Two-ply SBS, torch-applied, on every flat plane you own.
The intersection
Mission's flat work is targeted — rear additions on downtown cottages, low-slope garages on rural properties, and the odd commercial rooftop in the downtown core, all on a steady cadence. Two-ply SBS modified bitumen, every seam torched twice, same as every city on our route.
Local intel
Mission's flat and torch-on demand runs lower than Surrey or Langley, but it's steady. Rear additions on downtown Mission cottages, where the addition roof is low-slope, are one bucket. Detached garages and small outbuildings on Silverdale and Hatzic acreage, where the old tar-and-gravel finally failed, are another. And the occasional commercial flat roof in the downtown core — small retail or an older office building — rounds it out. On every one it's two-ply SBS: full torch pass on the base sheet, every seam torched twice on the cap. Reflective granulated cap goes on the planes the sun hits, standard cap on the hidden sections. Winter torch work is tighter here than in Langley, because Cedar Valley and Stave Falls hit freezing more often — we watch the forecast and pause on cold snaps rather than hand over a bad seam. Wildfire on any rural property backing onto the treeline calls for a Class-A fire-rated cap sheet, which the SBS system carries when we spec the right cap. Parapet metal is wrapped and heat-welded on every flat roof with a raised edge. On a shop-plus-house property with a low-slope shop, we coordinate the shop torch-on with whatever asphalt or metal is going on the main house..
The detail
Base sheet mechanically fastened to the deck. Cap sheet fully torched over the top with an eight-inch overlap on every seam. Every seam gets a second torch pass to fuse the bitumen. Parapets and stack flashings wrapped and heat-welded so nothing's just tar-and-hope.
SBS handles freeze-thaw the way asphalt built-up systems never did. The modified rubber stays flexible in cold weather, so the membrane moves with the deck instead of cracking. That's what buys the 20-year warranty span.
Single-torch seams. Skipping the parapet wrap. Forgetting the drip metal at the eave. Any of those three, and your flat roof leaks within five years. We check for all three before the crew leaves the site.
Frequently asked
Yes. Low-slope shop roofs are regular Mission work. Two-ply SBS is the default, with a long-run metal option where the pitch supports it. We lay out both on the site walk with itemised pricing and lifecycle notes, so you can decide against the property's long-term plan. Every job carries the 10-year workmanship warranty.
Yes, with a proper fire watch. Two crew stay on watch during and for a full hour after every torch section, and everyone on the crew is WCB-certified for hot works. On a wildfire-interface property we add a layer: no torch work on high fire-danger days, and the watch is doubled on any property under Class-A rating requirements. Every step is documented for the closeout package.
We do. Not every week the way we're in Langley or Surrey, but a couple times a month. Site walks get scheduled in blocks so we're not billing you for the drive.
Yes. That's some of our favourite work. We'll spec the house on its own roofing system and the shop on its own, and we'll usually save you money by running both installs in the same site visit.
Up in the hills, yes. Cedar Valley and Stave Falls elevations see enough snow load that we go up on fastener spacing and use a heavier underlayment. Downtown Mission and the flats along the Fraser are closer to the standard Lower Mainland spec.
20 to 25 years on a well-installed two-ply SBS system. We've been called back to inspect our own 2011 installs and they still look tight. Cheap single-ply BUR systems tap out closer to 10 years, which is why we don't quote them.
Other options here
Same material, other cities
Mission · Flat / torch-on
Send Innovation Roofing your address or draw the outline of your roof. A named project manager will conduct the site walk, photograph every problem area, and return a written, itemised proposal within one business day — no call centre, no follow-up pressure.
WorkSafeBC registered · $5M liability · Licensed BC contractor · Written warranty on every project