Cavity Wall Insulation

One of the most cost-effective and hassle-free options for insulating your property is cavity wall insulation. But is it right for you and your home? Here we answer all your questions about this brilliant method to save money and generate free energy.

What is a cavity wall?

Essentially, these are hollow walls (two walls with a gap in between, labelled the cavity). Often, the outer wall is composed of brick whilst the inner wall is made up of brick or concrete.

Was my property built with cavity walls?

Properties built after the 1920s are prime candidates for cavity wall insulation.

If you’re still unsure, check:

The exterior bricks of your property – is there an even pattern and are the bricks laid lengthways?
The width of your property’s walls – are they more than 260mm thick?

If you answered yes to the questions above, it’s likely that your property can benefit from this simple energy saving solution. If you are still unsure, our team of specialists can advise you further.

What is cavity wall insulation?

Heat is lost from your home in the cavity wall via a process called convection, which refers to the transfer of heat through the air in the gap (the cavity). To combat this, insulating material works by filling the air gap in between the bricks, stopping the convection by trapping the remaining air. Heat transfer is dramatically slowed, meaning your home will stay warmer for much longer.

What are the benefits?

Saves you money! Zing estimates savings of up to £200 per year on energy bills. After 10 years, you will have saved £2,000 (in fact, paying for installation at least ten times over) – remarkable value for a solution so simple.
Keeps your property at a consistent temperature. By slowing the movement of heat throughout the building, you can keep your home at a consistent temperature without the need to keep turning up the heating.
Reduces your carbon footprint. Stopping heat leaking out through walls is one of the simplest things you can do to reduce your energy footprint. By ensuring heat loss is minimised, you won’t need to use as much electricity or gas.
Hassle-free installation. Installation is completed externally in a matter of hours, meaning no mess indoors and minimal disruption to your household.
Fitted for free! If you’re on benefits or are eligible under the Eco Scheme, you won’t pay a penny.

An increasing number of our customers are now asking about cavity wall insulation. While people might think an expensive heating system or a new boiler is the answer to a cold home, the solution can be so much simpler. Rather than creating more heat by whacking up the cost of your fuel bills, instead you can achieve the same thing by stopping heat leaving, staying nice and cosy whilst saving money. A no brainer really!
Zing’s energy expert, Chris Jenkins

Which insulation material is best?.

There are a variety of insulating materials that can be used, ranging from mineral wool, rockwool, polystyrene beads and polyurethane foam. At Zing Energy, we favour carbon coated polystyrene beads – they’re waterproof and designed explicitly to fit and waterproof your cavity and are also equipped with a 25-year guarantee.

What does installation involve and how long does it take?

A trusted and registered installer will check your property’s suitability for cavity wall insulation and recommend the best material to use.

After the assessment, a team of contractors will:

Drill several holes into your property’s external walls.
Inject the cavity wall with material that insulates the heat (each hole is injected in turn, starting at the bottom).
Fill the holes afterwards, with care and attention applied in order to match the existing brick work.

The entire process normally takes around two hours (an average calculated by Zing Energy’s specialist contractors), but this depends on the size of the house and other factors such as ease of access etc.