in Anne Arundel County

If you’re worried about possible damage to your roof, Just–In–Time Renovations, your ​​local roofer in Anne Arundel County. Their knowledgeable and friendly staff will help you with all your roofing needs. Whether you have asphalt shingles, a metal roof, slate, or cedar shakes, they’ll help you make the right choice for your roofing needs. Call them today at (443) 960-5513, or Click Here for a free estimate.

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