How to Vet an Exterior Cleaning Contractor: 10 Questions to Ask

The lowest price and the shortest description rarely make the easiest project. Exterior work touches coatings, masonry, windows, landscaping, electrical fixtures, drainage systems, residents, vehicles, and public-facing areas. A qualified contractor should be able to explain how those variables change the plan.

Ten questions that reveal how the work will be managed

1. What insurance applies to this exact work?

Request current documentation and confirm that the named business and scope match the contractor performing the work. Property managers may also need specific certificate wording or additional-insured requirements.

2. Who will actually perform the work?

Understand whether the provider uses employees, subcontractors, or a combination. Ask who supervises the site, who communicates changes, and who remains accountable for the result.

3. How will the cleaning method change by material?

A credible answer distinguishes concrete from siding, stucco, brick, painted wood, roofing, glass, and metal gutters. “We pressure wash everything” is not a method statement. Use our material-specific cleaning guide to understand the differences.

4. What pre-existing conditions will be documented?

Cracked stucco, loose mortar, failed paint, oxidized siding, open joints, damaged screens, leaking gutters, and rotted trim should be identified before cleaning. This separates an existing defect from the cleaning outcome.

5. How will plants, fixtures, vehicles, and occupants be protected?

The plan should address pre-wetting and rinsing, sensitive surfaces, electrical components, open windows, furniture, parking, pedestrian routing, pets, residents, and any area that must remain operational.

6. How will runoff and overspray be managed?

Ask where water will travel, which adjacent materials could be affected, how slippery areas will be controlled, and what the crew will do if wind or site conditions change.

7. What access and fall-safety plan is required?

Multi-story work, gutters, steep grades, roof edges, and restricted courtyards change equipment and scheduling. The answer should be specific to the property, not an assumption that every surface can be reached from the ground or a basic ladder.

8. What is included—and specifically excluded?

Clarify whether gutter interiors, gutter faces, downspout testing, windows, screens, rust removal, oxidation, furniture movement, water access, and post-work rinsing are included. Precise exclusions prevent disputes and make proposals comparable.

9. How will completion be verified?

Ask who reviews the work, whether gutters receive a flow check, how missed areas are handled, and whether the client receives organized before-and-after photographs rather than a handful of unlabeled images.

10. Who communicates before, during, and after the visit?

Establish one contact for scheduling, access, scope changes, weather delays, completion, and corrections. This is especially important when owners are remote or multiple residents and buildings are involved.

Compare process, not just price

A higher proposal may include access equipment, plant protection, multi-stage cleaning, drainage verification, resident notices, and professional reporting that a cheaper scope omits. Normalize the bids by material, included area, method, protection, access, verification, and documentation before deciding which is truly more economical.