Retrofit Insulation & External Rendering Services
Professional, energy-efficient insulation upgrades and high-performance rendering solutions across South Wales and the South West. Stop heat loss, cure damp, and lower your energy bills today.
Eliminating Cold Homes & Sky-High Heating Bills
At Global Energy Insulation, we understand the frustration of living in a cold, draughty property. Solid walls, poor roof insulation, and weathered, failing exterior walls contribute to immense heat loss, rising utility bills, and persistent problems like condensation and black mould.
As premier industry-leading insulation and PAS 2035 retrofit specialists, we deliver whole-house thermal upgrades tailored to your property type. From Victorian terraces and non-traditional concrete builds to modern commercial offices and HMOs, we handle the entire project from initial design and compliance right through to the final decorative render.
Plus, with our close partnership with our sister company, Global Plastering, we provide a seamless, end-to-end service. Whether we are installing internal wall insulation (IWI) or repairing complex ceilings, our sister team steps in to execute flawless traditional plastering and skimming. No need to manage multiple subcontractors—we coordinate everything under one roof.
Comprehensive Thermal & Rendering Solutions
We specialise in highly regulated, high-performance measures designed to secure your building envelope, reduce carbon emissions, and permanently lower running costs.
External Wall Insulation (EWI)
The ideal thermal treatment for solid brick, concrete, or non-traditional properties. Wrap your home in an efficient thermal blanket, eliminating thermal bridging while giving your facade a modern, weather-resistant upgrade.
Internal Wall Insulation (IWI)
Perfect for listed buildings, properties in conservation areas, or homes where preserving the external facade is essential. Using high-performance PIR boards, finished with expert plastering by Global Plastering.
Modern External Rendering
Protect your property from damp and harsh weather. We apply premium self-cleaning silicone render, Monocouche, and K Rend systems to offer a stunning, low-maintenance finish that lasts for decades.
Loft & Roof Insulation
Over a quarter of your home’s heat escapes directly through an uninsulated roof. We install premium, fire-resistant fibreglass and mineral wool insulation to the correct regulatory depth of 270mm to lock heat in.
Cavity Wall Insulation
An extremely cost-effective, non-disruptive method to improve your home’s EPC rating. We inspect existing cavities for structural soundness before injecting industry-approved, high-efficiency insulating materials.
Commercial & Landlord Retrofitting
Ensure your portfolio meets the Minimum Energy Efficiency Standards (MEES). We support commercial businesses and landlords in raising their EPC levels to remain legally compliant and energy-efficient.
Unsure which insulation service is right for your property?
Speak to our PAS 2030 accredited team for expert advice and a comprehensive property assessment.
The Retrofit Journey: How We Work
We deliver peace of mind by handling all domestic and commercial projects under strict PAS 2035 retrofitting standards.
Comprehensive Assessment
Our certified Retrofit Assessors conduct an in-depth survey of your property, analyzing ventilation, existing U-values, and identifying thermal bridging issues.
Bespoke Design
We draft a tailored insulation strategy to meet Building Regulations (Part L), avoiding condensation pitfalls and selecting the optimal system for your build.
Expert Installation
Our highly qualified, PAS 2030 compliant team installs the chosen system. Internal plasterboarding is seamlessly prepared for a final skim by Global Plastering.
SWIGA Guarantee & Signoff
We perform comprehensive quality checks. On completion, your property receives an updated EPC rating and a robust SWIGA insurance-backed guarantee.
Expertise Across All Property Types & Regulations
In the UK, retrofitting insulation isn't just about sticking boards on walls. It is about understanding the fabric of a property. Our region features a diverse mix of architectural history, from stone Victorian terraced homes with solid walls to non-traditional system-built properties like Wimpey no-fines, Airey, and Cornish unit properties.
At Global Energy Insulation, we ensure every project strictly adheres to current UK Building Regulations, emphasizing adequate continuous ventilation to prevent interstitial condensation.
- ✔ Conservation & Planning: We advise on and handle planning applications for EWI alterations or install IWI to keep listed buildings compliant.
- ✔ Damp Mitigation: Every measure is designed alongside modern ventilation strategies to banish condensation and black mould.
- ✔ PAS 2035 Compliance: Protecting funding paths and landlord investments with fully managed coordination support.
Serving South Wales & South West England
Based in Ferndale, Rhondda Cynon Taf, we operate within a 50–60 mile radius, delivering expert domestic and commercial installations to homes and commercial spaces across the region.
Rhondda Cynon Taf
Ferndale, Pontypridd
Cardiff & Newport
Capital Region & Gwent
Swansea & Neath
West Wales Corridor
Bridgend & RCT
Valleys & Coastal Plain
Bristol & Bath
South West Hubs
Gloucestershire
Gloucester, Cheltenham
Somerset
Taunton, Weston-super-Mare
Merthyr & Brecon
Beacons & Valleys
Why Choose Global Energy Insulation?
We hold every essential regulatory accreditation to ensure your property remains safe, compliant, and backed by robust long-term guarantees.
PAS 2030 Accredited
Fully compliant with government retrofitting standards, ensuring safe design and professional installations.
SWIGA Backed
Solid Wall Insulation projects are covered by a comprehensive Solid Wall Insulation Guarantee Agency warranty.
CHAS Accredited
Meeting premium UK health and safety benchmarks across all residential and commercial sites.
Licensed Waste Carrier
We responsibly dispose of all construction and installation waste, leaving your property spotless.
The Complete End-To-End Advantage
One of the biggest concerns for homeowners undertaking internal wall insulation (IWI) is the final plaster finish. When you work with us, you don't need to hunt for local plasterers.
Our sister company, Global Plastering, steps in immediately following board installation to skim, finish, and dryline to professional commercial standards. This strategic partnership ensures your home transition remains seamless, clean, and beautifully finished.
Frequently Asked Questions
Do I need planning permission for External Wall Insulation (EWI)?
Generally, EWI is considered Permitted Development. However, because it alters the external appearance of your home, you will need planning permission if your property is a listed building, in a conservation area, or subject to local restrictive covenants. Our team handles the local authority checks and coordinates compliance.
What is the difference between EWI and IWI?
External Wall Insulation wraps the exterior of your building in high-density insulation boards and a weatherproof render finish, which does not impact your internal floor area. Internal Wall Insulation involves fitting insulation boards directly to the inner face of the walls inside your rooms, which is then boarded and plastered. IWI is excellent when external alterations are prohibited.
How long does a typical retrofit installation take?
A standard domestic External Wall Insulation and rendering project typically takes 2 to 3 weeks, depending on weather and the size of your property. Internal wall upgrades depend on the number of rooms, but we always work efficiently to minimise disruption, working hand-in-hand with Global Plastering to deliver rapid finishes.
How does proper insulation stop damp and black mould?
Most domestic damp and black mould is caused by warm, moist air inside the house meeting freezing cold, uninsulated external walls. This temperature drop causes condensation. By insulating the walls (either internally or externally), we raise the surface temperature of the wall above the dew point, permanently removing the environment that supports black mould growth.
Protect Your Home Against Rising Energy Costs Today
Do not wait for another freezing winter or struggle under high fuel bills. Safeguard your property’s structural integrity and thermal comfort with South Wales' premier retrofitting specialists.
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