Internal Wall Insulation UK

Internal Wall Insulation (IWI), also known as Internal Insulation or Internal Solid Wall Insulation, is a method used to improve the thermal performance of existing buildings by adding insulation to the interior surfaces of external walls. The primary purpose of internal wall insulation is to reduce heat loss through the walls, thus increasing energy efficiency and helping to maintain a comfortable and consistent indoor temperature.

The three most common types of cavity wall insulation used are: Blown mineral fibre. Polystyrene beads or granules. Urea formaldehyde foam.

Edan Homes insulation products are suitable for use as internal wall insulation, for both new build and refurbishment projects. We offer one of the thinnest solutions available as a result of their superior thermal performance.

The Process of Internal Wall Insulation

The process involves fixing insulation materials, such as rigid foam boards or mineral wool, directly onto the inner surface of the external walls. These materials have good thermal properties and create a barrier that prevents heat from escaping through the walls. By reducing heat loss, internal wall insulation can lead to significant energy savings and lower heating costs.

Internal wall insulation can be suitable for properties that cannot have external insulation installed due to architectural constraints, planning restrictions, or aesthetic considerations. It is commonly used in older or historic buildings with solid walls, as adding external insulation may not be feasible or might impact the building’s appearance.

How does internal wall insulation fitted?

internal wall insulation installation uk

Preparation and Assessment: Before beginning the installation, a thorough assessment of the building is necessary. This assessment includes identifying the type of walls (solid or cavity), determining the appropriate insulation material, and checking for any existing issues like dampness or mold.

Surface Preparation: The interior walls must be clean, dry, and free from any loose materials or debris. Any existing dampness or leaks should be addressed before proceeding with the insulation.

Insulation Material Selection: Choose the appropriate insulation material based on the building’s requirements and the available space for installation. Common materials used for internal wall insulation include rigid foam boards, mineral wool, and reflective foil insulation.

Fixing the Insulation: The selected insulation material is then fixed directly onto the interior surface of the external walls. This can be done using adhesive, mechanical fixings, or a combination of both. The insulation boards are usually cut to fit snugly between wall features like windows, doors, and corners.

Insulating Boards: For rigid foam boards, these are typically fixed using a strong adhesive applied to the back of the boards. They are then pressed against the wall and held in place until the adhesive sets. Mechanical fixings, such as plastic wall plugs and screws, may also be used to ensure secure attachment.

Mineral Wool Insulation: For mineral wool or other flexible insulation materials, they are usually fixed using battens (wooden or metal strips) attached to the wall. The insulation material is then placed between the battens, and the finish is applied over the insulation.

Sealing and Vapour Control: Proper sealing of joints and edges is essential to minimize air leakage and maintain the insulation’s effectiveness. Additionally, a vapor control layer may be required to prevent moisture from migrating through the insulation and causing condensation issues.

Reinstating Fixtures: After the insulation is installed, electrical outlets, switches, and other fixtures may need to be repositioned on the insulated wall surface to align with the new thickness.

Internal Finish: Once the insulation is securely in place, a new internal finish is applied over it. This can involve plastering, dry-lining, or other wall coverings, depending on the desired appearance.

Skirting and Architraves: Finally, skirting boards and architraves are reinstalled to cover any gaps and provide a neat finish.

It’s crucial to ensure that the installation is carried out correctly, and any potential issues like condensation and moisture ingress are addressed. Consulting a professional and experienced contractor for internal wall insulation is recommended to ensure a successful and effective installation while minimizing any potential risks to the building’s structure and indoor environment.

Why do we need internal wall insulation?

Internal wall insulation is needed for several important reasons:
  • Improved Energy Efficiency
  • Enhanced Thermal Comfort
  • Reduced Condensation and Dampness
  • Suitable for Older Buildings
  • Preservation of Building’s Exterior
  • No Impact on External Spaces
  • Flexibility in Insulation Material
  • Quick Installation
  • Cost-Effective Retrofitting

What type of insulation do you install?

When we install insulation in internal walls, we use Earthwool glass mineral wool. This sustainable product has high performance environmental credentials.

The basic raw materials are silica sand and recycled glass bottles.

Can I get a grant to cover the cost?

Funding may be available from the government’s Energy Company Obligation (ECO4) scheme. This is an obligation on energy companies to provide funding for energy-saving measures, by the government, to upgrade the energy efficiency of the country’s worst-performing housing and to provide fuel poverty support. ECO4 funding is available for households with low incomes, in receipt of qualifying benefits, and with a low property EPC rating. This is part of a wider government strategy to reduce carbon emissions, tackle fuel poverty and help householders save money on their energy bills.

How much money will internal wall insulation save me?

The amount of money that internal wall insulation can save you will depend on various factors, including the current insulation levels of your property, the type and quality of the insulation installed, the local climate, and your heating habits. While it is challenging to provide an exact figure without specific information about your property and energy consumption, internal wall insulation can lead to significant cost savings over time.

As well as helping to reduce your energy bills! The installation process is quick and easy with as little disruption to you and your home as possible. There is no need to remove any part of the existing wall or structure and the process is finished off using a plaster skim coat or dry lining technique.

An alternative to external wall insulation, is internal wall insulation. Internal wall insulation consists of thermally engineered composite studs and insulation slabs and this will also directly retain heat within your home and lead to a significant reduction in energy bills whilst also increase a value of a property.

The government’s eco funding grant is a great way to help homeowners who are receiving certain government benefits to make their home more energy efficient which in turn can help save them money on their energy bills. You can find out if you qualify below or for more information about internal wall insulation get in touch with one of the Eco Homes team here.

We can help you claim funding to save on your home bills

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