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

Internal Wall Insulation in Abertawe / Swansea , Swansea

Call Your Local Abertawe / Swansea Expert
07393 355531
Serving Abertawe / Swansea & Swansea

Expert Internal Wall Insulation Services in Abertawe and Swansea

Global Plastering is your trusted local specialist for internal wall insulation in Abertawe and across the wider Swansea region. Many properties in South Wales, particularly older Victorian terraces and solid wall homes, suffer from significant heat loss through uninsulated walls. We provide bespoke thermal solutions that turn cold, draughty houses into warm, energy-efficient homes. By using high-performance PIR insulation boards and professional dry-lining techniques, we ensure your living space remains comfortable throughout the year while lowering your monthly heating bills.

South Wales and South West England

07393 355531

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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 wall insulation for your Swansea property?

If you live in a property where external wall insulation is not a viable option, such as a home with historic features or planning restrictions in conservation areas, internal wall insulation is the ideal choice. Our process effectively combats thermal bridging and cold wall surfaces that often lead to condensation and mould growth. By upgrading your insulation, you significantly improve your home's EPC rating, making it a much warmer place to live and adding long-term value to your property. Whether you are in a semi-detached house or a bungalow, our experts deliver a clean, efficient finish.

Our PAS 2035 compliant installation process

Quality and compliance are at the heart of everything we do at Global Plastering. Every internal wall insulation project follows the rigorous PAS 2035 retrofit standards to ensure your home is treated with the correct ventilation and material specifications. Our certified team begins with a thorough survey to assess your wall type and moisture levels. We then carefully install insulation boards, ensuring airtight seals before finishing the surface with a high-quality skim. This meticulous approach prevents future damp issues while maximising the thermal efficiency of every room we work on.

Serving homeowners and landlords across South Wales

We support a wide range of clients, from individual homeowners looking to reduce energy costs to landlords who need to meet current Minimum Energy Efficiency Standards (MEES). Improving your property’s thermal performance is essential for modern compliance and tenant satisfaction. Our team operates within a 35-mile radius of our South Wales base, providing reliable and professional service to clients in Abertawe, Swansea, and the surrounding areas. We take pride in our punctuality, cleanliness, and commitment to delivering superior results on every job.

Accredited, insured, and ready to help

When you choose Global Plastering, you are working with a PAS 2030 accredited contractor dedicated to industry excellence. We are fully insured and provide insurance-backed guarantees through SWIGA, giving you complete peace of mind throughout the renovation process. As a CHAS-accredited business, we prioritise safety and professional standards in every home we enter. If you are ready to combat heat loss and improve your indoor climate, our team is ready to assist. Contact us today on 07393 355531 to book your free property assessment in Abertawe or Swansea.

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

Internal Wall Insulation in Abertawe / Swansea And Surrounding Areas

We Cover All of Swansea

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?

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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?

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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?

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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?

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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!

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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