Roof Washing & Moss Removal — Richmond BC

Soft Wash Roof Cleaning That Protects Your Warranty

Richmond roofs develop moss faster than almost anywhere else in Metro Vancouver. The city sits at sea level, receives over 1,100mm of annual rainfall, and tree canopy over many residential neighbourhoods keeps north-facing roof sections damp for weeks at a time. Moss thrives in exactly those conditions.

Left untreated, moss anchors into shingles with root-like structures that lift the adhesive seal between shingles. Water gets under during rain. Over several seasons, this leads to rot in the roof deck — repairs that cost far more than a decade of regular cleaning.

Why Soft Wash — Not Pressure Washing

The Canadian Asphalt Shingle Manufacturers' Association (CASMA) advises against pressure washing for asphalt shingles. High pressure strips the granule coating that protects the shingle mat from UV degradation — damage that cannot be reversed and may void your roof warranty.

Soft washing uses low pressure — typically under 100 PSI — combined with a diluted sodium hypochlorite solution. The chemistry kills moss, algae, and lichen at the biological level, rhizoids included. Growth dies within days. Rain naturally rinses the dead material off over the following weeks, with no mechanical stress on your shingles.

A properly treated Richmond roof stays clean for two to four years, depending on tree coverage and roof orientation.

What We Treat

• Asphalt shingles — low-pressure soft wash with calibrated SH solution
• Concrete tile — soft wash; no pressure on tile grouting
• Cedar shake — low-concentration treatment to preserve wood
• Metal roofing — soft wash; rinse to prevent chemical residue

Neighbourhoods We Serve

Steveston, Broadmoor, McLennan, Terra Nova, Hamilton, Seafair, Brighouse, Lackner, Quilchena, Ironwood, South Arm, Garden City — and Vancouver and Delta.

Frequently Asked Questions

How much does roof washing cost in Richmond?

Most Richmond residential roofs run $400–$800 depending on size, pitch, and access. We provide exact quotes after a free assessment.

How often should I clean my roof in Richmond?

Every two to three years in most Richmond neighbourhoods. North-facing sections under heavy tree cover may need attention more frequently.

Can roof cleaning be done during Stage 3 water restrictions?

Yes. Moss and algae removal qualifies as health and safety work under Metro Vancouver's by-law. We carry onboard water tanks for jobs during restriction periods.

Will soft washing damage my gutters or plants?

We pre-wet surrounding plants before application and rinse afterward. Gutters are unaffected by the solution concentrations we use on roofs.