Is torch-on safe for occupied buildings?

Yes—when installed with a formal fire plan: torch-off zones, extinguishers, shields, and fire watch. In sensitive areas, we use self-adhered or cold-applied details.

Two-ply vs three-ply — which should I choose?

Two-ply offers excellent value; three-ply adds redundancy and toughness for hail/traffic. We’ll match the assembly to your building’s risk profile and budget.

Can you overlay instead of tearing off?

Often—if moisture is low, the deck is sound, and code allows. We perform cores/moisture scans to decide tear-off vs recover.

How long does an SBS torch-on roof last?

Properly designed SBS roofs commonly deliver 20–30+ years, especially with HD cover boards, tapered insulation, and a preventative maintenance plan.

Torch on Roofing SBS (Commercial)

SBS Torch-On Systems We Install

System	Configuration	Best For	SEO Keywords
Two-Ply Torch-On	Base (SA/mech) + Torch-applied granulated cap	Value, small–mid roofs, overlays	two ply sbs, torch down cap, self adhered base
Three-Ply Torch-On	Base + interply + torch granulated cap	High traffic, hail, longer lifecycle	three ply torch, interply sbs, heavy duty roof
Hybrid Low-Odor	Self-adhered base & details + torch cap in safe zones	Occupied or odor-sensitive facilities	self adhered sbs, cold process details, low odor roofing

Scope of Work (Typical SBS Replacement)

Roof Build-Up

Tear-off/recover, deck repairs as needed
Vapor barrier (as required by spec)
Tapered polyiso insulation layout
HD gypsum/polyiso cover board

Membrane & Flashings

Self-adhered/mech base + torch cap
SBS flashing at walls, curbs, parapets
Granulated cap sheet (color options)
Edge metal, expansion joints, boots

Drainage & QA

New drains/scuppers, sumps & saddles
Water test at critical details
Photo documentation & closeout
Maintenance plan & warranty

Typical Price Ranges (ballpark): Two-ply SBS: $6.50–$11.50/sq ft • Three-ply SBS: $8.50–$13.50/sq ft. Final pricing depends on tear-off, insulation thickness/taper, cover board, access, safety/torch controls, and detail complexity.

Our SBS Torch-On Installation Process (Step-by-Step)

Site audit: cores/moisture scan, insulation & drainage design
Safety & fire plan: torch-off zones, extinguishers, fire watch
Tear-off/recover per spec; deck and curb repairs
Vapor barrier (if required), tapered ISO, HD cover board
Base sheet (self-adhered/mech), interply (if 3-ply)
Torch-applied granulated cap sheet; seams & laps checked
Flashings at walls/parapets/curbs; edge metal & term bars
Drains/scuppers set; QA water-test, cleanup, maintenance plan

Industries & Buildings We Serve

Retail centers & offices
Warehouses & light industrial
Multifamily/HOA flat roofs
Healthcare & education campuses

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SBS Torch-On Roofing in Calgary — Two-Ply & Three-Ply Systems