FREE Internal
Wall Insulation


Free Internal Wall Insulation Edinburgh

Envirohomes Renewables is renowned as the go-to expert for internal wall insulation in Edinburgh, dedicated to improving energy efficiency and reducing energy costs for homeowners across the city.

As a leading provider of renewable home services in Scotland’s capital, we recognize the pivotal role internal wall insulation plays in enhancing residential energy performance.

Our primary focus is on providing fully funded internal wall insulation services to low-income households in Edinburgh through the Government’s ECO 4 scheme. With a commitment to excellence, our team of internal wall insulation installers holds industry accreditations, including the esteemed PAS 2030 certification, ensuring top-notch standards in every project we undertake.

Securing a free insulation grant in Edinburgh is facilitated through various schemes, with the Energy Company Obligation 4 (ECO4) scheme being one of the largest initiatives.

This government-backed program aims to upgrade heating systems, reduce carbon emissions, alleviate fuel poverty, and enhance the energy efficiency of homes across Edinburgh and the UK until March 2026.

internal insulation

Who Is Eligible
For The Internal Wall Insulation Grant?

Envirohomes Renewables enables qualifying individuals to access and implement home improvement enhancements through the ECO 4 initiative, in line with government efforts to address fuel poverty and reach carbon neutrality objectives by 2050.
Here are the criteria needed to be eligible for this grant

ECO Scheme grant eligibility

  • Individuals with an income below £19,720 per annum.


  • Homeowners, private tenants, or beneficiaries of social housing.


  • Recipients of certain benefits such as Child Benefit, Income Support, etc.


  • Pensioners (over 60) receiving Pension Credit Benefits.


  • Homes with an Energy Performance Certificate (EPC) rating of D or lower.

What Is Internal Wall Insulation?

Internal wall insulation presents a highly cost-effective strategy for tackling heat loss within properties.

This method involves the incorporation of insulation materials, typically ranging from 60 mm to 100 mm in thickness, onto the inner surfaces of external walls. Commonly employed materials include rigid insulation boards made from plasterboard or mineral wool fibers.

By enhancing the thermal performance of these walls, internal wall insulation helps to create a more comfortable and energy-efficient indoor environment, thereby contributing to reduced heating costs and enhanced sustainability for homeowners.

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 crafted for properties featuring solid walls, with a primary objective of insulating the inner walls of the structure.

  • Internal insulation commonly utilizes insulation materials ranging from 60 mm to 100 mm thick, such as rigid insulation boards or mineral wool fibers.
  • Installation of internal insulation may require the removal of existing wall coverings to accommodate the insulation materials.
  • The impact of internal insulation is visible within the property’s interior, potentially altering room sizes and aesthetic appeal.
  • Compared to external wall insulation, internal wall insulation generally incurs lower installation costs.

Cavity Wall insulation serves as a specialized solution meticulously designed for properties equipped with cavity walls, which feature a distinctive dual-layer structure comprising an outer and inner wall separated by a cavity. The primary purpose of cavity wall insulation is to enhance the warmth within homes while also effectively conserving energy.

  • Establishing access points by drilling holes into the outer layer of cavity walls.
  • Injecting insulation materials such as mineral wool or foam into these drilled holes to fill the cavities effectively.
  • Concealing the drilled openings with plaster or a similar material to restore the aesthetic appearance of the walls.

Solid wall insulating is a targeted solution designed for older buildings or properties without a cavity wall construction. It is meticulously formulated to control indoor temperatures, improve comfort, and reduce energy consumption, making it particularly suitable for preserving the unique character of historic structures.

  • Older homes built pre-1920 often have solid walls, requiring specialized insulation.
  • Solid wall insulation offers various methods like external cladding or insulation boards.
  • It enhances energy efficiency and thermal regulation, ensuring comfort indoors.
  • The final result preserves interior aesthetics without compromising functionality.
  • Solid wall insulation typically involves higher upfront costs.

How Does Internal Wall Insulation Work?

What Are The
Advantages and Disadvantages

Of Internal Wall Insulation?

Advantages of internal wall insulation

  • Suitable for solid wall properties.
  • Enhanced energy efficiency and comfort.
  • Reduced carbon footprint.
  • Increased property value.
  • Financial support through reduced energy needs.

Disadvantages of internal wall insulation

  • Reduction in room space.
  • Disruption during installation.
  • Potential costs for ineligible applicants.
  • Maintenance concerns if installation is improper.
  • Risk of dampness or mold growth.

Note: For any interior wall insulation grant or home improvement funding to be approved, it must be managed by an approved installer (such as Envirohomes Renewables) by the specific scheme (such as the ECO4 scheme).


Even if you don’t receive benefits, you may still qualify for a government insulation grant in Edinburgh if your household has a low income.

Funding through schemes like ECO4 can significantly improve your home’s energy efficiency and reduce heating expenses.

Homes built in the last 20 years in Edinburgh likely have cavity wall insulation.

Certified installers can perform borescope inspections to confirm insulation presence or absence.

Besides wall insulation, energy bills can be reduced through various measures such as efficient appliance usage, temperature adjustments, and water conservation practices.

The Energy Saving Trust offers advice and support in Edinburgh to reduce energy consumption, lower bills, and cut carbon emissions.

Yes, as a significant portion of heat loss occurs through uninsulated walls, emphasizing the importance of proper insulation for energy efficiency.

In Edinburgh, our team specializes in internal wall insulation, boasting extensive experience and industry-leading certifications like the prestigious PAS 2030 accreditation. This guarantees that each project we undertake meets the highest standards, ensuring reliability and excellence in our services.

Securing a complimentary insulation grant in Scotland and throughout the UK is a straightforward process, facilitated by various tailored schemes accessible to homeowners. Among these, the Energy Company Obligation 4 (ECO4) scheme is prominent for its accessibility and effectiveness.

Endorsed by the government, the ECO4 scheme represents a comprehensive UK program aimed at modernizing heating systems, reducing carbon emissions, and combating fuel poverty. With a specific focus on improving the energy efficiency of the least efficient homes across Scotland and the UK, its objective is to upgrade heating systems and overall energy performance.

Scheduled to run until March 2026, the ECO4 scheme places significant emphasis on enhancing energy efficiency. Through collaboration with energy suppliers and local authorities, eligible households are identified and provided with crucial support and resources to improve their properties.

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Registered office address: 12 Somerset Place, Glasgow, Scotland, G3 7JT.
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