Expert Internal & External Wall Insulation Services

At Renlon Home, we offer professional internal and external wall insulation services that help homeowners improve energy efficiency, reduce heat loss, and protect their property—all while maintaining or even enhancing its appearance.

Book a Survey

External & Internal Wall Insulation

Certified Expertise
Guaranteed Solutions
Heritage Preservation
Eco-Friendly Practices
Comprehensive Support

Boost Your Home's Comfort 

Our internal and external wall insulation services are designed to dramatically reduce heat loss and cut energy bills — especially in properties with solid walls or older construction.


Whether you're insulating from the inside or outside, our team will recommend the most effective solution for your property type and living needs. We ensure that all works are fully compliant with current building regulations, and completed to the highest standard with minimal disruption.

Why Wall Insulation Matters

Wall insulation can account for up to 35% of heat loss in uninsulated homes. Investing in proper insulation:


  • Helps reduce your heating costs year-round
  • Improves indoor temperature control and comfort
  • Reduces carbon emissions and environmental impact
  • Enhances the appearance of your property (with external insulation)
  • Increases your property’s value and energy rating



Whether you own a period home, detached house, or terraced property, we’ll guide you towards the most effective insulation system for your walls.

Tailored Solutions

Every home is different—so we don’t take a one-size-fits-all approach.


  • Internal Wall Insulation: Ideal for solid brick or stone walls where external insulation isn’t suitable (e.g., conservation areas). We use high-performance insulation boards and breathable materials to retain heat while preventing moisture build-up.
  • External Wall Insulation: Applied to the outside of your home with a protective render finish. It improves insulation and transforms the look of your property, while protecting it against the elements.



Our insulation specialists will carry out a full property assessment and recommend the right materials and techniques for long-term performance and visual appeal.

What Makes Renlon Home Different?

Certificate icon
Certified Expertise

We’re fully qualified with CSSW and CSRT certifications — so you can be confident you’re getting expert advice and safe, compliant installation.

Hand holding spanner icon
Made-to-Measure Solutions

From compact flats to large detached homes, we design every insulation solution to meet your property’s size, structure, and performance goals.

Award icon
Long-Term Protection

All our insulation work is backed by a 10-year guarantee for total peace of mind and
long-term savings.

Testimonials

Insulation Services that Work for You

At Renlon Home, we help you insulate your walls the right way — without cutting corners. From reducing thermal bridging and preventing damp to improving overall energy performance, our wall insulation services are tailored to preserve both the function and character of your home.

FAQs

Explore our FAQs to better understand our internal and external wall insulation services and how they can benefit your property.

  • Do I need planning permission for insulation work?

    Most insulation projects typically do not require planning permission, but it's advisable to consult your local authority, especially for listed buildings or properties in conservation areas.

  • How long does the installation take?

    The project's duration and the installed insulation type determine the timeline. We provide an estimated timeline during the initial assessment.

  • How long will the insulation last?

    Our insulation materials are engineered for durability and long-term performance. With proper upkeep, they can endure for many decades. Additionally, we offer a 10-year guarantee on all our insulation services.

  • Can I customise the insulation solutions to suit my home’s specific needs?

    We specialise in creating tailored insulation solutions that are specifically designed to meet the individual needs and requirements of your home.

  • How does your process work?

    Our process begins with an assessment using high tech instruments to select the best insulation for your home. After preparing the walls, we apply the chosen material and seal all joints to prevent heat loss. We then conduct a final inspection and provide a detailed report and warranty.

Who we work with

Need Help With Your Home?

A member of our friendly team will be more than happy to assist you.