SBS Modified Bitumen System
SBS (styrene-butadiene-styrene) modified bitumen is a flexible, layered roofing system built to handle Calgary’s coldest months without cracking or losing its seal. It’s a strong fit for sloped roofs that need extra resilience against freeze-thaw cycles and heavy snow load. Our team installs, repairs and replaces SBS systems for residential and commercial properties across the greater Calgary area.
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SBS Roofing For Calgary Homes & Businesses
SBS has been a reliable choice in northern climates for decades. Its rubberized asphalt formulation provides strong waterproofing and holds up through the expansion and contraction that comes with Calgary’s temperature swings.

SBS Installation
Our certified technicians install SBS systems built to create a strong, watertight bond between membrane layers and the substrate. SBS installation works well for most residential and commercial sloped roofs.

SBS Repairs
SBS roofs can develop issues at seams, flashing and around penetrations over time. Our crew identifies the source of leaks and applies compatible patches and sealants, restoring the membrane’s integrity and adding years to your roof’s lifespan.

Full System Replacement
When your SBS roof has reached the end of its service life, we handle complete tear-off and replacement. Our team removes the old membrane, inspects the deck for damage, upgrades insulation if needed and installs a new SBS system built for long-term performance.
Why Choose Crownshield Roofing Services?
SBS installation requires trained technicians who understand proper substrate preparation and seam sealing. Our crew has the certifications and experience to install SBS systems correctly on sloped roofs. We take care to protect your property during installation and deliver clean, professional results.
Get an SBS QuoteIs Your Modified Bitumen Roof Aging?
SBS modified bitumen typically lasts 20 to 25 years with proper maintenance. Signs that your roof needs attention include visible cracks or alligator patterns in the surface, seams that are lifting or separating, blisters or bubbles in the membrane and granule loss exposing the asphalt layer beneath. Our team provides free inspections to assess your SBS roof’s condition and recommend next steps.
