A healthy roof is essential to protecting your home and maintaining its value—especially in a city like Markham, Ontario, where harsh winters, heavy rains, and seasonal storms can quickly wear down even a newer roofing system. At The Roofers, we’ve helped countless Markham homeowners identify and address early signs of roof damage before they turn into costly repairs.
Here are the top warning signs of roof damage every Markham homeowner should be aware of.
1. Missing, Cracked, or Curling Shingles
One of the most visible signs of roof damage is deterioration of the shingles. If you notice:
…it’s time to schedule a roof inspection. These are early indicators that your roof is aging or has suffered damage from high winds or UV exposure, both common in Markham’s variable climate.
2. Leaks and Water Stains
A leak is one of the clearest signs your roof may be compromised. Look for:
In neighborhoods like Unionville, Cachet, and Angus Glen, where many homes feature steep-pitched or complex rooflines, hidden leaks can go undetected without a professional assessment.
3. Sagging Roof Deck
If your roof appears uneven or you notice a sagging area, it could be a sign of structural damage due to:
A sagging roof is a serious concern and should be addressed immediately by a licensed roofing contractor.
4. Flashing Damage Around Chimneys or Skylights
Flashing—the metal or rubber seals around vents, chimneys, and skylights—plays a critical role in keeping water out. In older homes throughout Markham Village and Greensborough, flashing may corrode or detach over time, leading to leaks and moisture damage.
Common signs of flashing failure include:
5. Ice Dams and Poor Attic Ventilation
Markham winters often bring heavy snowfall followed by freeze-thaw cycles. Ice dams form when snow melts on a warm roof and refreezes at the edges, pushing water under shingles. This often results from:
If you see large icicles or ice buildup along the roofline, your attic and roof system may need attention.
6. Moss, Algae, or Mould Growth
Organic growth on your roof doesn’t just hurt curb appeal—it can cause long-term structural issues. Moss and algae trap moisture, leading to rot and shingle degradation. This is especially common in shaded areas of homes in Markham’s older neighborhoods, where trees overhang rooftops.
7. Rising Energy Bills
A damaged or aging roof can impact your home's energy efficiency. If you’ve noticed:
…it may be due to heat escaping through a deteriorated roofing system.
As a top-rated roofing company serving Markham and the GTA, The Roofers provide:
We understand the local building codes, weather conditions, and architectural styles that define Markham homes.
Don’t wait for a leak or storm to force your hand. If you’ve noticed any of the warning signs listed above, contact us today for a no-obligation inspection and expert advice on how to extend the life of your roof.
Call us at 416-858-0400 or request a free estimate online. The Roofers are your trusted local experts for roof inspections, repairs, and full replacements in Markham.
