FREE Internal
Wall Insulation


Free Internal Wall Insulation Dundee

Envirohomes Renewables stands out as Dundee’s leading experts in internal wall insulation, committed to making homes more energy-efficient and reducing energy bills.

As a prominent provider of renewable energy solutions in Scotland, we prioritize internal wall insulation alongside other home renewable services, particularly focusing on low-income households eligible for fully funded insulation through the Government’s ECO 4 scheme.

Our team of internal wall insulation installers holds industry accreditations like PAS 2030, ensuring top-notch standards in every project.

Accessing free insulation grants in Scotland and the UK is straightforward, with initiatives like the Energy Company Obligation 4 (ECO4) scheme playing a significant role.

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

internal insulation

Who Is Eligible
For The Internal Wall Insulation Grant?

Envirohomes Renewables assists eligible individuals in securing and installing home improvement upgrades through the ECO4 scheme, targeting low-income and vulnerable households in line with government objectives to alleviate fuel poverty and achieve carbon neutrality by 2050.
Here are the criteria needed to be eligible for this grant

ECO Scheme grant eligibility

  • Individuals earning less than £19,720 annually.


  • Homeowners, private tenants, or recipients of social housing benefits.


  • Individuals receiving specific 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 involves the application of insulation materials, typically ranging from 60 mm to 100 mm in thickness, onto the interior surfaces of external walls within a property. This process serves the primary purpose of minimizing heat loss and enhancing energy efficiency within the building.

This method, known for its cost-effectiveness, commonly utilizes materials such as rigid insulation boards or mineral wool fibers. It provides an effective solution, especially for properties lacking cavity walls or facing limitations where external insulation may not be a feasible option due to architectural constraints or other considerations.

By bolstering thermal resistance from within, internal wall insulation helps create a more comfortable and energy-efficient indoor environment, contributing to reduced heating costs and overall sustainability.

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 specifically tailored for properties characterized by solid walls, with a primary emphasis on enhancing the insulation of the interior walls within the structure.

  • Insulation materials for internal wall insulation typically range from 60 mm to 100 mm in thickness, commonly available in the form of rigid insulation boards or mineral wool fibers.
  • Installation of internal insulation may require the removal of existing wall coverings to accommodate the insulation materials effectively.
  • Internal wall insulation visibly impacts the interior of the property, potentially altering the size of rooms and influencing the overall aesthetic.
  • Compared to external wall insulation, internal wall insulation generally incurs lower installation costs, making it a cost-effective option for enhancing energy efficiency in residential properties.

Cavity Wall insulation stands as a tailored approach crafted explicitly for properties featuring cavity walls, distinguished by their unique dual-layered structure comprising an exterior and interior wall separated by a hollow space. The primary objective of cavity wall insulation remains centered on elevating the warmth retention within residential spaces while concurrently promoting energy conservation.

  • Drilling holes into the outer layer of cavity walls to access the gap.


  • Injecting insulation materials such as mineral wool or foam into these holes to fill the cavities effectively.


  • Concealing the drilled holes with plaster or a similar material to restore the aesthetic appearance of the walls.

Solid wall insulating is a specialized technique tailored for older constructions or properties devoid of a cavity wall configuration.

  • Older homes constructed before 1920 often have solid walls, necessitating specialized insulation solutions to improve energy efficiency.
  • Solid wall insulation offers versatile application methods, including external cladding, rendering (plastering), or insulation boards, allowing seamless integration with the existing structure.
  • This approach effectively enhances energy efficiency and regulates thermal conditions within solid wall properties, ensuring a comfortable indoor environment.
  • The result maintains the integrity of interior living spaces and aesthetic appeal without compromising functionality.
  • It’s important to note that solid wall insulation typically involves higher upfront costs compared to internal insulation methods, but it provides long-term benefits in energy savings and comfort.

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


  • Improved energy efficiency and comfort


  • Reduced carbon footprint and increased property value


  • Financial support through reduced energy needs

Disadvantages of internal wall insulation

  • Reduction in room space and installation disruption.


  • Potential costs for ineligible applicants.


  • Increased maintenance if not installed correctly.


  • Risk of dampness/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).


Individuals with low incomes or those receiving benefits can access full funding through the ECO4 scheme, even if they don’t receive benefits directly, helping to make homes more energy-efficient and reduce heating expenses.

Homes built in the past two decades likely already have insulation. Certified installers can perform borescope inspections to confirm insulation presence or absence.

Aside from insulation, energy bills can be reduced through various measures like optimizing lighting usage, adjusting thermostats, using energy-efficient appliances, and conserving hot water.

The Energy Saving Trust offers advice, information, and support to individuals, businesses, and organizations in Dundee to reduce energy consumption, lower bills, and cut carbon emissions.

Wall insulation is crucial, as significant heat loss can occur through uninsulated walls, emphasizing the importance of proper insulation for energy efficiency.

In Dundee, our team stands out for its exceptional proficiency in internal wall insulation, backed by extensive experience and prestigious certifications like the renowned PAS 2030 accreditation. This accreditation ensures that every project we undertake meets the highest standards, guaranteeing reliability and excellence in our services.

Accessing a complimentary insulation grant in Scotland and across the UK is a simple process, facilitated by various tailored schemes available to homeowners. Among these initiatives, the Energy Company Obligation 4 (ECO4) scheme shines for its accessibility and effectiveness.

Endorsed by the government, the ECO4 scheme represents a comprehensive program in the UK aimed at modernizing heating systems, combating carbon emissions, and addressing fuel poverty. With a specific focus on enhancing 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 continue until March 2026, the ECO4 scheme places significant emphasis on improving energy efficiency. Through collaboration with energy suppliers and local authorities, eligible households are identified and provided with essential support and resources to enhance their properties.

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