EWI Pro Approved Contractors in Bristol and North Somerset
Webster SRS are EWI Pro Approved Contractors, fully trained at the EWI Pro Training Academy in Birmingham. Our expert team has hands-on experience in the full EWI installation process, installing external wall insulation on a wide range of building types, from solid brick walls and stone walls to solid masonry walls and cavity walls.
By choosing EWI Pro certified installers, you gain total peace of mind that your external wall insulation system will meet the highest standards of maximum thermal efficiency, durability, and compliance with building regulations. Our approved installers use advanced external wall insulation products that offer excellent thermal insulation, are moisture resistant, fire resistant, and mould resistant, ensuring your property is well protected.
We can also offer 10-year manufacturer-backed warranties on all EWI Pro systems, giving you long-term protection and confidence in your home insulation investment. Our specialist training means we are certified to install advanced external wall insulation products that protect your external walls, improve your home’s external aesthetics, and enhance energy efficiency across your property, while reducing your carbon footprint.
Our external wall insulation systems use materials such as phenolic foam, expanded polystyrene, and mineral wool to provide thermal and acoustic insulation. These systems are finished with high-quality render systems, including silicone render, acrylic render, and monocouche render, offering decorative finishes and a water resistant, crack resistant, and weather resistant protective layer.
Choosing Webster SRS for your EWI project means benefiting from an installer network committed to quality workmanship, using pre coloured base coats and one base coat render options to create the desired look and textures making your home’s external aesthetics increase, all while reducing internal floor space loss compared to internal insulation alternatives.
External Wall Insulation Systems
Our specialist training means we are certified to install advanced external wall insulation products that protect your external walls, enhance thermal efficiency, and improve energy efficiency across your property.
With the right insulation system, you can:
- Lower your heating bills and reduce heat loss
- Improve your home’s thermal performance and sound resistance
- Prevent damp problems, condensation, and moisture penetration
- Meet modern building regulations and sustainability standards
- Protect your external surface from water ingress and weather damage
Cavity Wall Insulation and Solid Wall Insulation
Not every home has the same structure, so our expertise covers:
- Cavity wall insulation – Suitable for smaller properties or where cavity walls can be filled with insulating material such as expanded polystyrene or mineral wool.
- Solid wall insulation – For solid brick walls, stone walls, and solid masonry walls, we offer external insulation and internal wall insulation options to suit your property.
- Solid wall insulation systems – Using advanced insulation boards and insulation materials, we can insulate outside walls and internal walls with the right thickness and layer to maximise thermal efficiency.
Whether you choose external insulation or internal insulation, the goal is the same: reduce heat loss, improve energy efficiency, and make your home warmer.
External Wall Insulation Products and Render Systems
As approved installers, we work with trusted manufacturers to deliver durable, attractive, and high-performing external wall insulation systems. These include:
- EWI Pro – Advanced external wall insulation products with full manufacturer warranties.
- EcoRend – Webster SRS was handpicked as the first company in the county to install their new EWI systems.
- VPI – Trusted approval for a wide range of EWI and render systems including heritage and modern finishes.
Each insulation system is designed to not only improve energy efficiency but also enhance the external appearance of your home, with a choice of cladding, render, and finishes to suit various substrates and conservation area requirements.
Reduce Energy Bills and Improve Energy Efficiency
Adding insulation to your walls can dramatically cut heating bills, reduce heat loss, and help with sound resistance. Properly installed external insulation systems also:
- Protect window sills, external fittings, and outside walls from damage
- Prevent condensation, damp problems, and water ingress
- Provide flexibility in materials such as phenolic foam, mineral wool, and expanded polystyrene
- Maintain compliance with planning permission and local authority requirements
- Create a whole house insulation solution for long-term comfort
With the right insulation materials and installation, your property will be more comfortable, more efficient, and better protected for years to come.
Financial Support for Home Insulation
Improving your external walls with solid wall insulation or cavity wall insulation is not just about comfort – it can also qualify for financial support through certain grants and schemes. Webster SRS can advise on available funding to make external wall insulation systems more cost-effective for homeowners.
Why Choose Webster SRS for External Wall Insulation
- Certified and approved installers with EWI Pro, EcoRend, and VPI
- Full 10-year manufacturer warranties on approved systems
- Experienced in all building types including brick walls, stone walls, and solid masonry walls
- Experts in choosing the right insulating material, render system, and thickness for your property
- Commitment to thermal efficiency, energy performance, and external appearance
Contact Webster SRS today
Get in today to discuss external wall insulation for your home or property. Our team of certified installers will help you choose the right insulation system to reduce heating bills, protect your outside walls, and improve the comfort of your home.



