Frequently Asked Questions

No, it is a textured finish. It’s slightly stippled, and it is the granulation of the cork which gives it its performance.

Yes, it is possible to go over existing renders and other substrates and still get a 25-year product warranty. However, just to manage expectations, SprayCork will not hold your wall together so any blown or shot render will need to be rectified first. For example, if you have sand and cement render which is painted and has hairline or settlement cracks, as long as the substrate is solid you can go direct onto the render. The best thing to do is get an Approved Applicator to do a site survey and they will be able to advise you.

Yes, absolutely. SprayCork will go directly onto pebble dash, roughcast, dry dash, wet dash or stippled paint. Please note the overall thickness of SprayCork is around 6mm so the texture of the dash will still be visible. However, the finish will look more subtle and is very effective. If a smoother finish is required, a base coat will be needed first. Please speak to an Approved Applicator or our in-house technical team if you're unsure.

Yes, SprayCork will stick to any substrate (apart from silicone), including brickwork. As the overall thickness is around 3-4mm you will still see the mortar lines of the bricks. If you want a smoother finish a base coat will need to be applied before spraying the cork. Either finish looks effective so it is purely personal choice and/or budget. If the bricks are dusty a primer may be needed but the Approved Applicator will advise on this. If any pointing is missing this will need to be repaired prior to spraying.

Each job is different due to access, size and condition of the building, location etc so we will need to conduct a site survey to quote. On very rare occasions, it may be possible for us to give a guide price based on photos. If you're unsure if your job is suitable for cork or would like some technical guidance, call 07808524932 and speak with Colin. Colin will be able to discuss the product with you, explain the work involved and confirm if the job is suitable for SprayCork when they’ve been able to study the photos. The photos can be emailed to info@corksprayinsulation.co.uk prior to your call.

This is probably the most asked technical question. We don’t give a U-Value for the product on its own as that is determined by the complete build of the wall. If you wish to calculate the U-Value of your wall, SprayCork’s Lambda value is 0.058W/mk. We have test results which demonstrate the potential reduction in the U-Value, and these may be viewed in the blog section of our website. As SprayCork is one continuous skin with no joins or gaps, it improves air tightness of the walls which isn’t measured in U-Value testing.

We have a standard colour range with 28 fade resistant colours. We also have a colour pigment machine in house which can make up to 1800 colours so if you have a specific RAL code we can make this colour (min order required 300m2 or development cost on smaller orders) for any commercial property orders.

See the colour range here https://corksprayinsulation.co.uk/colour-range/

Cork has evolved over millions of years in coastal areas of the Mediterranean and has become naturally resistant to sea salts. SprayCork is resistant to sea salts and algae. If your property is on the coast be aware your house/building will need to be specially washed and treated before application. Talk to us about this.

Yes, you can jet wash the cork but don’t get too close. If the pressure is too high, it will damage the cork (pressured water is a very effective blade!). Cork has anti-microbial properties and naturally resists against algae but an annual clean is recommended.

The warranty is provided by the manufacturer and relates to the product only.  The product warranty is for 25 years. The warranty covers any issues with the product failing. It excludes damage caused to the product after installation or poor workmanship.

The easiest and fastest way to get a sample delivered is to call us direct on 07808524932 and request a sample in a colour of your choice. The colour range is available here.

If you have requested a quote, we will have colour swatches and colour charts when we visit the property.

SprayCork can be painted although this shouldn’t be necessary as it is long lasting and available in a range of colours. Care should be taken to use a paint which is breathable and as natural as possible to avoid making the warranty invalid. Painting may affect the breathability or fire resistance of the product, so we do not recommend it.

This is a great question and one to definitely consider when upgrading your property. SprayCork can be sprayed internally then skimmed/plastered over to create TIWI (Thin Internal Wall Insulation) at only 8mm including smooth finish and paint. Alternately SprayCork can applied externally on your home/building to refresh and dramatically improve the appearance, as well as offering a multitude of benefits. Either option gives flexibility, breathability, thermal and acoustic insulation, mould and condensation elimination and fire resistance.

The performance remains the same. Both options have been tested to ISO9869 and offer around 30% energy savings on heat transfer through walls. Internal application is advisable for dealing with condensation or black spot mould and is particularly useful in heritage buildings or areas where external application isn’t possible.

The application process is the same for internal and external applications. As long as you have a clean dry surface the SprayCork will adhere to any substrate except pure silicon. The product is a sprayed application either sprayed by a gravity fed hopper gun or a spray machine which can spray with a 6mm nozzle (airless does not work).

Two coats need to be sprayed to build the product up to a thickness 3-4mm. For internal works the SprayCork can be skimmed/plastered directly onto with no primer/PVA please note drying times are significantly slower and Multi-finish, Board-finish and airless plasterers all work.