Roof Cleaning Bristol — Soft Wash Moss Removal & Roof Treatment
Bristol Blast provides professional roof cleaning across Bristol and Bath using safe, low-pressure soft wash techniques. Our specialist roof treatment removes moss, lichen, and algae without damaging your tiles — extending the life of your roof and dramatically improving your property’s kerb appeal. Over 20 years of combined experience in exterior cleaning.
Why Soft Wash — Not Pressure Washing — for Your Roof
High-pressure jet washing is fantastic for driveways and patios, but it can seriously damage roof tiles. The force dislodges granules from felt tiles, cracks concrete tiles, and can lift slate. That’s why Bristol Blast uses a professional soft wash system for all roof cleaning — a low-pressure method that relies on specially formulated biocide solutions rather than brute force.
Our soft wash treatment kills moss, lichen, and algae at the root. The biological growth dies off naturally over the following weeks and is washed away by rain, leaving your roof clean and protected. This method is safer for your tiles, safer for the operatives, and delivers longer-lasting results than pressure washing. Most Bristol roofs stay clean for 3–5 years after a soft wash treatment.
Our Roof Cleaning Process
1. Roof Survey
We inspect your roof from the ground and (where safe) from ladder access to assess the extent of moss and algae growth, tile condition, and any repairs needed before cleaning begins.
2. Moss Scraping
For heavily affected Bristol roofs, we manually scrape thick moss growth from tiles and ridge lines. This removes the bulk of the growth before the soft wash treatment, ensuring the biocide can penetrate effectively.
3. Soft Wash Treatment
We apply our professional-grade biocide solution at low pressure across the entire roof surface. This kills remaining moss, lichen, and algae at the root level. The treatment continues working for weeks after application, with dead growth washing away naturally in the rain.
4. Gutter Clear & Clean-Up
We clear all scraped moss from gutters, downpipes, and surrounding areas. Your property is left clean and tidy. We recommend combining roof cleaning with our gutter cleaning service for complete roofline maintenance.
Roof Cleaning FAQs
Is soft wash roof cleaning safe for all tile types?
Yes. Our soft wash system is safe for concrete tiles, clay tiles, slate, felt shingles, and metal roofing. The low-pressure application means there’s no risk of tile damage, cracking, or dislodging — unlike high-pressure jet washing.
How long does a roof soft wash last?
Most Bristol roofs stay clean for 3–5 years after our soft wash treatment. The biocide continues to inhibit regrowth long after the initial application. North-facing roofs in shaded areas may need retreating sooner.
Does moss damage roof tiles?
Yes. Moss holds moisture against the tile surface, accelerating frost damage in winter. It also lifts tiles as it grows, creating gaps where water can enter. Left untreated, moss can significantly shorten the lifespan of your Bristol roof and lead to costly repairs.
Do you also clean the walls and render?
Yes. Many Bristol customers combine roof cleaning with our render and brick cleaning service for a complete exterior transformation. We use the same soft wash approach on rendered walls to remove algae and staining safely.
Our Other Services
Driveway Cleaning
Block paving, tarmac, concrete, and natural stone driveways jet washed back to their original condition with full pre-treatment.
Patio & Decking
Expert jet washing for sandstone, porcelain, Indian stone patios, and timber or composite decking across Bristol.
Render & Brick
Specialist soft wash cleaning for rendered, pebble-dashed, brick, and stone walls throughout Bristol.
Gutter Cleaning
Professional gutter clearance, downpipe flushing, and fascia cleaning to protect your Bristol property from water damage.
Ready for a Cleaner Roof?
Get a free, no-obligation quote for professional soft wash roof cleaning in Bristol. Our specialist treatment removes moss, lichen, and algae safely — contact Bristol Blast today.