Straight answers to the questions London building owners and property managers ask us most.
It's priced per square foot and depends on the system, roof size, whether we tear off or recover, insulation, and roof access. There's no honest one-size number — that's why we do a free assessment and give you a written, itemized quote.
If the membrane is sound and the issue is localized, we repair. If you're repairing the same spot repeatedly, the roof is near end-of-life, or the insulation is wet, a replacement is cheaper long-term.
TPO is reflective and lowers cooling costs; EPDM is a proven rubber membrane that excels in cold. It depends on your building — see our TPO & EPDM page.
Yes — 24/7 emergency response for active leaks, storm damage, and snow load across London and Middlesex County.
Fully insured, WSIB-compliant, IHSA safety protocols. Installs carry manufacturer material warranties plus our workmanship warranty.
A few days to a couple of weeks depending on size, system, and weather. Large facilities are phased to keep you operating.
The things homeowners and building owners here ask us about our climate, the building code, and getting a roof through a Southwestern Ontario winter.
Like-for-like re-roofing — replacing shingles or membrane without structural changes — generally doesn't require a permit from the City of London. Structural work, replacing the roof deck or sheathing, or altering the roof usually does. Always confirm with the City of London Building Division before work starts.
Ice dams form when heat escaping into the attic melts roof snow, which then refreezes at the cold eaves and backs water up under the shingles. You prevent them with proper attic insulation, balanced ventilation, and ice-and-water shield at the eaves — the details a correctly built London roof includes.
Architectural asphalt shingles typically last 20–30 years, but London's freeze-thaw cycling and wide temperature swings shorten that if the attic is poorly ventilated. Metal roofs commonly last 40–50+ years. Good ventilation is the single biggest factor in how long a roof lasts here.
Yes. The Ontario Building Code requires eaves protection such as ice-and-water shield in cold, ice-dam-prone climates like London. We install it as standard at the eaves and valleys.
The Ontario Building Code calls for roughly one square foot of net free vent area for every 300 square feet of insulated attic — the 1-in-300 rule — balanced between intake at the soffits and exhaust near the ridge. Under-venting is a leading cause of attic condensation and ice dams in London.
A properly draining flat roof clears standing water within about 48 hours. Persistent ponding points to a drainage, slope, or clogged-drain problem, and standing water accelerates membrane and seam failure. Worth addressing before it turns into an interior leak.
Spring through fall is ideal, when temperatures let shingles and membranes seal properly. We install year-round when needed and handle winter emergencies, but planned replacements are best scheduled in the warmer months.
Sudden storm, wind, and ice damage is often covered; gradual wear, age, or neglect usually isn't. Photograph the damage inside and out and call us for a documented assessment to support your claim.