ServicesRender Cleaning
Render Cleaning in Milton KeynesGreen and black staining liftedwithout eroding the render
A low-pressure softwash that cleans the coating rather than sandblasting it, priced per panel and backed by a 2-year guarantee.
14 years cleaning exteriors · 2-year render guarantee · Fully insured
14 years
Cleaning exteriors since 2012
3–5 years
No-moss guarantee on roof cleaning
£5m / £10m
Public & employer's liability cover
5 staff · 3 vans
Owner-run, directly employed team
Overview
What render cleaning actually involves
Rendered walls hold algae and organic staining that pressure washing can drive into the surface. We softwash instead, so the render is cleaned rather than eroded, and the result holds.
What it is
Render cleaning is the removal of algae, lichen and black organic staining from rendered and painted elevations using a softwash solution applied at low pressure, followed where needed by a gentle steam washdown.
Who it is for
Owners of silicone, monocouche, K Rend, pebbledash and painted render, plus commercial clients with large rendered elevations and managing agents responsible for blocks.
When it is needed
When walls have gone green on the shaded side, when black streaking runs beneath sills and gutter joints, before a property goes on the market, or when the render looks like it needs repainting but is structurally sound.
Why professional help matters
Most render damage we are called to fix was caused by a pressure washer. Render is a thin decorative coating over a substrate: hit it hard enough to remove staining and you remove the coating with it, leaving a patchy finish that only full re-rendering will resolve.
What's included
- Softwash as the primary method
- Gentle steam washdown for heavy organic staining
- Priced per panel, size-dependent
- Residential and commercial properties
Guarantee
2-year guarantee, with optional retreatment available.
Pricing
Render Cleaning starts from £295 + VAT. Final pricing depends on the size, access and condition of the property, and is confirmed in a written quote valid for 30 days. Payment is by bank transfer against an invoice, or cash; we do not currently take card payments.
Request your estimate
Full address plus photos taken standing back from the property lets us quote remotely.
What it costs to wait
What happens if it is left
Organic growth holds moisture in the coating
Algae and lichen keep the render face permanently damp. Trapped moisture works into micro-cracks, freezes, expands and progressively breaks the coating away from the substrate.
Staining becomes permanent
Left long enough, black organic staining bites into the surface texture rather than sitting on it. It is still cleanable, but it takes multiple treatments instead of one.
Overflow makes it worse
Most black streaking starts at a leaking gutter joint or a blocked outlet. Clean the wall and ignore the cause and the stain simply returns down the same line.
Unnecessary redecoration
Owners routinely pay to repaint or re-render walls that only needed cleaning, a job many times the cost of a softwash, for a coating that will stain again if the growth is not treated.
Common mistakes we get called in to fix
- Pressure washing render, which erodes the coating and blows water behind it
- Using household bleach, which lightens the stain briefly and damages planting below
- Cleaning the wall without fixing the leaking gutter joint that caused the streak
- Painting over organic growth instead of killing it first
- Treating one elevation and leaving the shaded side, so the contrast is worse than before
Our process
How the job runs, start to finish
Step 1
Inspection
We identify the render type, silicone, monocouche, K Rend, pebbledash or paint, check for existing cracks and blown sections, and trace the source of any streaking back to its cause.
Step 2
Diagnosis
Panel count, staining severity and substrate condition decide the treatment strength and whether a steam washdown is needed. Anything we would not clean without a repair first is flagged before we quote.
Step 3
Execution
Planting, paving and glazing are protected. The softwash is applied at low pressure across full panels so there are no tide marks, dwelled, then washed down gently where the staining warrants it.
Step 4
Verification
Before the vans move, the work is walked with you or photographed end to end. Gutters are flow-checked, surfaces are inspected in daylight, and anything we found along the way, a slipped tile, a split downpipe, a failing joint, is reported in writing rather than left for you to discover.
Step 5
Completion and guarantee
The site is cleared, planting is rinsed off and your invoice follows by email. Where the service carries a guarantee, the terms are confirmed in writing with the date the cover runs from, and low-cost retreatment is offered before the cover lapses rather than after.
Benefits
What you get for the money
Speed
Most domestic elevations are completed in a single visit, with no scaffolding required up to three storeys.
Safety
Low-pressure application means no blown render, no water driven behind the coating, and no damage to seals or trickle vents.
Longevity
A 2-year guarantee, with optional retreatment to hold the finish for longer.
Cost savings
Cleaning a rendered elevation costs a fraction of repainting it, and a small fraction of re-rendering it.
