What is Internal Wall Insulation

Internal wall insulation refers to the application of insulation material to the interior face of external walls to improve a building’s thermal performance. This method is particularly suitable for solid-wall homes, typically built before the 20th century, which lack the cavity walls found in more modern buildings. The main goal is to reduce heat loss, thereby increasing energy efficiency and reducing heating costs.

There are several methods for installing internal wall insulation, with the most common being the construction of a new stud wall to which insulation is added. However, this process can be disruptive, requiring the temporary removal of items like switches and radiators. It’s also important to ensure that the installation is airtight to avoid issues such as damp and condensation.

The cost of internal wall insulation can vary, but it generally ranges between £40 and £50 per square meter, potentially reaching over £100 per square meter if a new stud wall is constructed.

Why should I get internal wall insulation?

Internal wall insulation offers several benefits, making it a worthwhile investment for homeowners. Some of the key advantages include

How much can internal wall insulation save?

The average cost of internal wall insulation is between £40 and £50 per square meter, but it can reach over £100 per square meter, depending on the size and type of the property. The cost can vary from £4,000 to £13,000 for the entire project, with up to 60% of the cost being attributed to labor. However, homeowners could be eligible for free internal wall insulation through government schemes, help cover the cost of making energy efficiency improvements in the home.

Internal wall insulation can lead to significant savings on heating bills. According to the Energy Saving Trust, insulating the walls of a detached house could save an average of £690 annually on energy costs. 

For a semi-detached house, the savings could be around £395 per year, and for a mid-terrace house, about £235 per year. These savings also contribute to reducing carbon emissions, making it a beneficial choice for both your wallet and the environment. 

The actual savings will vary based on your property and usage, but homeowners can save up to 40% on their heating bills with internal wall insulation.

Internal wall insulation not only reduces heating costs but also can improve the comfort of a home by maintaining more consistent indoor temperatures and reducing drafts.