K-Rend & SilkRend
Through-coloured silicone renders favoured by modern builders. Hugely susceptible to algae bloom. Pressure-washing is explicitly warranty-voiding — SoftWash is the only sanctioned method.
Harlow · Essex · HertfordshireRender & Exterior Wall Cleaning
Render & Exterior Wall Cleaning
Walls Restored Without Repainting.
Harlow, Essex & Hertfordshire.
Modern silicone and acrylic renders attract algae like a magnet. Our SoftWash biocidal process kills the contamination at the spore and restores the original render colour — at a fraction of repainting cost, with long-lasting results.
Free, no-obligation quote. No pushy sales. Family-run, Harlow-based.
K-Rend & SilkRend approved methods
SoftWash biocidal — no pressure damage
Fully insured
Half-day job for most homes
4+ years render specialism
Service Overview
Understanding render & exterior wall cleaning
What it is
Low-pressure SoftWash biocidal cleaning of K-Rend, Weber, Parex and other through-coloured silicone renders, painted render, pebbledash, monocouche, and traditional painted brickwork.
Who it's for
Any homeowner with green or black streaking down their render (especially under windows, eaves and gable ends); anyone considering repainting before realising cleaning costs a fifth.
When you need it
Spring through autumn for fastest biocide action. Year-round in dry conditions. Best paired with gutter clear and fascia clean for whole-house restoration.
Why professional help matters
Pressure-washing modern silicone renders can drive water through the substrate and damage the colour layer. SoftWash uses near-zero pressure and biocidal chemistry to clean from within — the manufacturer-approved approach.
If left untreated
The cost of doing nothing.
- Algae on render holds moisture against the substrate, accelerating cracking and degradation.
- Black streaks under windows become permanent staining within 3 years untreated.
- Repainting dirty render fails within a season — every job becomes two.
- Pressure-washed render often shows pressure-track marks that are visible for years.
- A streaked, neglected render shouts 'neglected property' from the kerb.
Common mistakes
What we see go wrong.
- Repainting instead of cleaning — 5× the cost, same end result.
- Pressure-washing K-Rend — voids the manufacturer warranty.
- Using bleach without a biocide — kills the surface but not the spore, regrows in months.
- Trusting a window cleaner with a SoftWash kit but no chemistry training.
Our Process
A predictable system, from first call to clean-up
- 01
Inspection
Render type identified, contamination assessed, surrounding planting protected.
- 02
Pre-Wet
Foliage and adjacent surfaces wet-rinsed for protection.
- 03
SoftWash Application
Sodium hypochlorite-based biocide applied at zero pressure via reach systems.
- 04
Dwell & Rinse
20-minute dwell, then gentle rinse — contamination falls cleanly off.
- 05
Post-Treat & Inspection
Final biocidal mist for residual spore-kill, then a walk-round with you.
The Benefits
What you actually get for the money.
Restores original render colour
Customers consistently mistake cleaned render for newly applied.
Cheaper than repainting
80%+ saving vs full repaint.
Manufacturer-approved on K-Rend & SilkRend
Won't void render warranties.
Long-lasting results
Biocide continues working on airborne spores.
Damage-free SoftWash
Zero-pressure system can't drive water through the substrate.
Bundles with gutter & fascia
Whole-house refresh at meaningful saving.
Deep Detail
The technical bit — for the people who like to know
Monocouche & traditional render
Cement-based traditional render handled with the same SoftWash chemistry. Painted render cleaned without disturbing the paint film.
Pebbledash
Surface texture traps algae deeply. Two-pass SoftWash typically needed; we quote accordingly.
Painted brick
Cleaned with milder biocide to avoid lifting weak paint films. Always test-patched first.
Why SoftWash works
Sodium hypochlorite kills the cell membrane of algae, lichen and bacterial biofilms. Combined with a surfactant it penetrates the texture and clears the contamination without physical impact. Rinse removes dead matter, biocidal residue protects against new spore landing for 18–24 months.
Residential vs commercial
Domestic gables, returns and full elevations our core. Commercial render — schools, offices, retail — done on quotation with method statements and out-of-hours scheduling.
FAQ
Straight answers to common questions
Bring your render back — without a paintbrush.
SoftWash specialists. Half-day job. Free, no-obligation quote.
Fully insured · Companies House #15556482 · Family-run · 4+ years
We cover
Based in Harlow CM18, working across Essex and Hertfordshire.