FREE Internal
Wall Insulation


Free Internal Wall Insulation Perth

EnviroHomes Renewables is your go-to expert in Perth, for state-of-the-art internal wall insulation solutions. At EnviroHomes Renewables, we’re dedicated to transforming the landscape of renewable home services in Scotland, recognizing the pivotal role internal wall insulation plays in enhancing energy efficiency and slashing energy costs.

Our primary focus revolves around delivering fully funded internal wall insulation services, precisely tailored to cater to low-income households receiving benefits across Perth and UK. Through initiatives like the Government’s ECO 4 scheme, we extend this fully funded service to eligible households, ensuring fair access to energy-saving solutions throughout Perthshire and beyond.

With a team of highly skilled internal wall insulation experts boasting prestigious industry accreditations, including the renowned PAS 2030 certification, we assure unparalleled quality and professionalism in every project we undertake.

Securing a free insulation grant in Perth and across the UK has never been simpler, thanks to initiatives like the Energy Company Obligation 4 (ECO4) scheme. This government-backed program is committed to upgrading heating systems, cutting carbon emissions, tackling fuel poverty, and modernizing home heating infrastructure across Scotland and the wider UK.

Running until March 2026, the ECO4 scheme places significant emphasis on promoting energy efficiency. Through collaboration with energy suppliers and local authorities, it identifies and supports eligible households in Perth, paving the way for a more sustainable and energy-conscious future.

internal insulation

Who Is Eligible
For The Internal Wall Insulation Grant?

Envirohomes Renewables is instrumental in facilitating eligible individuals to engage in diverse home improvement endeavors under the ECO4 initiative. In line with governmental aims to combat fuel poverty and attain carbon neutrality by 2050, this initiative endeavors to enhance accessibility to sustainable living for everyone.
Here are the criteria needed to be eligible for this grant

ECO Scheme grant eligibility

  • Individuals earning below £19,720 annually.


  • Home occupants, whether owning, renting, or residing in social housing.


  • Recipients of designated benefits like Child Benefit, Income Support, among others.


  • Those aged 60 and above benefiting from Pension Credit.


  • Residences with an Energy Performance Certificate (EPC) rating of D or below.

What Is Internal Wall Insulation?

Internal wall insulation has emerged as a highly effective strategy for improving energy efficiency in buildings. This method involves adding insulation materials, such as rigid boards or mineral wool fibers, to the inner surfaces of exterior walls, typically ranging from 60 mm to 100 mm in thickness.

By incorporating an additional thermal barrier within the building structure, internal wall insulation significantly reduces heat loss. As a result, it leads to substantial improvements in energy conservation, resulting in significant reductions in heating costs over time.

There are several advantages to internal wall insulation, particularly for buildings without cavity walls or where installing cavity wall insulation is not feasible. Additionally, this insulation method helps to enhance indoor temperature control, increasing occupants’ comfort levels. Moreover, it has the potential to extend the lifespan of the building’s heating systems, making it a valuable investment in both energy efficiency and long-term building maintenance.

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 solutions are customized specifically for properties with solid walls, focusing on bolstering insulation within the interior structure.

  • Insulation materials, typically ranging from 60 mm to 100 mm thick, often consist of rigid insulation boards or mineral wool fibers.
  • Installing this insulation may necessitate removing existing wall coverings to ensure optimal placement.
  • The enhancements are evident within the property, potentially altering room dimensions and aesthetic appearance.
  • Compared to external wall insulation, internal wall insulation generally provides a more cost-effective means of enhancing energy efficiency.

Cavity Wall insulation offers a tailored solution for homes equipped with cavities between their inner and outer walls.

  • The insulation process begins with precise drilling into the walls, allowing for the insertion of insulation materials.
  • Using either mineral wool or foam, the insulation material is injected into the drilled holes, expanding to effectively occupy the cavity space and improve insulation.
  • The filled holes are discreetly concealed using plaster or similar substances, maintaining the property’s visual appeal.
  • Cavity wall insulation significantly improves heating efficiency, resulting in substantial and long-lasting reductions in energy costs.
  • Enjoy a quick installation process that minimizes disturbances for homeowners or tenants, ensuring a smooth and hassle-free experience.
  • Cavity wall insulation provides a convenient solution with minimal disruption during installation, prioritizing homeowner comfort.

