info@kelmendrendering.co.uk
020 8894 3372
Rendertherm provides professional external wall insulation (EWI) systems that improve energy efficiency, reduce heat loss, and transform the appearance of your property. Our fully installed systems combine high-performance insulation with durable render or façade finishes, delivering long-term thermal and visual benefits for residential and commercial buildings.
External wall insulation is a complete system installed to the outside of a building. Insulation boards are mechanically fixed and bonded to the external walls, reinforced with a basecoat and mesh, and finished with a high-performance render or façade system.
Unlike internal insulation, EWI improves thermal performance without reducing internal floor space, while also upgrading the external appearance of the building.
Rendertherm installs fully certified EWI systems designed to meet modern building regulations and long-term performance standards.
👉 Not sure if your property is suitable? Speak to an EWI Specialist
Significantly reduces heat loss and improves U-values.
Helps retain heat, reducing heating costs year-round.
Choose from modern renders or brick slips.
Warmer walls mean less internal condensation risk.
Get expert advice on which facade system suits your property, speak to our team.
We install a range of EWI systems tailored to your property, location, and performance requirements.
1. EPS (Expanded Polystyrene) - Cost effective and widely used
2. Mineral Wool - Excellent fire and acoustic performance
1. Silicone Render
2. Clay Brick Slips
3. Mineral Brick Slips
👉 Request a system reccomendation Speak to our team!
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Upgrade your property’s energy efficiency and appearance with a professionally installed external wall insulation system from Rendertherm.