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Silicone Rendering Quotes

Modern silicone-based external render — hydrophobic, self-cleaning, breathable, available in hundreds of colours. The premium low-maintenance external render system. Compare up to 3 free quotes from vetted local tradespeople within 24 hours.

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  • All project sizes covered
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About Silicone Rendering

Silicone rendering is widely regarded as the premium external render system available today. The silicone (siloxane) polymer added to the render compound makes the finished surface hydrophobic — water beads off rather than soaking in — while remaining fully vapour permeable (breathable). This unique combination means silicone render actively repels rainwater and algae, while allowing the wall to breathe.

Silicone render is available in hundreds of premixed colours — no painting required, ever. The colour runs through the material, meaning minor chips or scratches are almost invisible. Leading systems include Weber Silicone, Parex Monorex Si, and Sto Silco. Most manufacturers offer 10–25 year product guarantees.

Get free silicone render quotes from vetted specialist rendering contractors. Describe your property, enter your postcode, and compare up to 3 quotes.

What’s involved

Substrate inspection — repair cracks, treat damp, assess adhesion
Sand-cement base coat applied and levelled if needed
EWI mesh and adhesive layer if external wall insulation is included
Silicone primer applied to promote adhesion
Silicone topcoat trowelled on at 1.5–3mm thickness
Surface scratched, rolled, or sponged to desired texture

Typical costs

Job type
Typical cost
Silicone render (per m²)
£40 – £70
Typical semi-detached house
£4,500 – £8,500
Typical detached house
£7,000 – £14,000
Small extension
£1,000 – £3,500
With EWI insulation (per m²)
£80 – £150
Guide prices only. Get 3 quotes for accurate pricing in your area.

Frequently asked questions

How long does silicone render last?
Silicone render systems from quality manufacturers come with 10–25 year product guarantees. Real-world performance often exceeds this — the hydrophobic nature of the surface prevents the algae and moisture ingress that degrades other render systems.
Is silicone render self-cleaning?
Not fully self-cleaning, but the hydrophobic surface causes rainwater to sheet off rather than soak in, carrying dirt and dust with it. This dramatically reduces algae and moss growth compared to traditional render or painted surfaces.
Does silicone render need painting?
No — colour is integral to the product and does not need painting. This is one of its key advantages: once applied, the only maintenance needed is an occasional wash if heavy algae or traffic grime builds up.
Can silicone render be applied over existing render?
Yes — if the existing render is sound, clean, and not too porous, a silicone topcoat can often be applied directly over it after priming. Full strip and re-render gives the best long-term result, but over-coating is a valid and common approach.
Is silicone render suitable for listed buildings?
Modern silicone renders are generally not appropriate for listed buildings or buildings in conservation areas, where lime or traditional render materials are usually required. Check with your local planning authority before specifying.
What customers say
★★★★★ 4.9 / 5 from verified customers
★★★★★

“Used this to compare quotes for re-skimming our lounge and hallway. Had 3 plasterers contact us the same day. Went with the middle quote and the finish is absolutely perfect. Highly recommend.”

Claire B. Surrey
★★★★★

“Really straightforward. Described the rooms, entered my postcode and had calls from local plasterers within a couple of hours. Saved a significant amount compared to my first quote.”

Mark T. Manchester
★★★★★

“Had a whole house replaster after buying our Victorian terrace. The plasterer recommended through this site was brilliant — on time, tidy and the finish was excellent. No hesitation recommending.”

Janet R. Bristol
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