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Spray cork vs render
An impartial comparison of spray cork and traditional render across cost, durability, appearance, maintenance, waterproofing, insulation and lifespan.
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Render and spray cork solve overlapping problems: both refresh a tired exterior and both offer some weather protection. They differ in cost, texture, flexibility and how they handle moisture.
This guide gives the short version. The full side-by-side table lives on our comparison page.
Cost
Silicone and monocouche render usually undercut spray cork per square metre. Spray cork's premium buys a thicker, more flexible coating with some thermal benefit — whether that premium is worth it depends heavily on the state of your existing walls.
Appearance
Render can be finished smooth, scraped or pebbled and takes a very wide colour range. Spray cork has a distinctive granular, matte texture that reads as softer and warmer, and is usually offered in a more limited palette of muted tones.
Moisture and breathability
Spray cork is promoted as breathable and elastic, which suits older solid-wall properties where trapping moisture behind a rigid coating causes problems. Cement-heavy renders are the least forgiving on those walls; modern silicone renders sit in between.
Which suits which property
Rendered post-war housing in good condition is well served by a straightforward silicone render refresh. Older solid-wall houses, walls with hairline cracking, and homeowners specifically after a textured, matte finish are the strongest cases for spray cork.
Common questions
Can spray cork go over existing render?+
Often yes, provided the render is sound, clean and dry. Loose or hollow render must be cut out and repaired first.
Which lasts longer?+
Well-applied render can last 25–40 years; spray cork is typically quoted at 20–30 years. Both figures assume correct preparation and periodic cleaning.
About the author
The Spray Cork Guide editorial team
Independent home improvement research
We research spray cork products, installer practices and published pricing so UK homeowners can weigh up the decision without a sales pitch. We are not an installer and we do not sell spray cork.
Figures on this page are indicative ranges gathered from publicly advertised UK pricing and homeowner reports. Always get written quotes for your own property.
Want a more accurate figure?
Use the calculator for an indicative range for your own wall area, or request quotes from installers covering your area.
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