Cavity Wall Insulation

Say Goodbye to Drafts and High Bills

Many cavity walls are insulated from the outside by injecting materials. Specialists drill holes, insert insulation (commonly mineral wool or polystyrene beads), and seal them. To insulate, a registered installer drills small holes of depth 18-25mm on the exterior walls. Using special equipment, they blow insulation into the cavity and fill the holes inconspicuously. Filling cavity walls isn’t a DIY task; hire a registered installer. The job takes about two hours for an average house with easily accessible walls, causing minimal disruption.

Is cavity wall insulation suitable for your home?

If your house is relatively new, it probably already has insulation. To check, consider these steps:

Inspection

Ask a registered installer for this. They'll drill a small hole in your external wall to inspect whether the walls are hollow or filled.

Building Control Department

Check with your local authority's building control department for information.

Understand the Cavity Wall

A cavity wall consists of two layers separated by a gap called the cavity. The outer layer is typically made of bricks, while the inner layer can be either bricks or concrete blocks. Houses built after the 1920s usually have this structure known as cavity walls, whereas older homes, predating the 1920s, are more likely to have solid walls—a single, thick layer made of bricks or stone. To identify your wall type, examine the external brickwork. Cavity walls display a uniform brick pattern with all bricks laid lengthways.

Costs and Savings

Installation costs vary by home size. Whether a spacious house or a compact flat, you can recoup costs within five years through annual energy bill savings. Mitigate costs by coordinating work with other home improvements or focusing on specific areas rather than the entire house.

Important Notices

Your home is suitable for standard cavity wall insulation if it meets these criteria:

External walls are unfilled cavity walls.
Cavity is at least 50mm wide and clear of rubble.
Masonry or brickwork is in good condition.
Walls aren’t exposed to heavy rain.
Home isn’t at risk of flooding.
An installer will survey your house to confirm suitability. If suitable, insulation can be done using mineral wool or polystyrene beads.

For homes with narrow cavities, exposed locations, or flood risks, polyurethane foam might be suitable but is more expensive. A specialist will assess this.
Fix any internal damp issues before insulating.
If your home’s walls connect to another house, a cavity barrier will prevent impact on neighbors.
Flat insulation requires agreement from all residents; individual flat insulation is not feasible.

Here's how Cavity Wall Insulation with Green Energy Efficiency transforms your home

Lower Energy Bills: Save up to £515 annually on heating—it’s like getting a free holiday every year!
Warmer, Cosier Home: Enjoy consistent warmth and comfort throughout the year.
Enhanced EPC Rating: Improve your home’s energy rating, making it more appealing to buyers and potentially increasing its value.
Eco-Friendly: Cut your carbon footprint and contribute to a greener planet.

FAQ

Expertise You Can Trust:

Our team comprises skilled professionals with extensive experience in Cavity Wall Insulation. We adhere to the latest industry standards and guidelines to provide you with the best service.

Hassle-Free Process:

From assessment to installation, we ensure a smooth and hassle-free experience for our customers. Our experts will guide you through the entire process, addressing any queries you may have.

Customer Satisfaction:

From assessment to installation, we ensure a smooth and hassle-free experience for our customers. Our experts will guide you through the entire process, addressing any queries you may have.