EWI specialists in Surrey
PlasterSmart specialise in high-performance external wall insulation and render systems for solid wall and traditionally built properties. Many homes across Surrey and the South East suffer from cold walls, condensation and high heating costs due to poor insulation.
We are EWI PRO approved installers providing systems that improve thermal efficiency while protecting and upgrading the exterior of your property. Each project is tailored to the building’s construction to ensure reliable, long-term performance. The result is a warmer, more comfortable home, reduced heat loss and a complete external transformation.
Not sure if external wall insulation is right for your home?
We’re happy to assess your property and advise whether EWI is suitable, or if an alternative solution would be more appropriate.
External Wall Insulation Options
Many homes with solid walls suffer from cold surfaces, condensation and high heating costs.
There is more than one way to improve wall performance, and the best solution depends on your property type, construction and budget.
At PlasterSmart, we offer two main external insulation solutions and can advise which is most suitable for your home.
External Wall Insulation Systems
External wall insulation involves fixing insulation boards to the outside of the property and finishing them with a reinforced render system. This type of system is commonly used on solid wall and traditionally built homes to improve thermal performance.
By insulating the building externally, heat loss through the walls is reduced, helping to create warmer internal surfaces and improved comfort throughout the home.
PlasterSmart are EWI Pro approved installers, using manufacturer-specified external wall insulation systems designed for long-term performance and durability. This ensures each installation is carried out correctly and built to last.
External wall insulation is often chosen as part of full exterior upgrades, providing both improved energy efficiency and a complete transformation of the property’s appearance.
Key benefits of external wall insulation
• Improves thermal efficiency and reduces heat loss
• Creates warmer, more comfortable living spaces
• Enhances and protects the exterior of the property
• Long-lasting system when installed to specification
the property’s appearance.
Spray Cork Insulated Render
Spray cork insulated render is a thinner, cork-based thermal coating that can be applied directly to suitable backgrounds or, in some cases, over existing stable render. It provides a breathable and flexible solution that helps improve wall surface temperature while refreshing the external appearance of the property.
At PlasterSmart, we are CorkSol approved installers, using manufacturer-specified spray cork systems backed by a 25-year warranty. This ensures the system is applied correctly and performs as intended long term.
Spray cork is commonly chosen where a full external wall insulation system is not required, or where a thinner, more breathable solution is preferred. It can also be used as an overspray to protect ageing render and help manage hairline cracking.
This system offers an effective balance between thermal improvement, durability and appearance, making it a popular option for many properties across Surrey.
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Key benefits of spray cork insulated render
• Breathable and moisture-tolerant system
• Flexible finish that accommodates movement
• Improves wall surface temperature and comfort
• Can be applied over suitable existing render
• Backed by a 25-year CorkSol warranty
Every property is different. The correct solution depends on wall construction, moisture movement, existing render condition and the level of insulation required.
We assess each property individually and advise whether full external wall insulation or a cork-based thermal render system is the most appropriate option.
Not sure which option is right for your home?
Get in touch and we can assess your property and advise on the most suitable solution.
Why choose PlasterSmart for your EWI project?
We are approved by EWI Pro & Corksol
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Specialist Knowledge
We have extensive experience working with external wall insulation systems and understand how different property types behave, allowing us to recommend the most suitable solution. -
Whole-System Approach
We look at the building as a whole, considering wall construction, existing finishes and moisture movement to ensure the system performs properly long term. -
Quality Materials
We use trusted insulation systems and high-quality materials designed to deliver reliable thermal performance and durability. -
Clear Communication
We take the time to explain your options clearly, keeping you informed throughout the process from assessment through to completion. -
Honest Pricing
All work is clearly quoted with transparent pricing, giving you confidence with no hidden costs.
Choose PlasterSmart for external wall insulation carried out with care, experience and long-term performance in mind.
Get in Touch
PlasterSmart provides professional external wall insulation and thermal upgrade solutions across Surrey and the surrounding areas. With over 40 years of experience, we help homeowners improve comfort, reduce heat loss and upgrade the external performance of their properties.
If you’re considering external wall insulation or spray cork insulated render, get in touch to discuss your options or arrange a site assessment.
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Areas we cover inc: Chertsey
Egham
Staines
Addlestone
Weybridge
Walton-on-Thames
Sunbury-on-Thames
Ashford (Middx) -
Epsom
Banstead
Leatherhead
Reigate
Redhill
Esher
Cobham
Oxshott -
Guildford
Woking
Farnham
Camberley
Godalming -
& More
Contact us for a free quote!
Thank you for considering us for your project. Please fill out our contact form below including a brief description of your job requirements. If you have any pictures that can help us better understand your needs, please include them. We look forward to hearing from you.