The effect of heat on asphalt shingles

Asphalt shingles are a popular roofing material. They’re cheap, lightweight, easy to replace, and have a reasonable lifespan.

Heat impact is something that homeowners and property managers should be aware of during the summer. How much damage can the sun and the frequently high temperatures of the Pacific West Coast do to the shingles?

The shingles will deteriorate over time due to exposure to the elements. Extreme heat and sun exposure can accelerate this process, requiring you to replace shingles or the entire roof before the estimated roof life expectancy. 

What are some of the warning signs that your shingles are suffering from heat damage? 


When shingles become dry and rigid, they are more prone to cracking. Cracked shingles raise the possibility of moisture getting beneath the shingles and into the roof structure. 


Heat can cause shingles to shrink as well. When this happens, the nails that hold the shingles to the roof can come loose. Blisters form in the shingles, and when they pop, they expose the asphalt, making it vulnerable to further deterioration. They can cause leaks, just like any other type of roofing damage. 

Damage to flashing 

Metal flashing is more durable, but if your flashing is plastic flashing can pull away, stretch, and break as the roof joists expand in the heat. When the flashing on the roof is damaged, water can penetrate the roof, causing leaks and mould or mildew growth on the roof or the roof structure. 

How can you protect your roof from heat damage? 

The first step in preventing extreme heat damage to your shingles is to ensure that your roof is properly installed. 

Another option is to install shingles in a lighter colour. Black shingles absorb more heat and are more susceptible to damage. Installing lighter-colored shingles reduces heat absorption and can extend the life of your shingles. 

Proper ventilation in your attic is also essential. Ventilation allows heat to escape from the roof rather than accumulating and causing damage from the inside. 

Regular roof inspections ensure that minor issues do not escalate into major problems. When damage is discovered early on, it is often simple to replace single or small blocks of shingles. If the situation worsens, the entire roof may need to be replaced, which can be an unexpectedly high cost. 

Summer heat, followed by heavy fall rains, can wreak havoc on asphalt shingles if not properly maintained. Roof inspections once a year help to extend the life of your roof and can help you budget for any necessary repairs. They can also assist you in learning to identify potential problems and gain a better understanding of some of the issues to watch for in the future.

10 Reasons to have your Roof Inspected

Prevention is always cheaper than repair Here are 10 reasons to have your roof inspected. Some I'm sure you've never thought about. For such a critical part of your home, building or business why is it the last thing we think about? 10. Security. A roof hatch or a...

When you Should Hire a Roof Consultant

Avoid the leak in the roof The right roof consultant is a valuable partner in the proper design, construction, maintenance, repair, and replacement of roofs. While hiring a roof consultant involves a cost, skipping this critical step can cost far more later During the...

Importance of Choosing a Registered Roof Observer

You only want the best Unbiased, professional, authoritative – RCABC accepted roof observers at Phoenix Roof Consultants know their stuff. When roofing problems arise, when there’s a question about repairs or when someone needs to verify an installation is done...

BC Roof Inspections, BC Winter Rain

Winter Rain in BC can cause many problems. Roof inspections are the best way to prevent a leaky roof and roof damage In British Columbia, winter rain must be considered by every homeowner. It has a long-term effect on roofs and more importantly on the homes that roofs...

Top 5 roof tech (Materials) used in roofs

Whether you're building a new house or replacing a roof, there are a few recommended roofing materials or roof tech to consider. However, it can be difficult to determine which one is best for your house. This article will discuss some of the benefits of each...