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

Internal Wall Insulation in Ferndale , Rhondda Cynon Taf

Call Your Local Ferndale Expert
07393 355531
Serving Ferndale & Rhondda Cynon Taf

Professional Internal Wall Insulation in Ferndale

If you live in a period home or a solid-wall property in Ferndale, you are likely all too familiar with cold rooms and rising energy costs. Global Plastering provides specialist internal wall insulation (IWI) services designed to transform the thermal performance of your home. Serving clients across Rhondda Cynon Taf and within a 35-mile radius, we help homeowners and landlords modernise older properties while maintaining their original exterior character. As PAS 2030 accredited experts, we are committed to delivering high-quality, long-term solutions for your energy efficiency needs.

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 internal insulation for your Rhondda Cynon Taf home?

Many traditional properties in our region feature solid walls that act like a heat sink, drawing warmth out of your living space and into the outside air. Installing internal wall insulation involves fixing high-performance insulation boards to your inner walls, creating a thermal barrier that keeps the heat exactly where you want it. This method is particularly effective for Victorian terraces, semi-detached homes, and even non-traditional builds like Cornish or Airey units. If your home is in a conservation area or has external features you wish to preserve, IWI offers the perfect way to improve your EPC rating without changing the appearance of your property.

How our PAS 2035 retrofit process works

We take a systematic approach to every installation, ensuring your home is fully compliant with current PAS 2035 retrofit standards. The process begins with a comprehensive technical survey of your property to assess its unique requirements. Our team then installs moisture-resistant insulation boards, carefully accounting for window reveals, skirting boards, and electrical points. We pay close attention to vapour control, ensuring that your home remains breathable and free from interstitial condensation. Once the insulation is securely installed, we finish the walls with a professional plaster skim, leaving them perfectly smooth and ready for you to decorate.

Damp prevention and long-term thermal comfort

A common concern when insulating internal walls is the risk of trapped moisture. At Global Plastering, we treat damp prevention as a critical part of the installation process. By using advanced vapour control layers and breathable systems, we ensure that your walls are protected against condensation buildup. This approach not only keeps your property warm and dry but also improves the overall air quality within your living spaces. Our expertise ensures that your insulation investment provides lasting comfort rather than hidden problems.

Trust our accredited team for your property upgrade

Choosing the right contractor for energy efficiency upgrades is essential for your peace of mind. Global Plastering holds CHAS accreditation and provides SWIGA insurance-backed guarantees, giving you full confidence in the quality of our workmanship. We are proud to serve the community in Ferndale and across the broader South Wales and South West England region. Whether you are a landlord managing HMO properties to meet MEES standards or a homeowner looking to slash your energy bills, our experienced team is ready to assist. Contact us today at 07393 355531 to book your free, no-obligation survey and take the first step toward a warmer home.

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