FREE Internal
Wall Insulation


Free Internal Wall Insulation Hamilton

Envirohomes Renewables stands as Hamilton’s premier expert in internal wall insulation, dedicated to enhancing energy efficiency and reducing energy bills for homeowners. As a leading provider of renewable home services in Hamilton, we prioritize the installation of internal wall insulation, along with other renewable solutions, especially for low-income households receiving benefits.

Through the Government’s ECO 4 scheme, we offer fully funded internal wall insulation services, ensuring top-notch quality with our team of highly trained installers certified with PAS 2030 accreditation.

Securing a free insulation grant in Hamilton and across Scotland is facilitated through various schemes, with the Energy Company Obligation 4 (ECO4) scheme being one of the largest. This government-backed initiative, running until March 2026, targets heating system upgrades to reduce carbon emissions while addressing fuel poverty and improving energy efficiency for homes in Scotland and the wider UK.

internal insulation

Who Is Eligible
For The Internal Wall Insulation Grant?

Envirohomes Renewables aids qualified individuals in acquiring and executing various home improvement enhancements via the ECO4 scheme, in line with governmental goals to alleviate fuel poverty and attain carbon neutrality by 2050.
Here are the criteria needed to be eligible for this grant

ECO Scheme grant eligibility

    • Those earning less than £19,720 annually.
    • Homeowners, private tenants, or occupants of social housing.
    • Those receiving specific benefits like Child Benefit, Income Support, etc.
    • Pensioners aged 60 and above who receive Pension Credit Benefits.
    • Properties with an Energy Performance Certificate (EPC) rating of D or lower.

What Is Internal Wall Insulation?

Internal wall insulation is a highly effective method employed to enhance the energy efficiency of buildings. It entails the application of insulation materials, typically rigid insulation boards or mineral wool fibers, with thickness ranging from 60 mm to 100 mm, onto the interior surfaces of external walls.

By creating an additional thermal barrier within the building structure, this process significantly reduces heat loss, thereby contributing to improved energy conservation and lower heating costs.

This insulation technique is particularly advantageous for properties that lack cavity walls or where the installation of cavity wall insulation is impractical or not feasible. Additionally, internal wall insulation can help regulate indoor temperatures more effectively, leading to increased comfort for occupants while also potentially extending the lifespan of the building’s heating systems.

What is the difference between
internal wall, cavity wall and solid wall insulation?

While all these insulating techniques serve as energy efficiency improvements, they do vary slightly in their function and application.

Internal insulation is a specialized approach intended for properties characterized by solid walls. This method concentrates on the insulation of the inner surfaces within the building structure, effectively enhancing its thermal efficiency and energy conservation capabilities.

  • Insulation materials usually vary between 60 mm to 100 mm thick and can be either rigid boards or mineral wool fibers.


  • Installing insulation may require taking down current wall coverings, which could affect the size of rooms and their appearance.


  • Internal wall insulation presents a more economical option in contrast to external wall insulation.

Cavity Wall insulation is specifically intended for properties characterized by the presence of a cavity wall construction, which consists of two separate layers of walls with a gap or space existing between them.

  • Drilling of Holes: The process starts by drilling holes in the walls to facilitate the injection of cavity wall insulation materials.
  • Material Injection: Insulation materials, such as mineral wool or foam, are injected into the drilled holes. These materials naturally expand to fill the entire cavity space.
  • Hole Covering: After insulation injection, meticulous attention is given to covering access holes with plaster or similar material, ensuring the property’s aesthetic integrity.
  • Heating Efficiency: Cavity wall insulation significantly improves heating efficiency, leading to long-term reductions in energy bills.
  • Quick Installation: The installation of cavity wall insulation is typically swift, causing minimal disruption to both homeowners and tenants.
  • Minimal Disruption: Thanks to its efficiency, cavity wall insulation offers a convenient option for energy-efficient home upgrades, with minimal disturbance during installation.

