FREE Internal
Wall Insulation


Free Internal Wall Insulation Shetland

Envirohomes Renewables is widely recognized as the leading expert in internal wall insulation in Shetland, committed to enhancing energy efficiency and minimizing energy costs for homeowners throughout the region. As a premier provider of renewable home services in Shetland, we understand the vital role that internal wall insulation plays in improving residential energy performance.

Our primary objective is to offer fully funded internal wall insulation services to low-income households in Shetland through the Government’s ECO 4 scheme.

With a dedication to excellence, our team of internal wall insulation installers holds industry accreditations, including the prestigious PAS 2030 certification, ensuring exceptional standards in every project we undertake.

Accessing a free insulation grant in Shetland 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 throughout Shetland and the wider UK until March 2026.

internal insulation

Who Is Eligible
For The Internal Wall Insulation Grant?

Envirohomes Renewables facilitates eligible individuals in accessing and implementing home improvement upgrades under the ECO 4 initiative. This aligns with government initiatives aimed at tackling fuel poverty and achieving carbon neutrality goals 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 offers a highly efficient solution for addressing heat loss in buildings at a reasonable cost.

This technique involves adding insulation materials, typically ranging from 60 mm to 100 mm thick, to the inner surfaces of external walls. Common materials used include rigid insulation boards made from plasterboard or mineral wool fibers.

By improving the thermal performance of these walls, internal wall insulation creates a more comfortable and energy-efficient indoor environment. This, in turn, helps to lower heating expenses and promotes 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 designed specifically for properties with solid walls, aiming to insulate the inner walls effectively.

  • Internal insulation is tailored for properties with solid walls, focusing on insulating the inner walls.
  • Common materials used for internal insulation include rigid insulation boards or mineral wool fibers, typically ranging from 60 mm to 100 mm thick.
  • Installation may necessitate removing existing wall coverings to accommodate the insulation materials.
  • The impact of internal insulation can be seen in the property’s interior, potentially altering room sizes and aesthetic appeal.
  • Compared to external wall insulation, internal wall insulation typically incurs lower installation costs.

Cavity Wall insulation is a specialized solution tailored for properties with dual-layer cavity walls, aiming to improve warmth and energy efficiency.

  • Drilling holes into the outer wall to create access points


  • Injecting insulation materials like mineral wool or foam into the cavities


  • Concealing the openings with plaster to maintain aesthetic appeal

Solid wall insulating serves as a targeted solution specifically designed for older buildings or properties lacking cavity wall construction.

  • Solid wall insulation is targeted for older buildings or properties without cavity wall construction.
  • Specialized methods like external cladding or insulation boards are employed.
  • It enhances energy efficiency and thermal regulation.
  • Designed to preserve the unique character of historic structures.
  • Maintains interior aesthetics without compromising functionality.
  • 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

  • Designed for solid wall properties.
  • Improves energy efficiency and comfort.
  • Reduces carbon footprint.
  • Enhances property value.
  • Provides financial support through reduced energy needs.

Disadvantages of internal wall insulation

  • Reduction in room space may occur.
  • Disruption is possible during installation.
  • Potential costs may arise for ineligible applicants.
  • Maintenance concerns may arise if installation is improper.
  • There is a 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).


If your household has a low income or receives benefits, you may qualify for full funding for insulation through the ECO4 scheme, reducing heating expenses. Even without benefits, you may still be eligible for a grant.

Homes built in the past 20 years likely have insulated walls. To confirm, certified installers can perform a borescope inspection, making a small hole in the exterior wall to check insulation.

Beyond wall insulation, strategies include turning off unused lights, lowering the thermostat, wearing warmer clothing indoors, using energy-efficient appliances, and conserving hot water during showers.

In Shetland, Scotland, the Energy Saving Trust offers advice, information, and support to individuals, businesses, and organizations to reduce energy consumption, lower bills, and decrease carbon emissions.

Yes. Uninsulated solid walls can lose up to 45% of heat, while uninsulated roofs can lose an additional 25%, highlighting the importance of proper wall insulation.

In Shetland, our team specializes in internal wall insulation, backed by extensive experience and industry-leading certifications, including the prestigious PAS 2030 accreditation. This ensures that every project we undertake meets the highest standards, guaranteeing reliability and excellence in our services.

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

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

Running until March 2026, the ECO4 scheme prioritizes enhancing energy efficiency. Through collaboration with energy suppliers and local authorities, eligible households in Shetland and beyond 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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