5 Common Roofing Issues That Start in Summer (and How to Stop Them)

Advice

Jul 2

Summer in Toronto can be deceptively hard on your roof. While winter brings the obvious snow and ice damage, the combination of heat, UV rays, and heavy rainfall in summer can quietly cause problems that lead to expensive repairs later. At Top Roofers, we help homeowners stay ahead of the most common warm-weather issues before they escalate.

Here are five summer roofing problems to watch for—and how to prevent them:

Blistering Shingles

Excessive heat can cause asphalt shingles to blister or bubble. This not only looks bad but also weakens your roof’s protective layer, leaving it vulnerable to water damage.

Prevention: Have your roof inspected for early signs of blistering, especially if it's over 10 years old.

Moss and Algae Growth

Warm, damp conditions are ideal for moss and algae—especially on shaded or north-facing roofs. Over time, they retain moisture and can eat away at your shingles.

Prevention: Trim overhanging branches to reduce shade, and consider installing algae-resistant shingles.

Clogged Gutters from Spring Debris

Spring rain and wind often push leaves, twigs, and seeds into your gutters. If not cleared by June, clogs can lead to water backing up onto your roof during summer storms.

Prevention: Clean your gutters early in the season or hire a professional to do it safely.

Poor Ventilation

Hot attic air that can’t escape leads to higher energy bills and baked shingles. It also increases the risk of mold inside your home.

Prevention: Ensure your attic is properly ventilated. A roofing pro can assess whether additional vents are needed.

Storm Damage

Summer storms in Toronto can bring high winds and hail. These can rip off flashing or loosen shingles—sometimes without you noticing.

Prevention: After any storm, inspect your roof from the ground or book a professional inspection to catch damage early.

Need a summer roof inspection? Top Roofers offers fast, honest assessments and expert repairs to protect your home year-round. Contact us today.

Bruno Tremblay