Reliability
Priced per panel and confirmed in writing, so the number you are quoted is the number you pay.
Peace of mind
£5m public liability cover and our own directly employed team.
In detail
Render Cleaning: methods, materials and variations
Render types and materials
Silicone and acrylic thin-coat systems clean readily and hold their colour well. Monocouche through-coloured render is more porous and needs a lower-strength solution with a longer dwell. K Rend and similar textured systems trap growth in the aggregate and often need two passes. Pebbledash holds the most debris of all and takes the longest. Painted masonry is treated cautiously: the paint's age and adhesion set the ceiling on what can safely be done.
Softwash method in detail
The solution is applied at roughly garden-hose pressure through a broad fan, saturating the panel from the bottom up to prevent run marks. It is left to dwell so the biocide breaks down the cell structure of the algae and lichen rather than just bleaching the surface. Heavier organic staining then gets a controlled steam washdown, heat and volume rather than pressure, to carry the dead growth away.
Variations of the service
Full-property cleans, single-elevation cleans for the shaded side only, spot treatment of streak lines under sills and gutters, and scheduled retreatment for coastal or heavily wooded settings. Render cleaning is frequently booked together with roof cleaning, since roof runoff is a common source of wall staining.
Situations this applies to
North-facing walls, properties overshadowed by mature trees, houses near open fields or water, new-build estates where identical rendered elevations make one dirty house obvious, and any sale or valuation where kerb appeal matters.
Residential and commercial differences
Domestic jobs are usually a half-day to a day per property. Commercial elevations are quoted per panel across the whole building, with RAMS and method statements provided, access equipment planned, and works scheduled outside trading hours where footfall demands it.
Our method on your property
A low-pressure softwash treatment breaks down the organic growth, followed where needed by a controlled steam washdown.
Before and after
Render Cleaning results you can drag through
The same property before we started and after we finished. Drag the handle across the photo to compare.
BeforeAfterRecent work
Render Cleaning jobs we have completed
Real photographs from our own jobs across Milton Keynes and the surrounding counties.
Proof
Work people keep coming back for
Ian and his team turned a driveway untouched for over a decade into a like-new surface.
We have worked with Ian's team for seven years across numerous projects.
Steam cleaning transformed the roof over a two-day job, with the crew checking throughout for leaks.
They worked around tricky rear-garden access on our Victorian mid-terrace without any fuss.
Questions
Render Cleaning FAQs
How much does render cleaning cost?
Render cleaning starts from £295 + VAT and is priced per panel, so the figure scales with the size and number of elevations. Your written quote is itemised and valid for 30 days.
How long does render cleaning take?
A typical detached house is a one-day job. Single elevations are often half a day. Large commercial buildings are scheduled around access equipment and quoted with a duration up front.
Will it damage my render?
No. We softwash at low pressure specifically so the coating is cleaned rather than eroded. Pressure washing is what damages render, which is why we do not use it here.
How long does the guarantee last?
Render cleaning carries a 2-year guarantee against the return of organic growth, with optional low-cost retreatment available afterwards.
How long will the walls stay clean?
Two years under guarantee is the benchmark, and often longer on well-drained, sunlit elevations. Shaded or tree-covered walls benefit from a retreatment visit at the two-year mark.
Can you clean painted walls and pebbledash?
Yes. Painted masonry is treated at reduced strength depending on the age and adhesion of the paint, and pebbledash is cleaned with a longer dwell because the aggregate holds more growth.
Do you clean commercial buildings?
Yes. We hold IPAF and PASMA working-at-height qualifications, provide RAMS and method statements on request, and carry £5m public liability and £10m employer's liability cover.
Will it harm my plants?
Planting, borders and paving are sheeted before we start and rinsed down afterwards. This is part of the standard method, not an extra.
Do you need scaffolding?
Not up to three storeys. Above that we bring in MEWPs, cherry pickers or tower scaffolding, priced into the quote.
Which areas do you cover?
Milton Keynes, Buckinghamshire, Bedfordshire, Northamptonshire and the surrounding counties, from our base in Stony Stratford.
Related services
Render Cleaning near you
More on Geyserclean, the full service list, our coverage areas or get in touch.
Clean the render instead of repainting it
Send a few photos of the affected elevations and you will get a per-panel price in writing, guaranteed for two years.
14 years · 3–5 years · £5m / £10m · 5 staff · 3 vans · Mon to Fri, 8am to 6pm.