Will pressure washing damage my render?

Yes, in most cases. Pressure washing can crack render, blow sections off K-rend and monocouche, and strip texture from sand-and-cement. We only soft wash render, using biocide and low pressure instead.

What's the difference between soft washing and pressure washing?

Soft washing uses a biocide treatment to kill algae, lichen and fungal growth, then rinses it away at low pressure. Pressure washing relies on force alone, which is fine on hard surfaces like paving but risky on render and old brick pointing.

What causes the green staining on my walls?

That's usually algae, which establishes on damp, shaded render and brick. It's cosmetic rather than structural, but it does spread if left, which is why we treat the growth with biocide rather than just rinsing the surface.

What's involved in cleaning lichen off render?

Lichen is one of the more stubborn growths — it often needs a longer biocide dwell time than algae to break down properly. We treat it accordingly rather than rushing the rinse.

What render types can you clean?

K-rend, monocouche, pebbledash and traditional sand-and-cement render — each gets treated slightly differently depending on thickness and texture, but all are soft washed rather than pressure washed.

Is soft washing safe for older brick and lime mortar?

Yes — low pressure and steam are both gentler on lime mortar than a pressure washer would be, which matters on older brickwork where the pointing is softer than modern cement-based mortar.

Algae, Lichen & Black Streak Removal — Shiney Row

Render gone green or brick streaked black in Shiney Row? We soft wash K-rend, monocouche and pebbledash safely with biocide, never high pressure. Call Trevor for a quote.

City of Sunderland · DH4 · 2.6 miles south of our Washington base

We use soft washing and steam methods instead. A biocide treatment kills the growth at the root, a low-pressure rinse lifts dirt without forcing water behind the render, and the result actually lasts because the problem is gone, not just blasted off the surface for a few months.

Housing across City of Sunderland covers everything from 1930s pebbledash semis to newer K-rend and monocouche estates, and render cleaning has to be matched to what's actually on the wall — a method that's fine on sand-and-cement render can strip a thin acrylic monocouche coat if it's done with a pressure washer instead of a soft wash.

A soft wash treatment breaks that cycle rather than just resetting it. Biocide gets down into the render texture and brick pores, so regrowth is slower and the wall stays cleaner for longer than a one-off rinse would manage.

Trained in the method that actually matters

Biocide trained (2024)
The core skill behind a proper soft wash — knowing what to apply and for how long.
Never pressure washing render
Soft wash and steam only on render and brick, every time.
Fully insured
Covered for peace of mind on every job we do.

Homeowners

Protecting the value of your home

Left untreated, algae and lichen on render don't just look bad — trapped moisture behind established growth can eventually affect the render coat itself, and black streaking on brick can mask early signs of pointing that needs attention. Regular soft washing keeps growth from reaching that point, which is cheaper than dealing with render or repointing repairs later.

Soft washing vs pressure washing: why it matters

Pressure washing forces water directly at the render surface, and on K-rend, monocouche and pebbledash that can crack the coating, blow sections off the wall entirely, or strip the texture back to bare aggregate.

Soft washing does the opposite. Biocide does the actual cleaning work, and the rinse afterwards is at low pressure — just enough to carry the dead algae and lichen away without stressing the render or the brick pointing underneath. The result looks the same on the day either way, but only one of those methods leaves the coating intact a year later.

How we handle established or difficult growth

1
Identify the growth type
Red algae, green algae, black streaking and lichen all respond slightly differently to biocide treatment.
2
Test area
On heavily established growth we'll often treat a small area first to confirm how the render responds.
3
Extended dwell time
Stubborn lichen crusting gets longer biocide contact time rather than a stronger rinse.
4
Targeted steam
Any remaining black staining on brick after biocide treatment gets a steam pass to finish it off.
5
Rinse and review
A final low-pressure rinse and a walk-round to check nothing's been missed before we leave.

Our coverage area

We work across roughly 45 miles from our Washington base, which takes in Shiney Row and the towns and villages around it comfortably. Render and brick cleaning doesn't need to be a local specialist-only job, and we bring the same soft wash standard wherever we go.

Render & Brick Cleaning (Soft Wash) near Shiney Row

Typical render and brick cleaning prices

Prices depend on render type, how established the growth is, property size and access, so these are typical ranges rather than fixed prices — we'll always confirm a firm figure after seeing photos or visiting.

Single elevation (render or brick)	from around £150–£220
Semi-detached property, all elevations	typically £280–£380
Detached property, all elevations	typically £400–£650
Bungalow, all elevations	typically £220–£320

Render & Brick Cleaning (Soft Wash) in Shiney Row — common questions

Algae, lichen and black streaking don't need a pressure washer to shift — they need the right biocide treatment and a bit of patience. That's what we bring to every render and brick job in Shiney Row.

Based in Washington and covering the area around Shiney Row, we bring a soft wash and steam approach to render and brick cleaning built around not damaging the surface we're cleaning. Call Trevor on 07501 060609 to book.

From Victorian brick terraces to modern K-rend estates, we adjust our soft wash approach to what's actually on the wall. Fully insured, biocide trained (2024), and covering Shiney Row and the surrounding area.

Not sure if your render needs cleaning?

Call 07501 060609 and we'll usually be able to give you a rough price over the phone, based on property type and size.

Book now Call 07501060609

Render & Brick Cleaning (Soft Wash) in Shiney Row — the elevation part-way through treatment, a few minutes from Penshaw

Render & Brick Cleaning (Soft Wash) in Shiney Row — the finished render drying in the sun, 5.1 miles from the sea at Ryhope

Algae, Lichen & Black Streak Removal — Shiney Row

Trained in the method that actually matters

Biocide trained (2024)

Never pressure washing render

Fully insured