Kitchener contractors see the same renovation mistakes over and over. Most of them are avoidable — and all of them are expensive to fix after the fact. Here are the seven that cost Kitchener homeowners the most money, frustration, and time on roof renovations.
Roofing over existing shingles
Adding a second layer of shingles is cheaper short-term but adds weight, hides damage, and shortens the new roof's life.
Choosing price over warranty
A 25-year shingle with poor installation fails faster than a 30-year shingle installed properly. Verify contractor warranty.
Skipping attic ventilation inspection
Improper attic ventilation causes ice dams, premature shingle failure, and voided manufacturer warranties.
Not replacing flashings
Reusing old flashing around chimneys, vents, and valleys is a frequent source of future leaks.
Ignoring the gutters
A new roof paired with failing gutters creates water infiltration at the fascia. Replace or clean gutters at the same time.
Off-season rush decisions
Emergency roof repairs after storms lead to overpriced work. If damage is minor, wait for competitive bids.
No written scope of sheathing inspection
Always get a written commitment for what happens if rotted sheathing is found during tear-off. Surprises here are expensive.
The Bottom Line
Most of these mistakes share a common thread: they're caused by rushing decisions, skipping steps that seem optional, or choosing cost savings in the wrong places. A roof renovation starting at $8,000 is a significant investment. Spending an extra $500–$2,000 to do it right protects the other $8K+.
Use the free Kitchener Roof Calculator to get a realistic budget estimate before talking to contractors — knowing the real numbers prevents many of these mistakes before they start.
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