Render & Brick Cleaning Bristol — Soft Wash & Pressure Washing
Bristol Blast provides specialist render and brick cleaning across Bristol and Bath. We use safe soft wash techniques to remove algae, red and green staining, pollution marks, and biological growth from rendered walls, brickwork, and stone facades. Our professional approach protects your wall finish whilst delivering dramatic results.
Why Soft Wash for Render and Walls?
Rendered walls — especially K-rend, monocouche, silicone render, and painted render — cannot be cleaned with high-pressure jet washing. The force damages the surface texture, strips paint, and can even crack the render itself. That’s why Bristol Blast uses a professional soft wash system for all render and wall cleaning.
Bristol’s damp climate causes algae, lichen, and red or green staining to build up on exterior walls, particularly on north-facing and sheltered elevations. Our soft wash treatment uses a biodegradable biocide applied at low pressure to kill biological growth at the root. The staining fades over the following weeks as rain washes away the dead material — leaving your Bristol property’s walls looking fresh and clean.
Wall Surfaces We Clean
K-Rend & Silicone Render
K-rend and silicone render are common on newer Bristol properties. These textured finishes trap moisture and organic matter, leading to green and red algae staining. Our soft wash cleaning removes the staining without damaging the render’s grain or colour.
Painted & Smooth Render
Painted render requires an especially gentle approach. High-pressure jet washing would strip the paint and damage the finish. Our low-pressure soft wash cleans the surface effectively whilst preserving the paintwork — extending the time before you need to repaint.
Brick, Stone & Pebbledash
Exposed brickwork and natural stone facades can be pressure washed at higher pressures, but we still prefer a soft wash approach for biological growth removal. For pollution staining and carbon deposits on Bristol’s older brick buildings, we use specialist cleaning agents combined with controlled jet washing.
Render Cleaning FAQs
What causes the red and green stains on my render?
Red staining is typically caused by a type of algae called Trentepohlia, while green staining comes from standard algae growth. Both thrive in Bristol’s humid climate, particularly on north-facing walls and areas sheltered from direct sunlight. Our soft wash treatment kills both types effectively.
Will soft wash damage my K-rend?
No. Our soft wash system operates at a fraction of the pressure of a standard jet washer. The cleaning is done by the biocide solution, not water pressure. It’s specifically designed for delicate surfaces like K-rend, silicone render, and painted finishes.
How long does it take to see results?
You’ll see an immediate improvement on the day, but the full results develop over 4–8 weeks as the biocide continues working and rain washes away the dead biological material. The gradual process is gentler on your render than aggressive jet washing.
Can you clean the render and roof at the same time?
Absolutely — and we recommend it. Many Bristol properties have algae on both the roof and walls. Combining roof cleaning with render cleaning means we treat the entire exterior in one visit, saving you time and money.
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.
Roof Cleaning
Safe soft wash moss and algae removal that protects your tiles and keeps your roof cleaner for longer.
Gutter Cleaning
Professional gutter clearance, downpipe flushing, and fascia cleaning to protect your Bristol property from water damage.
Ready to Restore Your Walls?
Get a free, no-obligation quote for professional render and brick cleaning in Bristol. Our specialist soft wash treatment removes algae, staining, and biological growth safely — contact Bristol Blast today.