Commercial buildings in Surrey BC require regular roof inspections to maintain BC Building Code compliance, protect tenant assets, and support insurance requirements. A commercial roof inspection is more comprehensive than residential — here is exactly what it covers, how much it costs, and how often it should be done.
Commercial roof inspection: 236-838-9577 — I-M Roofing, licensed commercial roofing contractor in Surrey BC.
Commercial Roof Inspection Costs — Surrey BC 2026
| Building Type | Inspection Cost | What’s Included |
|---|---|---|
| Small commercial (under 500 sqm flat) | $500–$900 | Visual + core sampling, written report |
| Mid-size commercial (500–2,000 sqm) | $900–$2,500 | Full visual, drain flow test, 3–5 core samples |
| Large commercial / strata (2,000+ sqm) | $2,500–$6,000+ | Full inspection, infrared scan (optional), prioritized repair plan |
| Annual maintenance inspection (existing client) | $400–$800 | Abbreviated report, focused on change since last inspection |
What a Commercial Roof Inspection Covers
Membrane Condition
For torch-on, TPO, and EPDM flat roofs: visual inspection of the full membrane surface for blisters, cracks, punctures, and lap seam separations. Core samples (typically 3–5) are taken to check the insulation layer beneath the membrane for moisture saturation — wet insulation must be replaced or it accelerates membrane failure from below.
Drainage System
Every drain, scupper, and overflow is inspected and flow-tested. Blocked commercial drains in Surrey BC’s rainy season create ponding water that can exceed the structural load rating of the roof deck. We also check that drain collars are properly sealed to the membrane.
Parapet Walls and Cap Flashing
Parapet walls are the most common source of water intrusion on Surrey BC commercial flat roofs. The cap flashing (metal or membrane) at the top of the parapet must be sealed continuously. Any crack, gap, or separation here allows water to run behind the membrane at the wall-to-roof junction.
All Penetrations
HVAC curbs, pipe stacks, skylights, vents, and any roof penetration must have properly installed and intact flashing collars. On older Surrey BC commercial buildings (1980s–2000s), these are common failure points.
Written Report
All commercial inspections include a written report with photos, condition assessment for each area, and a prioritized repair list with estimated costs. This report supports insurance requirements and strata council capital planning.
How Often Should a Commercial Roof Be Inspected?
Minimum twice per year — once in spring (after the rainy season) and once in fall (before it). Buildings with older membranes (10+ years), high foot traffic, or HVAC equipment on the roof should be inspected 3–4 times per year.
Related Services
- Commercial Roofing Surrey BC — full commercial roofing service
- Flat Roof Repair Surrey BC — TPO, torch-on, EPDM repair costs
- Licensed Roofer Surrey BC — WorkSafeBC, $5M liability
Call 236-838-9577 for commercial roof inspection across Surrey, Langley, Delta, Burnaby, and Coquitlam BC.
