Before
AfterBrick colonial with dormers and a cupola
Green moss and algae streaks covered the front slopes. Same angle before and after.
Locust Valley, NY
Slate roof cleaning in Locust Valley
Shade and old trees make Locust Valley roofs a magnet for moss and algae. This brick colonial had green streaks across every slope.
We soft-wash slate from ladders and never walk on it. No pressure washing, no scraping. Most roofs look 80 to 90% better the day we finish.
BeforeAfter
Locust Valley, 2024. Drag to compare.
Our work in and near Locust Valley
BeforeAfter
Before
AfterLeft wing, same house
Moss and algae cleared from the lower slopes and dormers.
Before
AfterEntry and cupola
Cleaned around the cupola and entry roof without walking the slate.
How we clean slate
We explain the process
Before any work starts, you know exactly what we'll do and what to expect.
We protect the property
Plants, gutters and copper get noted and protected. Landscaping is rinsed the whole time.
We soft wash from ladders
Low-pressure treatment applied from ladders. No one steps on the slate.
Weather finishes the job
The slate is not rinsed. Rain clears the dead growth over the next 6 to 8 weeks.
Nearby: Mill Neck · Brookville · Old Westbury
Free quote
Find out what your roof needs
Call, text or send the form. Tell us the town and what you're seeing on the roof.
Call or text 631-433-2703
- We never walk on slate
- No pressure washing
- 2-year guarantee on full roof cleanings
- Licensed and insured, 13+ years in business
- Owner on every job