Moss growth is one of the most common roofing problems in Surrey BC. Our damp, mild climate creates ideal conditions for moss and algae to establish on asphalt, cedar, and concrete tile roofs — and if left untreated, moss can significantly shorten your roof’s lifespan.

Why Moss is Dangerous for Surrey Roofs

• Moisture retention — Moss holds water against shingles, accelerating deterioration and granule loss
• Shingle lifting — Moss roots grow under shingle edges, creating entry points for water
• Decking damage — Prolonged moisture from moss can rot the plywood decking beneath shingles
• Warranty issues — Heavy moss growth may void manufacturer shingle warranties
• Gutter clogging — Dead moss flushes into gutters and causes blockages

I-M Roofing’s Moss Removal Process

1. Roof inspection — We assess moss coverage and any underlying shingle damage
2. Soft-wash treatment — We apply a biodegradable moss-killing solution at low pressure to protect shingles (never pressure wash)
3. Rinse and clear — Dead moss is carefully removed without damaging granules
4. Gutter clean — Gutters checked and cleared of debris from the treatment
5. Preventive treatment — Zinc or copper strips installed at the ridge to prevent regrowth

Moss Prevention for Surrey BC Roofs

• Zinc strips — Installed at the ridge, zinc ions wash down with rain to inhibit moss growth
• Algae-resistant shingles — Copper granules in the shingle surface resist moss and algae
• Tree trimming — Reducing overhanging branches reduces shade and debris that encourage moss
• Annual inspection — Catch early moss growth before it becomes established

How Often Should Surrey Roofs Be Treated for Moss?

In Surrey’s climate, we recommend a moss treatment every 2–3 years for asphalt roofs. Cedar shake roofs may need annual treatment and oil conditioning to prevent premature deterioration.

See also: Roof Cleaning Surrey BC | Roof Inspection Surrey BC | How Long Does a Roof Last Surrey BC

📞 Call 236-838-9577 for moss removal and prevention in Surrey BC
📍 I-M Roofing Ltd. — 15482 86A Ave, Newton, Surrey BC V3S 2R6