A solid warranty or guarantee on roof soft washing work is what separates a trustworthy contractor from one who disappears after cashing your check. Before hiring anyone to spray your roof or siding, you need to understand what protection you're actually getting and what happens if the results don't hold up.
What Soft Washing Warranties Actually Cover
Soft washing warranties typically fall into two categories: workmanship guarantees and cleaning results guarantees. A workmanship guarantee protects you if the contractor damages your roof, siding, or landscaping during the job—like cracking shingles, breaking gutter seams, or killing foundation plants. A cleaning results guarantee promises the surfaces stay clean and algae-free for a set period, usually 12 months.
The catch? Not all contractors offer both, and the fine print matters. Some will only guarantee results if you maintain the property yourself—meaning you're partially responsible if algae returns quickly. Others explicitly exclude pre-existing damage or structural issues that contributed to the original staining.
Standard Warranty Terms in the Industry
Most reputable soft washing companies offer one-year satisfaction guarantees, though some extend to two years for premium packages. Here's what you'll typically encounter:
- 12-month standard guarantee: Contractor returns to clean problem areas at no charge if algae, mold, or mineral deposits return within one year
- 2-year warranties: Higher-end providers; often includes one complimentary refresh cleaning
- Workmanship coverage: Usually covers 2–5 years for damage caused by the cleaning process itself
- Limited guarantees: Budget companies may only cover visible damage, not slow-developing issues like roof deterioration
If a contractor won't put their guarantee in writing, that's a red flag. You want it in your contract—not a verbal promise.
Limitations You Should Know
Real warranties have boundaries. Most exclude:
- Damage from weather events (storms, hail, heavy rain within 48 hours of cleaning)
- Pre-existing roof or siding damage that accelerates deterioration
- Failure to follow post-cleaning care instructions (like preventing foot traffic on fresh surfaces)
- Areas not covered by the original quote
- Staining from external sources you didn't disclose upfront (like roof vents, flashing, or gutter overflow)
Some contractors also won't guarantee results on roofs over 20 years old or surfaces with significant biological growth that requires multiple treatments. Ask specifically about these limitations before signing.
How to Verify Guarantee Terms
When comparing quotes, ask each contractor these questions:
- What exactly does your guarantee cover—workmanship, results, or both?
- What's the time period, and does it start from the completion date?
- What voids the guarantee (weather, homeowner negligence, structural issues)?
- How do I request a warranty claim? What's the response time?
- Is the guarantee transferable if you sell your home?
Request the guarantee in writing as part of your contract. If they hand you a generic form, cross-reference it against what they promised verbally. Discrepancies are common, and you want the stricter version in your favor.
Extended Warranties and Maintenance Plans
Some contractors bundle warranties with ongoing maintenance. A typical package costs $100–$300/year and includes quarterly inspections or one annual touch-up cleaning. These make sense if you're in a humid climate with rapid algae regrowth or have tall trees overhead.
Others offer paid extended warranties—adding 12 months to your coverage for $150–$500. This is worth considering in regions with aggressive algae growth (like the Pacific Northwest or humid Southeast).
What Happens During a Warranty Claim
If you need to invoke your guarantee, expect this timeline:
- Day 1: Contact the contractor with photos of the issue
- Days 2–7: Inspector visits to assess (some charge $50–$100 if damage is non-covered)
- Days 8–30: Work is rescheduled if valid; the contractor re-cleans or repairs at no charge
- Beyond 30 days: Disputes go to small claims court or arbitration (check your contract)
The responsiveness here varies wildly. Large companies often have 10-day service windows; smaller contractors might take 2–3 weeks.
Making Your Decision
Compare warranties alongside price, not just total cost. A $300 job with a legitimate 12-month guarantee is often better value than a $250 job with zero coverage. Platforms like Mercoly let you compare soft washing providers and their guarantees side-by-side, so you can see actual terms before contacting anyone.
Frequently Asked Questions
Q: If my roof gets moldy again six months after soft washing, do I have to pay for cleaning again? If your contractor offered a 12-month satisfaction guarantee, you typically pay nothing—they return to clean at no charge. However, check if the contract excludes your situation (like extreme humidity or heavy shade from trees).
Q: Does the soft washing guarantee cover damage from rain that falls right after cleaning? Most legitimate warranties exclude rain within 24–48 hours of service, since the cleaning solution needs time to dry. Damage from normal rain after that window is usually covered under workmanship guarantees.
Q: Can I transfer my warranty to a new owner if I sell my house? Some contractors allow transferable warranties (add 1–2 years of value to your home sale), while others don't. Always ask and request this in writing if transferability matters to you.
Start your contractor search with a clear understanding of what you're guaranteed—it's worth the extra 10 minutes of questions upfront.