I-M Roofing Ltd. provides professional roof cleaning in Surrey, BC — soft-wash moss removal, algae treatment, zinc strip application, and debris clearing. Surrey’s wet climate makes roof cleaning not just cosmetic but essential: untreated moss penetrates shingles, retains moisture, and significantly shortens roof life.
Free roof cleaning estimate: 236-838-9577
Roof Cleaning Cost in Surrey BC — 2026
| Service | Cost Range (Surrey 2026) | Notes |
|---|---|---|
| Soft-wash moss treatment (1-storey home) | $400 – $650 | Chemical treatment; moss dies over 4–8 weeks |
| Soft-wash treatment (2-storey home) | $600 – $900 | Same process; additional access and safety equipment |
| Zinc strip application (per linear foot) | $3 – $6/linear ft | Long-term moss prevention (5–10 year protection) |
| Debris and leaf clearing (gutters + roof) | $150 – $350 | Often combined with moss treatment |
| Bundle: soft-wash + zinc + gutter clean | $700 – $1,100 | Best value for complete roof maintenance visit |
How Roof Cleaning Works in Surrey BC
1. Soft-Wash (Recommended)
We apply a biodegradable biocide solution to the roof surface. The chemical kills the moss and algae at the root level. Over the following 4–8 weeks, dead moss loosens from the shingles and washes off with Surrey’s natural rainfall. No pressure washing, no granule damage, no voided manufacturer warranty.
2. Zinc Strip Application
After cleaning, we install zinc strips along the ridge (and sometimes lower courses on north-facing slopes). When it rains, zinc ions leach down the roof, creating an environment hostile to moss re-establishment. Effective for 5–10 years depending on rainfall and exposure.
Why Pressure Washing is Wrong for Surrey Roofs
Pressure washing removes moss quickly but also removes granules from asphalt shingles — granules are the UV protection for the asphalt base. Every pressure wash removes years of shingle life. All major shingle manufacturers (GAF, IKO, Owens Corning) explicitly state that pressure washing voids the shingle warranty. We do not pressure wash asphalt shingle roofs.
How Often Should You Clean a Roof in Surrey BC?
Typically every 3–5 years for soft-wash treatment, or when you see active green moss coverage beginning to establish. With zinc strips in place, treatment intervals can extend to 5–10 years. North-facing slopes in tree-shaded Surrey properties may need more frequent attention.
Related Services
Free roof cleaning estimate: 236-838-9577
