Flat Roofing & Membrane Systems on Vancouver Island
Expert installations and specialized repairs for 2-ply SBS torch-on, authentic hot tar & gravel maintenance, EPDM rubber, and TPO single-ply commercial roofs.
Proven Flat Roof Systems for Coastal Buildings
Flat roofs require meticulous attention to drainage, scuppers, parapet flashing, and thermal expansion. Because water drains slowly on low-slope roofs, every seam must be watertight and chemically compatible with the substrate.
At P.W. McCallum Roofing, we bring decades of experience resolving complex commercial and residential low-slope challenges across Victoria, Saanich, Esquimalt, and Duncan.
Our Flat Roofing Systems
1. 2-Ply SBS Torch-On Bitumen
Industry Gold StandardA heavy-duty modified bitumen system heat-fused with an open flame torch to create an impervious waterproof layer. Features a granulated ceramic cap sheet that resists foot traffic and UV degradation. Ideal for residential additions, modern homes, and commercial entranceways.
2. Tar & Gravel Repairs & Maintenance
Specialist KnowledgeLarge numbers of older Victoria condos, apartment complexes, and strip malls have built-up tar & gravel roofs. Important Warning: If a roofer offers to repair your tar & gravel roof with torch-on membrane, be cautious. Torch-on is chemically incompatible with coal tar and will detach within a season. We provide authentic hot asphalt patching to seal leaks correctly.
3. Single-Ply EPDM & TPO Membranes
Commercial & Dead ValleysEPDM (synthetic vulcanized rubber) and TPO (thermoplastic polyolefin) single-ply membranes offer exceptional flexibility in cold weather and lightweight waterproofing for industrial flat roofs, Government St. commercial buildings, and intricate dead valleys.
Notable Flat Roof Restorations
Flat Roof Consultation
Have ponding water, blistering seams, or an active commercial flat leak? Speak directly with our membrane technicians.
Flat Roofing Services
- • 2-Ply SBS Torch-On System Installs
- • Tar & Gravel Hot Patching
- • EPDM Rubber Membrane Repairs
- • TPO Single-Ply Installations
- • Scupper & Internal Drain Inspections
- • Parapet Wall Metal Flashing
Need Experienced Roofing Advice or a Detailed Estimate?
Whether you are dealing with an active winter storm leak, planning a strata commercial membrane upgrade, or re-roofing a coastal home, our team provides honest assessments and proven craftsmanship.