Cavity Wall Insulation

Fast facts

  • Keep your home warm in winter and cool in the summer from under £9 per month
  • Savings of up to £250 per year
    off your energy bills
  • 0% finance available on loans
    between 12-60 months


“Mark Group were very professional when fitting the cavity wall insulation and the house was left very tidy. We have noticed an improvement in the property and even through the cost of gas has risen, our bills are now less.”

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Cavity Wall Insulation is one of the most effective ways that you can improve the energy efficiency of your home, reduce your energy bills and help the environment. Your home could be losing up to 35% of its heat through the walls, because of the way that it is constructed. Cavity Wall Insulation prevents heat escaping, making it easier and cheaper to heat your home. A typical property could save up to £250 a year on energy bills.

Whether you plan on financing it yourself, or you’re eligible for government funding, get in contact with Mark Group today.

How does Cavity Wall Insulation work?

Most modern homes are constructed with an ‘air-gap’ or cavity walls, and filling this with insulating material can significantly reduce heat loss. However, not all homes are constructed in this way, and as such, your home will need to be surveyed to make sure it is suitable first.

Once this has been confirmed, our insulation team will drill a series of small holes into the outside wall of your property. Then, they will insert insulating material into the cavity using specialist equipment.

The insulating material can be made from a variety of different materials, but is usually made from recycled granulated mineral wool fibre or polystyrene beads. In effect, this creates a blanket effect that will prevent heat escaping.

This means that you use less energy to keep your home warm, helping you save money on your bills.

Why choose Mark Group?

Mark Group is an expert in insulation and energy efficiency when it comes to your home. We help over 7,000 homes, schools and businesses every week. We pride ourselves on offering excellent service, peace of mind and value for money.

Once you have had your cavity wall insulation fully installed, we will obtain a 25 year guarantee for you, so you know that you’ll have a cosy home for years to come.

How much does Cavity Wall Insulation cost?

The cost of cavity wall insulation varies depending on your property. Here at Mark Group, we can install insulation from as little as £9 per month, but it does depend on the results of your property survey.

Through our brand new payment scheme, Eco Advance, you can spread the cost of Cavity Wall Insulation across affordable monthly payments. Plus, if you choose to take out our finance for a period of under five years, you'll benefit from 0% finance.

Government funded Cavity Wall Insulation grants are also available through the ECO government scheme. The funding available depends on the amount of carbon emission savings predicted for after the insulation has taken place. For more information, take a look at our Frequently Asked Questions.

Find out if you qualify by using our free online funding tool today and start your journey to a more efficient home.