Flat Roofing in Winnipeg
Low-slope membrane roofing for additions, garages, and commercial buildings, with drainage sorted out properly.
Flat roofs are common on Winnipeg additions, garages, apartment blocks, and commercial buildings, and Winnipeg Roof Pros works on all of them. They fail differently than sloped roofs: a shingle roof leaks where a detail has broken, and a flat roof leaks where water sat.
Drainage Comes First
A low-slope roof is designed to move water to drains or scuppers. When that stops working, water stands. The slope may never have been adequate, the structure may have settled, a drain may be blocked, or an addition may have changed how water runs.
Standing water finds every weakness in a seam, accelerates membrane wear, and adds real weight to the structure. Freeze-thaw makes it worse: water works into a seam, freezes, expands, and opens it further with each cycle through the winter.
That is why an assessment starts with where the water goes, not with the membrane. Recoating over a ponding problem is a repair that fails on schedule.
Details at the Edges
The field of a flat roof is rarely where trouble starts. It starts where the membrane meets something else: a parapet wall, a curb under rooftop equipment, a drain, a vent stack, or the edge metal.
Those transitions are where we spend the time, on both new work and repairs, because that is where flat roofs actually leak.
Most of our low-slope work is on commercial buildings and on residential additions and garages, where the pitch is too shallow for shingles to work.
What's Included
- Membrane systems suited to the building and how it is used
- Drainage assessed and corrected — ponding is the root problem
- Full detailing at parapets, curbs, drains, and penetrations
- Leak tracing and repair on existing flat roofs
- Residential additions, garages, and commercial buildings
Other Services We Offer in Winnipeg
Flat Roofing Questions
How long does a flat roof last?
It depends far more on drainage and detailing than on the membrane brand. A flat roof that drains properly and has sound flashing at its edges and penetrations lasts a long time. One that holds standing water after every rain does not.
Why does water pond on my flat roof?
Flat roofs are not truly flat — they are built with a slight slope toward drains or scuppers. Ponding means the slope is inadequate, the structure has settled, or the drains are blocked or badly placed. Fixing the drainage is the actual repair; recoating over a puddle is not.
Can a flat roof be repaired, or does it need replacing?
Localized damage, a failed seam, or bad flashing at a curb are all repairable. When the membrane has widespread cracking, blistering, or shrinkage, or when the insulation underneath is saturated, replacement is the honest answer.
Do you work on commercial flat roofs?
Yes. Low-slope commercial roofs are a normal part of our work, including assessments for building owners and property managers who need to know what shape a roof is in and what it will cost.
Get a Free Flat Roofing Quote
Book a free inspection and written quote. We tell you what we find, including when a repair will do the job.