Flat Roofing · Torch-On · TPO · Low-Slope Systems
Flat Roofing Kelowna & West Kelowna
Flat and low-slope roofs need more than a surface membrane. West Country Roofing installs and repairs flat roofing systems with the drainage, seams, flashing, wall tie-ins, penetrations, and roof-edge details that protect homes, additions, garages, shops, and commercial buildings across Kelowna and West Kelowna.
Flat Roofing Systems
Built around the membrane, seams, drainage, and roof-edge details.
A flat roof performs as a complete waterproofing system. The membrane matters, but so do the seams, penetrations, parapet walls, scuppers, drains, slope, insulation, substrate, and metal details. We help determine whether torch-on, TPO, repair work, or a full replacement is the better path for the building.
SBS Modified Bitumen Systems
Torch-on roofing is a durable flat-roof option for low-slope areas where layered waterproofing, secure laps, and proper wall and edge transitions are critical.
Torch-on flat roofingSingle-Ply Membrane Roofing
TPO is a heat-welded membrane system often used on flat and low-slope roofs where clean seams, reflective surface options, and flexible detailing are useful.
TPO membrane roofingDrains, Scuppers & Slope
Ponding water is one of the biggest flat-roof concerns. Drainage, slope direction, scuppers, drains, and roof-edge flow need to be reviewed before replacement.
Drainage assessmentParapets & Transitions
Flat roofs often fail where the membrane turns up a wall, meets siding, wraps a curb, or ties into metal flashing. These areas need careful detailing.
Transition detailingVents, Curbs & Flashings
Flat-roof penetrations need waterproofing that works with the membrane system—not tar patches that crack, split, or hide a larger issue.
Penetration repairsFlat Roof Repairs
Leaks, splits, open seams, ponding, deteriorated flashings, and failing patches should be assessed before deciding between repair and replacement.
Flat roof repair optionsFlat Roof Replacement Process
A flat roof is inspected as a waterproofing system.
Flat roofing requires a different inspection mindset than steep-slope shingles. The surface membrane is only one part of the job. We review the roof deck, slope, drains, scuppers, wall transitions, edge metal, penetrations, insulation, and previous repair history before recommending a system.
Flat Roof Inspection
We look at membrane condition, seams, drainage, ponding areas, flashings, wall tie-ins, penetrations, edge metal, previous patches, and signs of trapped moisture.
System Recommendation
We determine whether repair, torch-on, TPO, added slope, new insulation, new drains, or a full flat-roof replacement is the better long-term option.
Substrate Preparation
The roof surface, deck, insulation, cover board, and tie-in areas need to be suitable before a new membrane is installed over the assembly.
Membrane Installation
Torch-on and TPO systems are installed with attention to laps, seams, corners, roof edges, curbs, drains, and penetrations—not just the open field area.
Drainage & Detail Review
Drains, scuppers, edges, wall transitions, and low spots are reviewed because water movement determines how well a flat roof performs over time.
Final Walkthrough
We check seams, edges, penetrations, flashing transitions, drainage details, cleanup, and project-specific workmanship before the roof is considered complete.
Flat roofing depends on the details you do not see from the ground.
The biggest flat-roof problems usually start at seams, drains, scuppers, roof edges, wall transitions, penetrations, corners, and low areas where water sits. A proper flat-roofing scope should identify those details before work begins.
Flat Roof Failure Points
Most flat roof leaks start at details, not the open field.
The middle of a flat roof can look fine while water gets in at a drain, seam, curb, wall, scupper, edge, or old repair. That is why flat-roof assessments need to follow the water path instead of only looking for obvious surface damage.
Open seams and laps
Flat roofing relies on secure seams. Open laps, stressed corners, failed patches, and poorly detailed transitions can let water move beneath the membrane.
Drain and scupper issues
Leaves, poor slope, undersized drainage, or low areas around drains can create ponding water and increase stress on the roofing system.
Parapet and wall tie-ins
Where the membrane turns up a wall, meets siding, or transitions into metal flashing, the detailing needs to handle movement, water, and weather exposure.
Vents, curbs, and roof penetrations
HVAC curbs, vents, plumbing stacks, skylight curbs, and exhaust penetrations need membrane-compatible flashing—not a quick surface smear.
Old patches and hidden moisture
Repeated patching can hide deeper problems. Soft areas, trapped moisture, blistering, and deteriorated substrate need to be identified before a proper repair or replacement is recommended.
Torch-On vs TPO
Choose the membrane that fits the roof, not just the price.
Torch-On Flat Roofing
- Common for residential flat roofs, additions, garages, and low-slope sections.
- Layered SBS modified bitumen system with strong waterproofing characteristics.
- Well-suited to many small and mid-sized flat-roof projects.
- Requires careful torch work, laps, corners, edges, drains, and wall tie-ins.
TPO Flat Roofing
- Single-ply membrane system with heat-welded seams.
- Often used for larger flat roofs, commercial-style sections, and clean membrane layouts.
- Can be mechanically attached or adhered depending on the roof assembly.
- Requires precise seam welding, penetration flashing, termination details, and drainage planning.
There is no one-size-fits-all answer for flat roofing. The right system depends on roof size, slope, drainage, existing material, access, substrate condition, insulation, penetrations, wall transitions, building use, and budget.
Flat Roofing FAQ
Clear answers before your flat roof project begins.
Do you install flat roofing in both Kelowna and West Kelowna?
Yes. West Country Roofing provides flat-roofing services in Kelowna and West Kelowna, including torch-on roofing, TPO roofing, flat roof repairs, membrane assessments, drainage details, and low-slope roof replacement.
Is torch-on or TPO better for my flat roof?
It depends on the building. Torch-on can be a strong option for many residential and smaller flat-roof areas, while TPO may be a better fit for some larger or more commercial-style low-slope roofs. The right answer depends on slope, drainage, substrate, penetrations, access, roof size, and tie-in details.
Can a flat roof be repaired instead of replaced?
Sometimes. If the leak is isolated and the surrounding membrane is still in serviceable condition, repair may make sense. If the roof has widespread seam failure, trapped moisture, recurring ponding, deteriorated substrate, or repeated patching, replacement may be the better long-term option.
What causes flat roofs to leak?
Common causes include open seams, failed patches, ponding water, blocked drains, cracked membrane, poorly detailed penetrations, wall tie-in failures, scupper issues, edge-metal problems, and hidden substrate deterioration.
Why is drainage so important on a flat roof?
Flat roofs are not truly flat; they need drainage direction. When water sits too long, it can accelerate membrane wear, stress seams, collect debris, freeze and thaw, and expose weak points in drains, scuppers, corners, and roof edges.
Can you inspect old flat roof patches?
Yes. Old patches often show where recurring problems have happened. We look at the patch, the surrounding membrane, the drainage path, nearby penetrations, seams, and substrate condition to determine whether the patch is still reliable or hiding a larger issue.
Do you work on residential and commercial flat roofs?
Yes. We can assess flat and low-slope roofs on homes, additions, garages, shops, small commercial buildings, and mixed roof systems. The recommended material and scope depend on the building and roof assembly.
How much does flat roofing cost in Kelowna or West Kelowna?
Pricing depends on roof size, access, existing material, tear-off requirements, substrate condition, insulation, slope, drains, scuppers, penetrations, wall tie-ins, selected membrane, and metal details. A site-specific assessment is needed for accurate pricing.
Plan your flat roof around the details that stop leaks.
Request a flat-roof assessment for torch-on roofing, TPO roofing, drainage problems, membrane leaks, roof-edge details, wall tie-ins, scuppers, drains, penetrations, and replacement options.