Re-rendering, repairs and upkeep

Render cleaning and treatment

Render cleaning removes algae, mould and dirt from rendered walls using a low-pressure soft wash and a biocide that keeps working after application. It avoids high-pressure jetting, which can damage thin-coat render and drive water into the wall.

Low-pressure application — no high-pressure jetting
Biocide treatment that continues to work after cleaning
Safe for silicone, acrylic, monocouche and EWI finishes
Plants, windows and surfaces protected
Optional silicone paint to refresh faded colour
Most houses done in a day

Get a guide price See prices

A worker soft-washing green algae from a white rendered wall, with one section already cleaned

Free survey for render cleaning

Tell us about the property. We reply on working days.

Postcode *

Enter a valid UK postcode.

Service *

Choose a service.

Name *

Enter your name.

Phone *

Enter a phone number we can call.

Email (optional)

Check the email address.

About the job (optional)

We use your details only to respond to this enquiry. See our privacy notice.

Why not pressure wash render?

Thin-coat renders are only 1–2mm thick. High-pressure jetting can erode the texture, strip colour, force water behind beads and cracks, and damage the insulation system underneath. A soft wash uses chemistry rather than pressure to do the work.

Typical build-up

Method: Low-pressure soft wash
Treatment: Biocide with residual action
Suitable for: Silicone, acrylic, monocouche, EWI, painted render
Optional: Silicone paint refresh
Typical duration: 1 day for a house

How long does cleaned render stay clean?

It depends on shade, trees and exposure. Many walls stay clean for several years after a biocide treatment. North-facing, shaded and damp walls may need treating more often.

Render cleaning and treatment prices

Render cleaning and treatment guide prices
Item	Guide price	Notes
Soft wash and biocide	£10–£19 per m²inc VAT	Minimum £475
Clean and silicone paint refresh	£22–£36 per m²inc VAT	Excluding scaffold
Typical semi, all elevations	£835–£1,555inc VAT	Clean only

Guide prices are confirmed by a fixed written quote after a free survey. Prices include VAT at 20%.

How it works

Tell us about the property
Use the quote tool or form, or call free on 0800 088 6248.
Free survey
We measure the walls, check condition and confirm planning and building control.
Fixed written quote
The system, details, access, exclusions and VAT, in writing. Anything hidden is priced and agreed before extra work.
Installation and handover
Work planned around the weather, then inspected and documented.