New Roof Installation Done Right — Guaranteed
GAF & CertainTeed certified installers serving Ottawa Valley & Lanark County. 10-year workmanship warranty on every replacement.
Signs You Need a Roof Replacement
Not sure if you need a repair or a full replacement? Here are the key indicators.
Roof is 20+ Years Old
Most asphalt shingle roofs last 20–25 years in Ontario's climate. If yours is approaching or past that age, replacement is likely more cost-effective than ongoing repairs.
Widespread Shingle Damage
Curling, cracking, or missing shingles across large areas of your roof indicate the material has reached the end of its lifespan.
Granules in Gutters
Excessive granule loss means your shingles are no longer protecting your home from UV and water. This is a clear sign replacement is needed.
Sagging or Structural Issues
A sagging roofline indicates potential deck or structural damage that requires immediate attention and typically a full replacement.
Repeated Leaks
If you are patching the same areas repeatedly, the underlying system has failed. A new roof is the permanent solution.
High Energy Bills
A failing roof allows heat to escape in winter and enter in summer, driving up your energy costs significantly.
Our Roof Replacement Process
Free Inspection & Quote
We inspect your roof thoroughly, explain exactly what we find, and provide a detailed written quote — no pressure, no surprises.
Material Selection
Choose from a range of GAF, CertainTeed, and Owens Corning shingles in styles and colours that complement your home.
Complete Tear-Off
We remove all existing layers down to the deck, inspect the sheathing, and replace any damaged sections before installing the new system.
Professional Installation
Ice & water shield, synthetic underlayment, proper ventilation, and precision shingle installation — every step done to manufacturer specs.
Cleanup & Final Walkthrough
We leave your property cleaner than we found it, then walk you through the completed work and warranty documentation.
Premium Roofing Materials
We install only manufacturer-certified products backed by full material warranties.
North America's largest roofing manufacturer. GAF Timberline shingles offer exceptional durability and a lifetime limited warranty.
Premium shingles with industry-leading warranties. CertainTeed's Landmark series is one of the most popular choices in Ontario.
TruDefinition Duration shingles with SureNail technology for superior wind resistance — ideal for Ottawa Valley weather.
Why Choose Clean Slate for Your New Roof
Roof Replacement — Common Questions
How long does a roof replacement take?
Most residential roof replacements in Ottawa Valley are completed in 1–2 days, depending on the size and complexity of your roof. We will give you a specific timeline in your quote.
How much does a new roof cost in Ottawa?
A typical residential roof replacement in the Ottawa Valley ranges from $8,000 to $20,000+ depending on roof size, pitch, material choice, and any deck repairs needed. We provide detailed written quotes so you know exactly what you are paying for.
Do I need to be home during the replacement?
You do not need to be home during the work, but we recommend being available at the start and end of the project for the walkthrough. We will keep you updated throughout the day.
What warranty comes with a new roof?
Every roof we install comes with a 10-year workmanship warranty from Clean Slate, plus the full manufacturer material warranty from GAF, CertainTeed, or Owens Corning — which can range from 30 years to lifetime depending on the product.
Can you replace my roof in winter?
Yes. We install roofs year-round in Ontario. Cold-weather installations require specific techniques and materials, and our team is experienced with all-season roofing.
Roof Replacement Across Ottawa Valley & Lanark County
Ready for a New Roof? Get Your Free Quote.
No pressure, no obligation. Just an honest assessment and a detailed written quote.