Render Cleaning in Swindon
House rendering, K Rend & external wall insulation specialists. Free surveys, fixed written quotes, tidy workmanship.
Swindon Rendering cleans rendered exteriors across Swindon — the green algae on north-facing walls, red algae streaks, and general urban grime that builds on even the best self-cleaning silicone finishes after a few years.
The method matters: pressure washing damages render, driving water into the coat and eroding the texture. Render is cleaned by softwashing — low-pressure application of a biocide wash that kills the organic growth, followed by a gentle rinse.
What we clean off render
Green algae
The most common complaint — thrives on shaded, north-facing and hedge-side elevations. Softwashing removes it and inhibits regrowth.
Red algae
The stubborn orange-red staining that affects some render in damp positions — needs the correct biocide treatment, not scrubbing.
Black spot & lichen
Slower-growing but deeper-rooted — treated and lifted over a follow-up cycle rather than blasted off.
Run-off staining
Streaks under sills, copings and fixings — cleaned, and the cause (failed sealant, missing drips) pointed out so it doesn't return.
Render cleaning cost in Swindon
Softwashing a rendered 3-bed semi in Swindon typically costs £450–£900 depending on access, growth level and whether full scaffold-free reach is possible. It's the cheapest way to make a rendered house look years newer — and on K Rend and silicone systems a periodic clean is all the maintenance the render should ever need.
If cleaning reveals cracks or blown patches underneath the growth, we'll photograph them and quote repairs separately — algae often colonises damp render, so growth in one patch can be a symptom worth checking.
Render repair
Cracks and damage found during cleaning, fixed properly.
Frequently asked questions
Ready for a free, no-obligation quote?
Call 01793 569534