Cavity Wall Insulation
For sustainable, cosy homes
Is your home cold because it’s losing heat through the walls? Cavity wall insulation is one of the most common and effective ways to remedy that problem.
Most homes built between the 1920s and 1990s have a gap between the inner and outer walls, so filling it with insulation prevents heat from escaping, leading to a warmer, more comfortable environment and significant savings on your energy bills.
How does cavity wall insulation work?
Part of the heat pump will live outside of your house. This part often looks like a slightly larger air conditioning unit that you might see on buildings when you go abroad. They typically sit on the ground and will often be attached to one of your exterior walls.
Insulating your cavity walls is a straightforward process that provides a range of immediate and long-term benefits.
Lower Energy Bills: By stopping heat from escaping through your walls, you'll reduce the amount of energy needed to heat your home, resulting in lower heating costs. A detached house could save around £500 a year.
Improved Comfort: It creates a consistent temperature throughout your home, eliminating cold spots and draughts.
Environmental Impact: Reducing your energy consumption helps to lower your home's carbon footprint.
Quick Installation: The process is typically quick and non-disruptive, often taking just a few hours for a professional to complete.
Increases Property Value: An insulated home is more energy-efficient, which can improve its Energy Performance Certificate (EPC) rating and increase its market value by as much as 14%.
%20(1).png)
4 Easy Steps
Free Adviser Call
Free Home Assessment
Quotation and Supplier Selection
Installation and Completion
Speak with an Energy Adviser
If you would like help understanding your options or exploring which energy improvements might suit your home, our expert advisers are here to guide you. They will take the time to learn about your goals and your property so they can offer clear, practical advice that supports your next steps with YorEnergy.
You can use the calendar on the right to book a time that works for you. The next step is simply choosing a slot that fits your schedule, and one of our advisers will be ready to help, whether you need quick guidance or are preparing to begin a home energy project.
.png)
Cavity wall insulation explained
Save on your energy bills.
Lower your carbon footprint.
Get a government grant to help cover the cost
What do air source heat pumps look like and where will they fit in your house?
Part of the heat pump will live outside of your house. This part often looks like a slightly larger air conditioning unit that you might see on buildings when you go abroad. They typically sit on the ground and will often be attached to one of your exterior walls.
How It Fits in Your Home
This solution is suitable for most homes with cavity walls. Before installation, a professional survey is conducted to ensure your walls are dry and in good condition
Materials: Common materials include mineral wool, polystyrene beads, or spray foam, each offering different benefits in terms of cost and performance.
Installation: The process is entirely external and does not require any work inside your home. It’s a clean and efficient way to insulate your walls without disruption.
FAQ's - Cavity Wall Insulation
Is cavity wall insulation insulation right for my house?
Cavity wall insulation is a great choice for most homes in York, built after the 1920s. It’s ideal if you want to save money on your energy bills. If your house has a gap between the inside and outside walls, cavity wall insulation can fill them.
Homes built before 1920 might benefit from internal or external insulation instead. Our advisors can help you decide which is best for your home during a free home assessment.
The cost to install Cavity wall insulation can vary and is based on a few factors:
The size of your home.
The materials used.
The condition of your existing walls.
Plastic beads are often cheaper, costing £14 to £20 per square metre. Spray foam is a little more expensive at £22 to £26 per square metre. A government grant could help you cover this cost.
Here’s the average cost of cavity wall insulation for homes in York:
Type of home | Average cost |
One-bedroom flat | £1,000 |
Two-bedroom terraced | £1,500 |
Three-bedroom semi-detached | £2,700 |
Detached bungalow | £2,100 |
Four-bedroom detached home | £4,600 |
(Based on April 2024 prices).
Average installation time:
1 day
How does cavity wall insulation work?
It adds an extra layer of insulation to the walls of your home, keeping it warm in winter and cool in summer. This means you will use less energy and save money on your utility bills.
Approximate cost saving:
How much you save will depend on the size of your home and your energy prices.
Here’s an idea of how much you could save with cavity wall insulation:
Type of home | Average savings per year |
One-bedroom flat | £100 |
Two-bedroom terraced | £130 |
Three-bedroom semi-detached | £210 |
Detached bungalow | £160 |
Four-bedroom detached home | £370 |
(Energy Saving Trust, based on July 2024 fuel prices).
Energy efficiency:
Cavity wall insulation is a great way to make your home more energy-efficient. A three-bedroom semi-detached home could save 650 kg of CO2 per year. That’s the same as running 200 hot baths!
(Energy Saving Trust. 2024 fuel prices).
Finding the right partners to make energy-efficient changes to our home was so important.
Andrew, Fishergate
Additional Solutions
Are you looking for the perfect home energy solution, complete with excellent customer support?
YorEnergy’s efficient all in one approach makes it easy to upgrade your home's energy efficiency via multiple solutions including solar panels, doors and windows, and paired solutions for even better benefits.
Case Studies
Our case studies are real-life scenarios of York residents who have recently installed energy-efficient solutions in their homes. They have since become our Community Energy Champions, and you will be able to connect with them if you decide to use YorEnergy on your own journey towards energy efficiency!
