WHITEHOUSEOutdoor Services
A rendered house wall being softwashed clean across Northern Ireland

Rated 4.8 stars by customers on Google

Render cleaning that brings your walls back to life.

Softwash and DOFF steam cleaning for K-Rend, pebble dash and painted render across Northern Ireland. We lift years of green algae and black staining without a drop of high pressure. Established 2003.

  • Low pressure, no damage
  • K-Rend and silicone safe
  • Fully insured
Established 2003Safewash CertifiedSoftwash Systems TrainedBenz ApprovedDOFF Operator CertifiedCity & Guilds QualifiedCOSHH Certified2 Million Pounds Public Liability
Render cleaning before and after on a Northern Irish home

The difference

Years of green and black, gone in a day

Most render is not stained, it is covered in living algae and lichen. Our softwash kills it at the root and rinses it away, bringing the original finish back without touching the surface underneath.

How it works

A simple, no-mess process

One visit, one clear price, and walls that stay clean for years instead of weeks.

  1. 01

    Free survey and quote

    We look at the finish, the growth and the access, then give you a clear fixed price. No pressure, no call-out fee.

  2. 02

    Softwash treatment

    A biocidal solution is applied at low pressure. It gets into the render and kills the algae, moss and lichen at the root.

  3. 03

    The dwell and rinse

    The treatment is left to work, then gently rinsed. On heavy growth we return for a second visit as the biocide keeps clearing.

  4. 04

    Clean walls that stay clean

    Because we treat the cause and not just the surface, the finish stays clear for years rather than weeks.

Rated 4.8 stars by customers on Google

What Northern Ireland homeowners say

Absolutely fantastic service. Graham and his team transformed our house render which was covered in green algae. It looks like a brand new house now. Professional, punctual and great value.
Sarah M. , Newtownabbey
My stone walls were looking really shabby after years of weathering. Graham knew immediately what was needed and the finish was spotless.
Jennifer R. , Antrim
20+ years of experience really shows. Professional team, competitive pricing and the render came up like new.
Robert T. , Newtownabbey

Where we work

Covering all six counties of Northern Ireland

Based in Mallusk, we travel right across Northern Ireland for render and softwash cleaning.

Common questions

Render cleaning, answered

No. Softwashing works at low pressure, closer to a garden hose than a pressure washer. The cleaning is done by a biocidal solution, not by force, so it lifts algae and staining without eroding the finish or forcing water into the render.

Because we kill the growth at the root rather than just blasting the surface, a softwash typically stays clean for three to five years. Pressure washing only clears the top layer, so it often comes back within six to twelve months.

It depends on the size of the property, the level of growth and the access, but a typical three bed semi starts from around 200 to 400 pounds. We give you a clear fixed price after a free survey, with no call-out fee.

Most homes are treated in a single day. Heavier growth sometimes needs a return visit, because the biocide keeps working and clearing for days after we apply it.

No. We arrive fully self-contained with our own water and power, so there is nothing you need to provide on the day.

It kills what is there now at the root. Render will always be exposed to the Northern Irish weather, so growth returns eventually, but far more slowly than after a pressure wash. Many customers have us back every few years to keep it fresh.

Yes, and those are the walls that need it most. North-facing gables get the least sun and stay damp longest, so they green up fastest. The softwash treats them the same way, just with the right dwell time for heavier growth.

Yes. Older dash and harling finishes clean up really well with a softwash. Because there is no high pressure involved, we clear the growth from the texture without knocking stones or chips loose.

For most Northern Irish homes, every three to five years keeps it looking right. If a wall is heavily shaded or near trees it may green up sooner, and we can advise once we have seen it.

Yes. We are Safewash certified, City and Guilds qualified, COSHH certified and carry two million pounds of public liability insurance. We have been cleaning exteriors across Northern Ireland since 2003.

Ready to see your render clean again?

Send a couple of photos and your postcode for a fast, no obligation quote. We cover every county in Northern Ireland.