Modern house with exposed blockwork prepared for external wall insulation and rendering in South Wales

Internal Wall Insulation in Y Bont-Faen / Cowbridge , Vale of Glamorgan

Call Your Local Y Bont-Faen / Cowbridge Expert
07393 355531
Serving Y Bont-Faen / Cowbridge & Vale of Glamorgan

Expert internal wall insulation for homes in Cowbridge

Global Plastering provides professional internal wall insulation services for homeowners throughout Y Bont-Faen and Cowbridge. If your property suffers from cold walls, persistent draughts, or high energy bills, we offer a tailored solution to improve your thermal comfort. Many historic properties in the Vale of Glamorgan feature solid walls that lose heat rapidly. Our experienced team specialises in retrofitting these homes with high-performance thermal insulation boards and vapour barriers, ensuring your living space stays warmer for longer while significantly reducing your carbon footprint.

South Wales and South West England

07393 355531

Get An Estimate

Our Trusted Partners & Brands

Freshly plastered and skimmed white walls in a modern dining room completed by Global Plastering in South Wales
PAS 2030 Accredited IWI Installers

Expert Internal Wall Insulation Across South Wales

Based in Ferndale, Global Plastering provides highly efficient internal wall insulation (IWI) for properties throughout a 60-mile radius, covering South Wales and South West England. From solid wall Victorian terraces to complex commercial retrofits, our PAS 2035 compliant solutions drastically reduce heat loss, lower soaring energy bills, and instantly improve your EPC rating.

Why choose IWI for your period property

Internal wall insulation is the ideal choice for homes where external changes are restricted, such as listed buildings or those in local conservation areas. By applying insulation to the interior of your walls, we protect the unique aesthetic of your exterior brickwork or stone facade while drastically improving your home's energy efficiency. This process is particularly effective for Victorian and Edwardian terraces common in the area, providing a comprehensive solution to thermal bridging and condensation control. Once installed, we apply a high-quality skim finish to ensure your walls are ready for immediate decoration.

Our approach to PAS 2035 and building standards

As a PAS 2030 accredited company, we manage every installation according to the latest PAS 2035 retrofit standards. This systematic approach ensures that your home is assessed correctly, and the right combination of materials is chosen for your specific wall construction. Whether you reside in a detached family home or a local HMO, our experts provide the technical oversight needed to improve your EPC rating. We take pride in our precision, ensuring every installation is vapour-managed to protect your property's long-term health.

What are the benefits of solid wall insulation

The primary advantage of internal wall insulation is the immediate increase in thermal comfort and a reduction in annual heating costs. By creating a thermal envelope, you stop heat from escaping through your walls, which allows your boiler to operate more efficiently. Beyond the financial savings, our work helps prevent mould growth by balancing surface temperatures, creating a healthier living environment for you and your family. For landlords operating in the Vale of Glamorgan, this is also a reliable way to ensure your property meets current MEES energy efficiency regulations.

Serving the Vale of Glamorgan with trusted expertise

Global Plastering operates across a 35-mile radius, serving clients from Y Bont-Faen and Cowbridge to the surrounding villages of the Vale of Glamorgan. We are proud to be a local team that prioritises quality craftsmanship and regulatory compliance. Our work is supported by insurance-backed guarantees through SWIGA, and our CHAS accreditation demonstrates our commitment to safe, professional practices on every site. From your initial energy assessment to the final professional skim, we are your local partners in creating a more sustainable home. Contact our team on 07393 355531 to book your free survey and discuss your specific insulation requirements.

Why Choose Global Plastering?

Your trusted, PAS-accredited experts in internal wall insulation, delivering outstanding energy efficiency and flawless finishes across Ferndale, South Wales, and the South West.

Local South Wales Experts

Based in Ferndale, we cover a 60-mile radius through to Bristol. We possess deep expertise in retrofitting Victorian, terraced, and solid wall properties.

Fully PAS 2030 Accredited

We are fully PAS 2030 compliant and CHAS registered. We provide comprehensive SWIGA insurance-backed guarantees for absolute peace of mind.

Flawless Plastered Finishes

Internal wall insulation involves careful dry-lining and skimming. As highly experienced plasterers, we ensure your newly insulated walls are impeccably smooth.

