Hamilton and Niagara
Flat roof repair in Welland
We repair, replace and maintain flat roofs in Welland: houses, garages and additions, condo and apartment buildings, plazas, offices and warehouses. Send photos and a few details for a written quote.
Flat roof services in Welland
Much of Welland's housing is older, and older houses often have flat roofs over rear additions, porches and garages. Typical signs are a stain on the kitchen ceiling, water at a skylight or a roof with several worn layers. We find where the water gets in, fix that spot and tell you how much life the rest of the roof has.
When a roof is past repair, we replace it with EPDM, TPO, PVC or modified bitumen, and fix the drainage so water does not sit on the new membrane. Owners and property managers also book inspections and maintenance visits.
Company towns and canal-side industry in Welland
Welland grew where the first Welland Canal crossed the river, and the village was incorporated in 1858. Plymouth Cordage opened its Canadian plant in 1904, and Atlas Steel became a major steel plant. Union Carbide, a cotton mill and three drop forges were also early employers. Company-built neighbourhoods such as the Plymouth Cordage Heritage District and Dain City housed workers. The Welland By-Pass, built from 1967 to 1973, moved the canal out of downtown. Census data show about 66% of homes were built before 1981 and 36% before 1961.
In the downtown core, around Civic Square, and in older east and west side streets you find brick houses and storefronts of the early industrial era, often with flat roofs over rear additions. Crowland and Dain City, a company town built around the Dain Manufacturing Company, have their own older streets. Hunters Pointe, near the By-Pass, is newer. Along the canal and old industrial sites, the legacy of steel, forging and pipe plants means large low-slope industrial roofs of several different ages.
Welland weather and your flat roof
Ontario's Building Code sets the climate values used to design roofs in each municipality. They show what a flat roof in Welland has to handle.
- 2 kPaGround snow load (about 42 lb per sq ft)
- 0.4 kPaRain load added to snow (Sr)
- 23 mmRain in a 15-minute storm (design value)
- 103 mmRain in one day, 1-in-50-year storm
- -15 °CJanuary design temperature
- 3,670Heating degree-days per year
- 0.43 kPaHourly wind pressure, 1-in-50-year
That snow load is about 2.2 times the Toronto figure. Snow drifts against parapets, walls and rooftop units, and the weight sits on the roof for weeks. Drains that freeze shut leave meltwater nowhere to go.
Short summer storms can still drop 23 mm of rain in 15 minutes, so drains and scuppers have to be clear and sealed.
Environment and Climate Change Canada climate normals (1991–2020) record about 141 cm of snowfall a year at the Welland station.
Source: Ontario Building Code, Supplementary Standard SB-1, Table 1.2
Homes and buildings in Welland
The age and type of buildings shape the flat roofs we see. These are the 2021 Census figures for Welland.
- 66%Homes built before 1981
- 15%Homes built since 2001
- 72%Detached and semi-detached houses
- 4%Row houses and townhouses
- 6%Apartments in buildings of 5+ storeys
- 31%Households that rent
About 66% of homes in Welland were built before 1981, more than in 31 of the 40 Ontario cities on this site. Older houses often have flat roofs over rear additions, kitchens and porches, sometimes with two or three layers of old roofing on top of each other. Replacing one usually starts with a full tear-off and a look at the wood deck underneath.
Welland: facts for property owners
- Population of Welland: 55,750 (2021 Census). Source
- Welland is part of the Regional Municipality of Niagara.
- Sewage Water Alleviation Program (SWAP): Grant up to $7,500 for devices protecting against basement flooding (e.g. up to $1,500 for backwater valve). Source
Rules and programs change. Confirm current details with the municipality before you start work.
Starting prices in Welland
| Item | Starting price |
|---|---|
| Small leak repair (patch, seam or puncture) | from $350 per repair |
| Small flat roof replacement (garage, porch or addition) | from $4,000 per roof |
| House flat roof replacement (about 1,000 sq ft) | from $8,000 per roof |
Starting prices in CAD before 13% HST, based on typical Ontario contractor rates (mostly Toronto and the GTA). The final price depends on roof size, access, the layers to remove, the membrane, drains and flashings, and is confirmed in your written quote.
See all prices.
Roofs we work on in Welland
Flat roofs in Welland: questions
How much does flat roof repair cost in Welland?
A small leak repair starts from $350 per repair and a new house flat roof starts from $8,000 per roof. Prices in Welland depend on access, layers to remove and the membrane. See pricing.
Why does my flat roof in Welland leak in late winter?
Melting snow refreezes at drains and edges overnight, then backs up under seams and flashings during the day. See ice and snow damage.
Do I need a permit to replace a flat roof in Welland?
Check with the Welland building department. Replacing the membrane alone is often treated differently from structural work, a new rooftop deck or added weight. See re-roofing permits in Ontario.
My Welland house is older. Can the flat roof go on over the old one?
Sometimes one new layer can go over one old layer, but on older houses we often find two or three layers already, wet insulation or soft deck boards. Then a full tear-off is the safer choice. See repair or replace.
Do you also work near Welland?
Yes, including Niagara Falls, St. Catharines, Hamilton and the rest of Hamilton and Niagara. See Hamilton and Niagara.
Leak, damage or an old flat roof?
Send a few details and photos. We reply by email with next steps and a written quote.