Roofing Service
Four-Ply Roofing
A durable built-up roof assembly considered for commercial, industrial and multi-unit properties with low-slope roof areas.
System Overview
A Built-Up Assembly Planned Around the Existing Roof
Four-ply roofing is a built-up system formed with multiple reinforcing layers. The complete assembly can include insulation, vapour-control components, roofing felts, bitumen, surfacing and detailed flashing work based on the property and approved specification.
A site review helps establish whether a built-up approach suits the roof deck, existing assembly, drainage, access and operating conditions. Replacement planning should also account for removal, material handling and work around occupied areas.
Common project considerations
- Existing roof composition and removal requirements
- Roof deck condition and insulation needs
- Drainage, ponding and roof-slope conditions
- Perimeters, parapets, curbs and penetrations
- Material staging and occupied-building coordination
Project Planning
Plan the Full Assembly, Not Only the Surface
The best roofing recommendation starts with the building and the conditions below the visible roof surface.
- Confirm the existing assembly and deck conditions
- Review insulation, drainage and flashing requirements
- Compare suitable replacement-system options
- Define access, staging and disruption considerations
- Prepare a clear project scope for quotation
Next Step
Compare Four-Ply With the Other Suitable Options
Request an assessment to review the existing roof, project priorities and appropriate system choices.