Roofing Contractors
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About roofing services
Roofing covers everything involved in protecting the top of your home, from replacing worn asphalt shingles to installing a lifetime metal roof, repairing leaks, and correcting the ventilation and flashing that make a roof actually last. It is one of the highest-stakes systems in any house because a failure does not stay on the roof. Water finds its way into attics, insulation, ceilings, and walls, and by the time a stain appears on the ceiling, the damage above is usually well underway. A good roof is quiet infrastructure you rarely think about, which is exactly the point.
Homeowners generally face two roofing decisions: repair or replace, and which material to choose. Asphalt shingles remain the most common choice in Canada for their balance of cost and performance, while standing-seam and steel metal roofing have grown popular for their longevity, snow-shedding, and resistance to wind and fire. Other options include cedar, slate, and low-slope membrane systems for flat sections. The right answer depends on your climate, roof pitch, budget, and how long you plan to stay in the home. A quality contractor helps you weigh these rather than pushing a single product.
What separates a lasting roof from one that leaks in five years is rarely the shingle brand. It is the details underneath: proper underlayment, ice-and-water shield along eaves and valleys, correctly installed flashing at chimneys and walls, and balanced attic ventilation that lets heat and moisture escape. Poor ventilation cooks shingles from below and drives the ice dams that plague Canadian winters. Because so much of roofing quality is hidden once the job is done, choosing a contractor you can trust to do the unglamorous parts right matters more here than in almost any other trade.
Roofing services we cover
Asphalt shingle replacement
The most common re-roof: tearing off old shingles, inspecting the deck, installing underlayment and ice-and-water shield, then new architectural or three-tab shingles. Includes new flashing, drip edge, and ventilation as needed.
Metal roofing installation
Standing-seam and steel systems that shed snow, resist wind and fire, and can last decades. Installation demands precise panel work and detailing, and it costs more upfront but rarely needs replacing within a homeowner's tenure.
Roof leak repair
Tracing and fixing leaks, which usually originate at flashing, valleys, vents, or damaged shingles rather than in the open field. A proper repair finds the true entry point, not just the spot where water appears inside.
Flat and low-slope roofing
Membrane systems such as EPDM, TPO, or modified bitumen for flat sections, additions, and porches. These roofs rely on seamless waterproofing and proper drainage rather than the shedding action of a sloped roof.
Ventilation and ice-dam prevention
Balancing intake and exhaust ventilation and adding ice-and-water membrane to keep attics cool and dry. This prevents the ice dams and condensation that shorten roof life through Canadian winters.
Eavestrough and flashing work
Gutters, downspouts, and metal flashing direct water away from the roof edge and walls. Faulty flashing is behind a large share of leaks, so correct detailing here protects the whole system.
Signs you need a roofing pro
Curling, cracked, or missing shingles
Shingles that curl at the edges, crack, or blow off signal age and weathering. Bare patches or granules collecting in gutters mean the protective surface is wearing away and leaks are approaching.
Ceiling stains or attic leaks
Brown rings on ceilings, damp attic sheathing, or daylight visible through the roof deck all indicate active water entry that will spread if the source is not found and sealed.
Ice dams and heavy attic frost
Thick ice ridges at the eaves or frost on attic framing point to heat escaping and poor ventilation, a pattern that damages both shingles and the structure over repeated winters.
Age past twenty years
Most asphalt roofs last roughly fifteen to twenty-five years depending on quality and ventilation. If yours is nearing that range, an inspection now beats an emergency leak in the middle of winter.
What drives roofing cost
See the full cost guide →Roofing material chosen
Asphalt shingles sit at the affordable end, while metal, cedar, and slate cost substantially more but last far longer. Material is often the single biggest variable in a roofing quote.
Roof size, pitch, and complexity
Larger roofs use more material, and steep or cut-up roofs with many valleys, dormers, and skylights take longer and require more safety measures, all of which increase labour.
Tear-off and deck condition
Removing old layers and disposing of them adds cost, and if the crew finds rotted sheathing once the roof is open, replacing that decking is extra but necessary work.
Extras and detailing
New flashing, ventilation upgrades, ice-and-water membrane, skylights, and eavestrough work all add to the total. These details cost more upfront but are what make the roof actually last.
Top Roofing Contractors
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Concord, Ontario
Toronto's trusted renovation experts since 2009, kitchens, baths, basements & full home remodels across the GTA.
Calgary, Alberta
Calgary roofing specialists offering roof leak repair and metal roofing installation.
