Roofs in the UK face all types of weather, whether it’s strong winds, heavy rainfall or hailstones. We often think of icy conditions and winter weather as one of the main risk factors for our roofing, but did you know the heat can affect it too? This means it’s not just wind protection for roofs we need to consider.

With summer heatwaves just around the corner, let’s look at how excessive heat can affect your roof.

Can heat damage a roof?

Icy conditions can cause issues with your roof, especially if water expands within an existing crack, but what about the high temperatures we see during the summer?

Unfortunately, excessive heat can accelerate problems with your roof. This includes causing damage (such as blistering and cracking) to materials, deteriorating flat roofs further. Blistering occurs when there’s trapped moisture or air beneath the roofing layers, resulting in bubble-like protrusions or pockmarks.

You may even see missing tiles on a pitched roof if cracks start to form. If we have a rainy or humid summer, combining this with high temperatures can accelerate moss growth, lifting tiles and weakening them.

What happens to a roof during a heatwave?

During a heatwave, your roof will sometimes go through changes, depending on the condition and type of material in situ.

Roofs at the highest point of a property are vulnerable to UV rays, which contributes to the drying out of your roofing. If wooden roof elements experience shrinkage, over time, it could weaken them.

The sudden drop in temperature overnight during the summer can also cause issues, causing roofing membranes to expand and contract lots within a short space of time. The thermal shock experienced could lead to warping, affecting the structural integrity of your roof.

What are the first signs of roof damage?

If you notice anything untoward with your roofing, always contact a roofer to take a close look, as it’s often difficult to see what’s going on from the ground. Never climb up onto your roof, as it’s best done by those with the right safety equipment and training.

You can sometimes see something like a missing slate or tile from the ground, but blistering isn’t always apparent until a roofer confirms the issue up close. You may also notice the first sign of damage to your roof is property leaks if water is entering through your roofing or down the side of your home.

Maintain your roofing all year round

The best way to maintain your roof and ensure any heat damage is repaired without delay is to book regular roofing inspections. At South Thames Roofing, our experienced contractors can look after your residential or commercial roofing to ensure it remains in good condition all year round.

We work across South London and Surrey, coming out to Motspur Park, Wallington and Claygate. To get started, call now on 0208 397 2900.