Membrane system selection
Choose SBS, TPO, PVC or another specified assembly for the project conditions.
Low-slope reroof
Flat Roof Replacement — SBS / TPO / PVC
Complete residential or commercial low-slope reroof using SBS, TPO, PVC or other specified membrane systems.
What is flat roof replacement?
Flat roof replacement removes or recovers a low-slope roof assembly and installs a new membrane system selected for drainage, substrate and project requirements.
Who this is for
Start with the condition, not the product
Owners with repeated membrane failures, wet insulation, obsolete systems or coordinated exterior renovations on low-slope roofs.
Flat roof replacement removes or recovers a low-slope roof assembly and installs a new membrane system selected for drainage, substrate and project requirements.
Common warning signs
- Multiple membrane failures
- Wet insulation
- Obsolete or unserviceable system
- Coordinated exterior renovation
- Chronic ponding with system-wide wear
Assessment discipline
What Revolin evaluates
- 01
Membrane type options
- 02
Insulation and substrate needs
- 03
Drains and scuppers
- 04
Parapets and penetrations
- 05
Access and protection
Typical causes
What often drives the need for this work
- Membrane end of life
- Insulation saturation
- Drainage design limits
- UV and thermal aging
- Penetration density with accumulated detail failures
Methodology
How Revolin approaches the work
- 01Assess assembly including wet components where investigation is warranted
- 02Select membrane strategy for the project
- 03Remove or recover as specified
- 04Install insulation and membrane layers in sequence
- 05Detail drains, parapets and penetrations as a system
Process
From enquiry to completion review
- 01
Assembly assessment, including moisture investigation where warranted
- 02
Membrane system selection and written scope
- 03
Removal or recover of the existing assembly as specified
- 04
Insulation and membrane installation in sequence
- 05
Drain, parapet and penetration detailing review
Materials & systems
Materials and detailing categories
- SBS, TPO, PVC or other specified membranes
- Insulation and cover boards as scoped
- Drain and flashing accessories
- Adhesives, fasteners or heat processes system-appropriate
Assembly replacement
Address membrane and related layers according to the approved scope.
Drainage and detailing
Drains, parapets and penetrations treated as core waterproofing work.
Metro Vancouver climate
BC weather shapes the failure mode and the detail
Low-slope roofs in rainy Metro Vancouver depend on drainage design and robust membrane detailing more than on marketing labels alone.
When this service is appropriate
When the low-slope assembly is exhausted or being renewed as part of a broader project.
When another service may fit better
Localized membrane repairs may still be viable on an otherwise sound system.
When repair may make sense
Repair if the membrane field is still viable.
When replacement may make sense
Full low-slope replacement when the system is exhausted.
Scope
What influences the work
The actual scope is established after assessment. Revolin Roofing does not publish a one-size-fits-all price, lifespan or assembly because those depend on the building and selected system.
- Area and geometry
- Membrane type
- Insulation needs
- Penetration density
- Access and disposal
Related services
Services often considered together
Low-slope membranes
Flat Roof Repair
SBS, torch-on, TPO/EPDM patching, flashing and penetration repairs on flat and low-slope roofs.
Transitions and interfaces
Flashing & Penetrations
Repair of chimney, wall, vent, pipe boot and other roof penetration flashings where water commonly enters Metro Vancouver roofs.
Condition first
Health Check
Inspection, photographs, minor sealant or maintenance work and a roof condition report for informed planning.
Active water entry
Emergency Leak Repair
Priority leak diagnosis — same-day when scheduling allows — with temporary or permanent localized repair when water is entering a Metro Vancouver home through the roof assembly.
Questions
Before you decide
What is flat roof replacement with SBS, TPO or PVC?
Flat roof replacement removes or recovers a low-slope roof assembly and installs a new membrane system selected for drainage, substrate and project requirements.
SBS, TPO or PVC — which flat roof membrane is best?
None is universally best. Two-ply SBS is the regional workhorse with robust redundancy; TPO and PVC are single-ply systems with heat-welded seams, lighter weight and reflective options, and PVC adds strong chemical resistance. Substrate, drainage, rooftop use and budget decide.
Should we tear off or recover the existing flat roof?
Recovering can save cost and disposal when the existing assembly is dry and sound, but wet insulation or multiple existing layers make tear-off the honest path. Moisture investigation before the decision protects you from sealing problems in.
How disruptive is a flat roof replacement?
Expect noise, odours during torch or adhesive work, staged material loading and protected access routes. Occupants can usually remain, and the written scope sets out sequencing, working hours and protection measures in advance.
Can drainage be improved during flat roof replacement?
Replacement is the right moment to correct chronic ponding: tapered insulation, added or relocated drains and scupper work can be designed into the new assembly rather than fought afterward.
Related project evidence
Before and after for this service
Roofing Transformation — Flat Roof Membrane Replacement
vancouver · Low-slope SBS membrane
Roofing Transformation — Commercial Flat Roof Replacement
richmond · Low-slope TPO membrane
Next step
Request a clear assessment of your roof
Tell us what you are seeing and where the property is. We will use that context to plan the right next conversation.
Call +1 (778) 851-0830