Lower Bills & Better EPC

Tackle soaring energy costs, draughts, and cold spots. Our tailored IWI solutions reduce heat loss and guarantee vital improvements to your property's EPC rating.

Internal wall insulation being installed with Mannok PIR boards between timber studs in a South Wales property.
Call Now for a Free Quote

Plastering Services Across South Wales and South West England: 07393 355531

What Our Clients Say About Global Plastering

"Excellent work the team removing our old 1970's cladding and replacing it with insulation and a rendered finish. The job went smooth from start to finish with all old materials removed from site. We are very pleased with the end result and would thoroughly recommend Global Plastering."

A. Jenkins (Ferndale)

"Dilwyn and his team were brilliant and made a lovely job of our EWI. They were very friendly, hard-working, and left no mess at the end of each day. Our house looks great and we can definitely feel the benefits of the insulation already. I'm very glad we chose EWI especially with energy costs as they are now."

G. Toogood (Bristol)

"Charlotte and the team were professional, reliable, and excellent at communicating throughout. They did a fantastic job of skimming and rendering the back of our house during our renovation. Superb quality of work and highly recommended!"

M. Lewis (Cardiff)

FAQ

Frequently Asked Questions

Answers to common questions about our internal wall insulation services, heat loss solutions, and PAS 2030 compliant retrofits in South Wales and South West England.

How much space will I lose inside my rooms?

+

This is a common concern for homeowners in Ferndale. Modern high-performance insulation boards are incredibly efficient, meaning we can achieve great thermal results with relatively thin materials. You will typically lose about 60mm to 100mm on the treated walls. Most customers find this small trade-off is well worth it for a home that is significantly warmer and cheaper to run.

Will IWI cause damp or condensation in my home?

+

When installed correctly by experts like us, IWI actually helps reduce the risk of surface condensation. By warming up the internal surface of the wall, you remove the "cold spot" where moisture in the air usually settles. We use vapour control layers and ensure proper ventilation is maintained to keep your home healthy and breathable.

Can I still hang pictures and shelves on insulated walls?

+

Yes, you certainly can. While you need to be mindful of the depth of the insulation, we can advise you on the best fixings to use. For heavy items like radiators or kitchen cupboards, we plan ahead and install "pattresses" or extra timber supports behind the boards during the installation process.

Is there a lot of mess during the installation?

+

We won't sugar-coat it—any internal work involves some disruption. However, we pride ourselves on being respectful guests in your home. We cover flooring, protect your furniture, and clear away all debris. Because we are professional plasterers by trade, we ensure the finish is top-tier, leaving you with a blank canvas ready for paint.

Still have questions? Contact our South Wales and South West England Plastering experts today!

Call Us Now

Proudly Serving South Wales & South West England

Global Plastering are your trusted, PAS 2030 accredited insulation and rendering experts. Based in Ferndale, Wales, we cover a 60-mile radius, providing high-quality external wall insulation (EWI), internal wall insulation (IWI), and premium silicone rendering to reduce energy bills and transform cold houses. Explore our primary service areas below.

Our Key Service Areas

South Wales

  • Rhondda: Ferndale, Pontypridd, Porth
  • Cities: Cardiff, Swansea, Newport
  • Surrounding: Bridgend, Merthyr Tydfil
  • Specialists in upgrading terraced and solid wall homes
  • Experienced in Cornish and Airey non-traditional builds

South West England

  • Bristol and the M4 Corridor
  • Bath, Gloucester, and Cheltenham
  • North Somerset and surrounding borders
  • Expert rendering for Victorian and Edwardian properties
  • Commercial insulation and decarbonisation projects

PAS Accredited Experts

  • Fully PAS 2030 and PAS 2035 compliant
  • SWIGA insurance-backed guarantees provided
  • CHAS registered for commercial health & safety
  • Deep understanding of MEES compliance for HMOs

Book a Free Retrofit Survey

Contact Global Plastering today for a no-obligation quote on insulation, rendering, or plastering across Wales and the South West.

Call 07393 355531

If your specific location within our 60-mile radius isn't listed, please don't hesitate to get in touch. We cover all domestic, commercial, and landlord properties within this area.

Our Operating Radius & Coverage

Map shows our primary service areas across South Wales and South West England.

Book Your Free Internal Wall Insulation Survey Today!
Call South Wales and South West England's Trusted Plastering Experts on 07393 355531