Wales
Render Cleaning in Gwynedd
Soft-wash render cleaning and biocide treatment that removes algae without damaging the finish.
We carry out render cleaning across Gwynedd and the surrounding Gwynedd area throughout the year.
The prevailing picture in Gwynedd is slate and stone cottages, quarry housing and exposed coastal properties. That means extreme driving rain on slate and stone construction comes up more here than almost anywhere else. The area sees among the highest rainfall in the UK with severe exposure, which is the single biggest factor in how long any render lasts here.
Local factor. Snowdonia records some of the highest rainfall in britain, and any non-breathable render on stone here will trap water within a single winter.
Is render cleaning right for a Gwynedd property?
Choose soft-wash cleaning to restore a discoloured render without the substrate damage that pressure washing causes on thin-coat systems.
That decision gets made at the survey, not on the phone. We will tell you plainly if a different system would serve the building better — including when a cheaper one would.
Guide price and specification
| Guide price | £12–£26 per m² |
|---|---|
| Applied thickness | Surface treatment |
| Curing / drying | Same day |
| Guarantee | 12 month treatment |
| Coverage | All of Gwynedd — 10 towns and cities |
Indicative only, excluding scaffold, stripping and repairs. Try the guide-price tool for a range based on your property.
What is included
- Low-pressure soft wash
- Biocide treatment kills spores
- Safe on silicone and acrylic
- No high-pressure damage
- Removes algae, lichen and moss
- Treats staining and streaking
- Gutter and downpipe check
- Restores original colour
Render Cleaning across Gwynedd
Render Cleaning in Gwynedd
Tell us about the property and we will call you back to arrange a survey.
Other services in Gwynedd
What happens next
Four steps from enquiry to finished wall
Free survey
We visit, test the substrate, measure up and identify what caused any existing failure.
Written quote
An itemised fixed price with the system named, materials specified and scaffold included.
Booked in
An agreed start date, scaffold arranged, and a clear run of days set aside for your job.
Finished and guaranteed
Site cleared, scaffold struck, guarantee documents and system warranty issued.
FAQs
Render Cleaning in Gwynedd — questions
How long does render cleaning last?
Typically two to four years before noticeable regrowth, depending on shading, aspect and nearby vegetation. Annual maintenance treatments extend that considerably.
Why is only one wall green?
North-facing and shaded elevations stay damp far longer, so algae establishes there first. Overhanging trees and leaking gutters accelerate it.
How long does a rendering job take?
A typical three-bedroom semi is usually one to two weeks on site including scaffold, preparation, application and finishing. Weather, wall condition and the system chosen all move that.
Do I need planning permission to render my house?
Usually not on a standard house, but you will if the property is listed, in a conservation area, or if rendering would significantly change its appearance. We flag it at survey.
Will you need scaffolding?
For anything above single storey, yes — it is safer and produces a better finish than working off ladders or towers. Scaffold is included and itemised in the quote.
How long before I can paint new render?
Through-coloured systems need no painting at all. Sand and cement should cure for around 28 days before masonry paint goes anywhere near it.
Render Cleaning quotes across Gwynedd
Free survey, honest advice on whether this is the right system, and a fixed written price.