Solid wall insulating, is specifically intended for older or solid-wall properties, entailing the application of insulation to the exterior of the building.

  • Structures built before 1920 usually do not have wall cavities, making them suitable for solid wall insulation.
  • Solid wall insulation provides flexibility in application, including options like external cladding, rendering, or installing insulation boards, ensuring adaptable implementation.
  • This method significantly improves energy efficiency and thermal regulation in solid wall properties, enhancing comfort for residents.
  • Solid wall insulation maintains interior living spaces and preserves the aesthetic appeal of the property, ensuring both functionality and visual attractiveness.
  • However, it’s essential to consider that solid wall insulation often comes with higher costs compared to internal insulation methods. Homeowners should carefully plan their finances before proceeding with this upgrade.

How Does Internal Wall Insulation Work?

What Are The
Advantages and Disadvantages

Of Internal Wall Insulation?

Advantages of internal wall insulation

  • Ideal for solid wall properties
  • Boosts energy efficiency
  • Provides enhanced warmth and comfort
  • Lowers carbon footprint
  • Elevates property value
  • Assists in financial support by decreasing energy requirements

Disadvantages of internal wall insulation

  • Reduction in room space
  • Disruption during installation
  • Potential costliness if ineligible for free insulation grant
  • Increased maintenance expenses if insulation is improperly installed
  • Risk of dampness and mold growth

Note: Please be aware that approval for any interior wall insulation grant or home improvement funding necessitates management by an authorized installer, like Envirohomes Renewables, within the parameters of the designated scheme, such as the ECO4 scheme.


If your household’s income is low or you receive benefits, you have a high likelihood of qualifying for complete funding for insulation through the ECO4 scheme. This financial support aims to enhance your home’s energy efficiency, resulting in decreased heating costs. It’s worth noting that eligibility isn’t solely based on receiving benefits; you may still be eligible for a government insulation grant even if you don’t receive benefits.

If your house was constructed within the last two decades, chances are the walls are already insulated, along with other energy-saving measures in place.

To verify this, consider reaching out to certified installers for a borescope inspection. This involves creating a small opening in the exterior wall to ascertain whether it contains insulation or not.

In addition to wall insulation, there are various methods to decrease your energy bills.

These strategies encompass turning off unused lights, adjusting the thermostat by 1 or 2 degrees, wearing warmer clothing indoors, transitioning to energy-efficient appliances, and limiting shower duration to conserve hot water, among others.

The Energy Saving Trust in Hamilton extends services akin to those available across the UK, offering guidance, insights, and assistance to individuals, businesses, and organizations throughout Scotland. Their aim is to facilitate energy consumption reduction, decrease energy costs, and mitigate carbon emissions.

With significant heat loss through uninsulated walls, proper insulation is crucial for energy efficiency and reducing carbon emissions.


Our team of internal wall insulation specialists in Hamilton brings a wealth of expertise and experience to every project. With extensive training and industry certifications, such as the prestigious PAS 2030 accreditation, we ensure that each job meets rigorous standards, instilling trust and reliability in our services.

Securing a complimentary insulation grant in Scotland and the UK is a seamless process, thanks to various tailored schemes designed to meet homeowners’ needs. Among these, the Energy Company Obligation 4 (ECO4) scheme stands out as a prominent and accessible program.

Backed by the government, the ECO4 scheme represents a comprehensive initiative aimed at modernizing heating systems to combat carbon emissions and alleviate fuel poverty. Specifically targeting the enhancement of heating systems in the least energy-efficient homes across Scotland and the wider UK, its primary objective is to improve overall energy efficiency.

Operating until March 2026, the ECO4 scheme prioritizes advancements in energy efficiency. Through partnerships with energy suppliers and local authorities, eligible households are identified and provided with essential support and resources to facilitate upgrades to their residences.

Get In Touch

Copyright © Envirohomes Renewables Limited.
Registered office address: 12 Somerset Place, Glasgow, Scotland, G3 7JT.
Company No: SC708370. VAT No:396823742