Households across the UK could reduce their annual energy expenditure by hundreds of pounds this winter through a single home improvement, according to new guidance. The Energy Saving Trust (EST) has outlined practical measures to enhance domestic warmth and efficiency, with a particular focus on wall insulation.
Unlocking Major Savings: Cavity vs. Solid Walls
The potential savings are significant and depend largely on the construction period of your property. Homes built after the 1920s typically feature cavity walls – two layers of masonry with a gap between them. The outer layer is usually brick, with an inner layer of brick or concrete block.
Insulating this cavity can prevent heat from escaping, leading to substantial financial benefits. The EST states that cavity wall insulation can save up to £240 per year on energy bills. For older properties constructed before 1920, which are more likely to have solid walls made of brick or stone, the savings from installing insulation are even greater, at around £330 annually.
Is Your Home Suitable for Cavity Wall Insulation?
Before proceeding, it is crucial to determine your wall type and assess suitability. The Energy Saving Trust advises that while cavity wall insulation is appropriate for many homes, certain conditions may rule it out.
The EST cautions that insulation might not be suitable if your property:
- Is exposed to extreme weather or regular flooding.
- Is in a poor state of repair.
- Has narrow cavities of less than 50mm (common in some pre-1920s homes).
- Faces a risk of rooms overheating.
"These risks should be assessed by your installer or buildings professional," the Trust emphasises. It is also vital that any necessary external repairs are completed before insulation is added.
Benefits Beyond Bill Reduction
The advantages of properly installed cavity wall insulation extend beyond direct cost savings. The EST highlights that it reduces heat loss, lowers the risk of condensation forming on internal walls, and helps to minimise draughts, creating a more comfortable and healthier living environment.
With energy prices remaining a primary concern for families, this guidance from the Energy Saving Trust offers a clear, actionable path to making homes more affordable to heat during the colder months. Identifying your wall type is the essential first step toward unlocking these annual savings.
