FREE Internal
Wall Insulation


Free Internal Wall Insulation Glasgow

Envirohomes Renewables stands as one of the foremost authorities on internal wall insulation in Glasgow, emphasizing its crucial role in enhancing energy efficiency and reducing utility bills.

As a leading provider of home renewable services in Scotland, we prioritize offering fully funded internal wall insulation solutions to low-income households receiving benefits, aligning with the Government’s ECO 4 scheme.

Our team of highly trained installers holds industry accreditations, including the PAS 2030 certification, ensuring top-notch standards in every project.

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

This government-backed initiative aims not only to lower carbon emissions but also to tackle fuel poverty and upgrade heating systems in inefficient homes across Scotland and the UK.

Scheduled to continue until March 2026, the scheme emphasizes energy efficiency enhancements in collaboration with energy suppliers and local authorities.

internal insulation

Who Is Eligible
For The Internal Wall Insulation Grant?

Envirohomes Renewables assists qualifying customers in acquiring and implementing a range of home improvement enhancements under the ECO4 initiative. Primarily targeting low-income and at-risk households, this scheme aligns with governmental objectives to combat fuel poverty and achieve carbon neutrality 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 recipients of social housing benefits.
    • Individuals receiving specific benefits like Child Benefit or Income Support.
    • Pensioners aged 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 is a strategic approach to enhancing energy efficiency within buildings. It involves the addition of insulation materials, typically ranging between 60 mm to 100 mm in thickness, onto the interior surfaces of external walls.

This method serves as a cost-effective alternative to external wall insulation, making it an attractive option for properties lacking cavity walls or where cavity wall insulation isn’t a feasible solution.

By bolstering thermal resistance from within, internal wall insulation helps minimize heat loss, thus contributing to lower energy consumption and reduced utility costs over time.

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 solution tailored for properties featuring solid walls, with a primary focus on bolstering insulation within the interior walls.

  • Insulation materials typically vary in thickness from 60 mm to 100 mm, commonly comprising rigid insulation boards or mineral wool fibers.
  • Installation often necessitates the removal of existing wall coverings to facilitate the effective placement of insulation materials.
  • Consequently, the installation process results in a visible transformation within the property’s interior, potentially impacting room dimensions and overall aesthetics.
  • Internal wall insulation presents a more cost-effective option compared to external alternatives, owing to factors such as material and labor costs. This affordability renders it an appealing choice for property owners seeking efficient insulation solutions.

Cavity Wall insulation is designed specifically for homes with a cavity wall configuration, consisting of two layers—an outer and an inner wall—separated by a gap referred to as the cavity. This insulation technique involves filling this space with insulating materials, ultimately improving the thermal performance of the property and lowering energy usage.

  • The process commences with drilling holes into the walls, enabling the injection of cavity wall insulation materials like mineral wool or foam.

  • These materials expand upon injection, effectively filling the entire cavity space and providing thorough insulation coverage.

  • After insulation injection, meticulous care is taken to cover access holes with plaster or similar materials, preserving the property’s aesthetic appeal.

  • Cavity wall insulation plays a significant role in enhancing heating efficiency and ultimately reducing energy expenditure over time.

  • The installation process for cavity wall insulation is typically swift and causes minimal disruption to homeowners and tenants, offering a convenient option for energy-efficient home enhancements.

Solid wall insulating, is custom-designed for older structures or properties without cavity walls, with the goal of improving energy efficiency by directly applying insulation materials to the exterior walls.

  • Structures constructed before 1920 typically possess solid walls without the cavities present in newer buildings, rendering them ideal candidates for solid wall insulation.
  • Solid wall insulation offers various application methods, such as external cladding, rendering (plastering), or installing insulation boards, allowing for adaptable implementation strategies.
  • This approach proves highly effective in enhancing energy efficiency and thermal regulation within solid wall properties, ultimately contributing to increased comfort for occupants.
  • The incorporation of solid wall insulation preserves interior living spaces and maintains the property’s aesthetic appeal, ensuring both functionality and visual charm.
  • Solid wall insulation often involves higher costs compared to other options. 

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 and increased property value.


  • Financial support through reduced energy needs.

Disadvantages of internal wall insulation

  • Reduced room space and installation disruption.


  • Potential cost for ineligible applicants.


  • Increased maintenance costs if not installed correctly.


  • Risk of dampness/mould 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).


While benefits recipients are prioritized, households with low incomes may still qualify for full funding through schemes like ECO4, regardless of benefit status.

Certified installers can perform a borescope inspection to determine cavity wall insulation presence, particularly in homes built within the last 20 years.

Aside from insulation, energy-saving practices such as reducing thermostat settings and using energy-efficient appliances contribute to lower energy bills.

The Energy Saving Trust offers guidance and support in Glasgow, aiding individuals and organizations in reducing energy consumption and carbon emissions.

With significant heat loss potential through uninsulated walls, proper insulation is crucial for energy efficiency and comfort in homes.

Our dedicated team of professionals specializes in internal wall insulation projects in Glasgow, bringing a wealth of expertise to each endeavor. With extensive training and industry certifications such as the esteemed PAS 2030 accreditation, we uphold rigorous standards in every job, ensuring reliability and excellence in our services.

Securing a complimentary insulation grant in Scotland and the UK is a streamlined process, facilitated by a range of tailored schemes tailored to homeowners’ requirements. Among these, the Energy Company Obligation 4 (ECO4) scheme stands out as a notable and accessible program.

Backed by governmental support, the ECO4 scheme represents a comprehensive initiative in the UK aimed at modernizing heating systems to combat carbon emissions and alleviate fuel poverty. Its primary focus lies in upgrading heating systems in the least energy-efficient homes across Scotland and the wider UK, with the overarching objective of improving overall energy efficiency.

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

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