Roof Labs — Surface Intelligence
Questions to Ask Before Hiring a Roof Cleaner in BCThe right questions reveal everything about a roof treatment contractor. Professional biocide specialists answer these questions confidently and specifically. Contractors who can't answer them — or who give vague, deflecting answers — should not be handling your roof.
Roof Labs Canada(250) 889-8490
Vancouver Island · Gulf Islands · BC

Questions to Ask Before Hiring a Roof Cleaner in BC

The Complete Pre-Hire Checklist for Vancouver Island Homeowners

No Roof WalkingNo Wire Brushes2-Year Warranty$0.25–$0.90/sqft
250-889-8490
9+
Years Operating
966+
Roofs Treated
500+
5-Star Reviews
6yr
Max Protection

The right questions reveal everything about a roof treatment contractor. Professional biocide specialists answer these questions confidently and specifically. Contractors who can't answer them — or who give vague, deflecting answers — should not be handling your roof.

Questions About Method and Product

(1) "What application method do you use — soft washing, pressure washing, or something else?" The only correct answer for professional roof treatment is soft washing (under 200 PSI). (2) "What biocide product do you use, and what is the active ingredient?" Professional applicators should name their product and active ingredient (common: potassium salts of fatty acids, didecyl dimethyl ammonium chloride, benzalkonium chloride). (3) "What is your application PSI?" Under 200 PSI is correct. Over 500 PSI on shingles is unacceptable. (4) "Do you walk on the roof during treatment, and if so, how?" Should explain minimisation of roof contact and the use of extendable application equipment.

Questions About Credentials and Guarantee

(5) "Can you provide proof of $2M+ commercial liability insurance?" They should send a COI (certificate of insurance) without hesitation. (6) "Do you have WCB coverage for your workers?" Should be immediate yes with coverage number available. (7) "What is your written guarantee, and what exactly does it cover?" Should state: 2 years, covers return of biological growth, free re-treatment. (8) "How long have you been operating on Vancouver Island?" Look for established track record with verifiable review history. (9) "Can you provide references from similar properties in this area?" Should be able to provide 2–3 recent local references.

Frequently Asked Questions

What if a contractor refuses to answer these questions?

Consider it disqualifying. Professional contractors answer specific questions about their method, products, and credentials willingly — it's how they demonstrate expertise and win work. Vague or evasive answers indicate either inexperience or an attempt to obscure the actual service being delivered.

About Roof Labs Canada

Roof Labs Canada provides roof treatment, moss control, black streak treatment, and soft washing for Vancouver Island and the Gulf Islands. As Roof Labs Canada, we bring marine-engineered formulas, 9+ years of island experience, and a written 2-year guarantee to every project.

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2-YEAR

NEW GROWTH WARRANTY

— Vancouver Island & Gulf Islands

250-889-8490

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500+ Five-Star Reviews

Verified customers across Vancouver Island

2-Year Written Guarantee

Free return if moss comes back

9+ Years Island Experience

966+ roofs treated

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250-889-8490

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Contact Information

Service Area

Greater Victoria, BC
Sidney, Saanich, Langford
and surrounding areas

Business Hours

Monday - Friday: 8:00 AM - 6:00 PM

Saturday: 9:00 AM - 4:00 PM

Sunday: Closed

Emergency services available 24/7