Solid Wall insulating is a tailored solution tailored for older or solid-wall structures, addressing the critical need to enhance thermal efficiency. This technique involves applying insulating materials to the outer surface of the building, creating a protective barrier against thermal dissipation and enhancing the overall energy efficiency of the structure.

  • Many older structures, particularly those built before 1920, often lack cavities within their walls, making them ideal candidates for solid wall insulation.

  • Solid wall insulation offers a range of adaptable application techniques, such as external cladding, rendering, or the use of insulation boards. These various methods cater to the unique needs of different building configurations.

  • By significantly improving energy efficiency and thermal control, solid wall insulation enhances the comfort of occupants within these structures, creating a more pleasant living environment.

  • Remarkably, solid wall insulation maintains the integrity of indoor spaces and preserves the aesthetic appeal of properties, ensuring a harmonious balance of functionality and visual attractiveness.

  • Solid wall insulation typically involves higher costs compared to internal insulation alternatives, reflecting the additional materials and labor required for exterior application.

How Does Internal Wall Insulation Work?

What Are The
Advantages and Disadvantages

Of Internal Wall Insulation?

Advantages of internal wall insulation

  • Perfect for homes with solid walls.
  • Boosted energy efficiency.
  • Increased coziness and warmth.
  • Reduced environmental impact.
  • Heightened property valuation.
  • Opens doors to financial assistance by cutting down energy usage.

Disadvantages of internal wall insulation

  • Reduction room space.
  • Disruption during the installation process.
  • Can be costly – if you do not meet the eligibility criteria for a free insulation grant.
  • Increased maintenance costs can be incurred if the insulation installed is not done correctly by trained professionals.
  • 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).


If your household has a low income or receives benefits, there’s a good chance you can receive full funding for free insulation through the ECO4 scheme. This funding can help make your home more energy-efficient, leading to reduced heating expenses. This means that even if you don’t receive benefits, you may still qualify for a government insulation grant.

If your home was built in the past 20 years, it’s likely the walls are already insulated (as well as having other energy efficiency measures). To confirm this, you can consult certified installers to perform a borescope inspection. They will make a small hole in the exterior wall to determine if the walls are empty or insulated.

Apart from wall insulations, you can reduce your energy bills in several ways.

These include switching off lights that are not in use, reducing the thermostat by 1 or 2 degrees, opting to wear jumpers/socks indoors switching to energy-efficient A-grade appliances and having shorter showers to conserve hot water usage – to name a few.

In Perth, Scotland, the Energy Saving Trust offers similar services and initiatives as it does in other parts of the UK.

It provides advice, information and support to individuals, businesses and organisations in Scotland to help them reduce energy consumption, lower energy bills and reduce carbon emissions.

Yes. Statistics show that up to 45% of heat can be lost through uninsulated solid walls, while an additional 25% of heat can be lost through an uninsulated roof.

This just goes to show how important it is to have your walls properly insulated.

In Perth, Scotland, our team of professionals is committed to delivering exceptional internal wall insulation solutions, leveraging our extensive expertise and hands-on experience. We pride ourselves on upholding the highest standards, supported by industry recognition and certifications such as PAS 2030, ensuring the flawless execution of our services and instilling confidence in our clients.

Navigating the realm of free insulation grants in Scotland and the wider UK is made simple through tailored programs designed to meet the unique needs of homeowners. One notable initiative is the Energy Company Obligation 4 (ECO4) scheme, which offers accessible options for residents.

Endorsed by governmental bodies, the ECO4 scheme represents a concerted effort to modernize heating systems, reduce carbon emissions, and address fuel poverty. Focusing on upgrading heating systems in the least energy-efficient homes in Perth and beyond, its aim is to enhance overall energy efficiency standards.

Running until March 2026, the ECO4 scheme underscores the importance of advancing energy efficiency measures. Through collaborations with energy suppliers and local authorities, eligible households in Perth receive essential support and resources to facilitate home improvements, contributing to a more sustainable future.

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