Trade certifications
Pressure-Washing Service Certifications Beyond Licensing
State and local licenses tell you whether a contractor can operate in pressure-washing service work, but they rarely show specialty depth. These certifications highlight safety training, manufacturer authorization, code knowledge, diagnostic skill, and third-party trade credentials homeowners can ask to verify before hiring.
Credentials to verify
PWNA House Washing Certification
Power Washers of North America
- What it proves
- This cleaning credential verifies residential exterior washing, soft-wash methods, chemical dilution, siding awareness, plant protection, rinsing, safety, and customer communication. It signals that the person or firm completed a recognized exam, training, or credentialing process and can explain the documented methods behind the work. It does not replace state licensing, permits, insurance, or manufacturer warranty requirements.
- Who should have it
- Pressure-washing technicians cleaning siding, trim, soffits, and exterior surfaces.
- How to verify
- Ask for the PWNA certificate and confirm the course title with Power Washers of North America.
PWNA Roof Cleaning Certification
Power Washers of North America
- What it proves
- This roof cleaning credential verifies low-pressure cleaning, algae and moss treatment, chemical handling, fall hazard awareness, shingle protection, runoff control, and safety. It signals that the person or firm completed a recognized exam, training, or credentialing process and can explain the documented methods behind the work. It does not replace state licensing, permits, insurance, or manufacturer warranty requirements.
- Who should have it
- Pressure-washing and roof-cleaning technicians cleaning asphalt shingles or roof surfaces.
- How to verify
- Ask for the PWNA roof cleaning certificate and require a written no-high-pressure roof method.
PWNA Flatwork Certification
Power Washers of North America
- What it proves
- This cleaning credential verifies driveway, sidewalk, and concrete surface cleaning, surface cleaners, chemical selection, runoff control, stain awareness, safety, and production methods. It signals that the person or firm completed a recognized exam, training, or credentialing process and can explain the documented methods behind the work. It does not replace state licensing, permits, insurance, or manufacturer warranty requirements.
- Who should have it
- Pressure-washing crews cleaning driveways, patios, sidewalks, and concrete flatwork.
- How to verify
- Ask for the PWNA flatwork certificate and confirm the crew has a wastewater plan.
PWNA Wood Restoration Certification
Power Washers of North America
- What it proves
- This wood cleaning credential verifies deck and fence washing, brightening, stripping, neutralizing, pressure control, wood-fiber protection, chemical safety, and restoration sequencing. It signals that the person or firm completed a recognized exam, training, or credentialing process and can explain the documented methods behind the work. It does not replace state licensing, permits, insurance, or manufacturer warranty requirements.
- Who should have it
- Pressure-washing contractors cleaning, stripping, or preparing decks and fences for stain.
- How to verify
- Ask for the PWNA wood restoration certificate and request sample prep steps in the written scope.
UAMCC Wash Water Control Certification
United Association of Mobile Contract Cleaners
- What it proves
- This environmental cleaning credential verifies wastewater awareness, containment options, storm drain protection, filtration concepts, compliance communication, job planning, and documentation. It signals that the person or firm completed a recognized exam, training, or credentialing process and can explain the documented methods behind the work. It does not replace state licensing, permits, insurance, or manufacturer warranty requirements.
- Who should have it
- Pressure-washing contractors working near storm drains, commercial sites, or regulated runoff areas.
- How to verify
- Ask for the UAMCC certificate and require the runoff-control method in the estimate.
OSHA 10-Hour Construction
OSHA Training Institute Education Centers
- What it proves
- This safety credential covers basic construction hazards, fall prevention, electrical awareness, struck-by and caught-between risks, PPE, hazard communication, and worker rights for field crews. It signals that the person or firm completed a recognized exam, training, or credentialing process and can explain the documented methods behind the work. It does not replace state licensing, permits, insurance, or manufacturer warranty requirements.
- Who should have it
- Field technicians, installers, helpers, and crew leads on residential job sites.
- How to verify
- Ask to see the Department of Labor OSHA card and compare the name, course, trainer, and completion date.