Roofing in Canada
Canada is a big market for roofing, and it is anything but uniform. With long winters across much of the country, work in Canada has to account for frost heave, ice and the swing between deep cold and summer heat.
Common roofing work ranges from ventilation and ice-dam prevention to asphalt shingle replacement. Provincial building codes and local permit rules differ across the country, which is exactly where a nearby contractor earns their keep.
NeedReno lists roofing contractors in provinces across Canada, so you can compare a few local quotes in Canadian dollars and hire someone who knows your area, using Canadian spelling and standards.
How to choose a roofing contractor
Roofing is a trade where licensing and insurance protect you directly, because falls and improper installs carry real risk. Requirements vary by province, so confirm your contractor holds the appropriate provincial or municipal licence and business registration, and always verify they carry both liability insurance and valid Workers Compensation coverage, WSIB in Ontario or the equivalent board elsewhere. Without that coverage, you can be exposed if a worker is injured on your property. Ask for proof rather than taking their word, and check that the company has a physical address and a track record you can look up.
Beyond the basics, look for manufacturer certification, since shingle makers such as certain brands train and authorize installers, and only certified contractors can offer the strongest workmanship warranties. Get detailed written quotes that specify the material, underlayment, ventilation plan, and flashing, not just a single price, so you can compare like for like. Be wary of storm-chasing crews that appear after a hailstorm, pressure you to sign immediately, or ask for large upfront deposits. A reputable roofer offers references, a clear warranty on both materials and labour, and a willingness to explain the parts of the job you will never see.
What to expect from a roofing project
Inspection and estimate
The contractor assesses the roof, deck, flashing, and ventilation, discusses material options, and provides a detailed written quote specifying what will be installed and any expected extras like decking repair.
Material delivery and site prep
Shingles and supplies are delivered, landscaping and siding are protected, and tarps and dumpsters are set to catch tear-off debris and keep the property safe during the work.
Tear-off and deck inspection
Old roofing is stripped down to the deck, exposing the sheathing so the crew can spot and replace any rotted or soft plywood before the new system goes on.
Underlayment and installation
Ice-and-water shield, underlayment, drip edge, and flashing are installed first, then shingles or panels are laid from the eaves up with proper fastening and ventilation.
Cleanup and final inspection
The crew clears debris, runs a magnet sweep for stray nails, and walks the finished roof to confirm flashing, ventilation, and detailing before providing warranty documentation.
Roofing: frequently asked questions
How long does a roof last in Canada?
It depends heavily on material and ventilation. Standard asphalt shingles typically last around fifteen to twenty-five years, architectural shingles a little longer, and metal roofs can exceed forty to fifty years. Canadian freeze-thaw cycles and ice dams shorten lifespan, so a well-ventilated roof with proper ice-and-water membrane consistently outlasts a poorly detailed one of the same material.
Should I repair or replace my roof?
Repair makes sense when damage is localized, the roof is relatively young, and the underlying deck is sound. Replacement is wiser when shingles are widely curling or bald, leaks recur in multiple spots, or the roof is near the end of its expected life. Paying repeatedly for patches on an aging roof usually costs more than a single replacement.
Is metal roofing worth the extra cost over shingles?
For homeowners staying long term, often yes. Metal costs more upfront but can last two to three times as long as asphalt, sheds snow, resists wind and fire, and rarely needs replacing. If you plan to move within a few years, the payback is smaller, and asphalt shingles may be the more sensible choice for your budget.
What causes ice dams and how do I prevent them?
Ice dams form when heat escaping into the attic melts snow, which refreezes at the cold eaves and traps water behind it. Prevention centres on keeping the attic cold: proper insulation, balanced ventilation, and sealing air leaks, plus ice-and-water membrane along the eaves so any backed-up water cannot penetrate the deck.
Can a new roof be installed over old shingles?
Sometimes it is allowed, and it saves on tear-off cost, but it is usually not recommended. Layering over old shingles hides deck problems, traps heat, adds weight, and typically shortens the new roof's life. A full tear-off lets the contractor inspect and repair the deck, and it is required if there are already two layers in place.
How long does it take to replace a roof?
Most residential asphalt roofs are completed in one to three days, depending on size, pitch, and weather. Complex roofs with many valleys, or metal and specialty materials, take longer. Weather delays are common in Canada, so contractors watch the forecast closely and will pause rather than install in rain that could compromise the underlayment.
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