Cavity Wall Insulation

Looking for cheaper heating bills? Tired of your home being cold and drafty in winter?

Insulating your house walls might be the answer, because you could be losing over £200 every year in lost heat.

How much does insulation for house walls cost?

Typically, it might cost around £1000 BUT most homes in the UK are entitled to a free cavity wall insulation grant that might even make it 100% FREE, subject to status. It’s all part of the government’s ECO (Energy Company Obligation) scheme, which helps UK families and pensioners make their homes more energy efficient.

Can I get a free home insulation grant?

Yes, its really easy. All you have to do is call 0800 368 9938 or take our 30 second test to find out instantly.

We’re confident we can get everyone some sort of home insulation grant, we also specialise in:

  • Free insulation grants for pensioners, jobseekers, families on child tax credit or universal credit
  • Grants for bigger houses with high gas and electricity bills
  • Homes that don’t use mains gas for heating (so those that use solid fuel, electric storage heaters etc)

Why choose BillSaveUK for the insulation in your home?

  • We’re not a cavity wall insulation contractor, we’re a leading UK national installer with decades of experience
  • We only use our own technicians, and can install in as little as two weeks
  • Our customers have awarded us a 5-Star Trustpilot rating
  • You’ll get an independent 25 year guarantee 

So don’t wait until winter to protect your home against the cold, just give us a call on 0800 368 9938 or fill in the form for a no obligation chat.

Want to know more about how cavity wall insulation works? scroll to the bottom of the page for our handy guides.

Simply fill in the details below. One of our team will be in touch shortly.

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Can I get a free insulation grant?

The Government introduced the Energy Company Obligation (ECO) scheme to make energy companies help their customer to reduce both their bills and their carbon footprint.

If the energy companies miss their obligation targets, they incur fines – so they work with the bigger insulation companies like BillSaveUK to make their customers’ homes warmer and more energy-efficient. If you want your home insulated and you qualify for a grant, you won’t need to ask your energy company’s permission first, we’ll do the communication with them.

Most homes in the UK are entitled to a free cavity wall insulation grant, but you’re likely to receive a bigger one if:

  • You’re on a state benefit like Pension Credit, Working Tax Credit, Universal Credit, Jobseeker’s Allowance or Income Support
  • You use something other than mains gas to heat your home. For instance, coal, wood or other solid fuel, electric heaters or storage heaters, log burners etc
  • You live in a bigger house, especially semi or fully detached. This is because your home is energy-hungry and might have a big carbon output

Important note: If you don’t meet the criteria above, you are still likely to receive some form of grant, but the contribution you need to make towards your home insulation may be a little higher. Call or contact us today for more details.

What happens if I choose BillSaveUK?

The process is really simple.

1. Give us a call on 0800 368 9938 for a no obligation chat and we’ll check the size of your wall insulation grant.

2. If you’re happy to have cavity wall insulation installed, we’ll send out a fully-qualified energy assessor to your home to perform a survey and explain everything. There’s absolutely no obligation at this point.

3. If you’re happy to proceed, we’ll book the wall insulation work for a time convenient to you. It could be as little as two weeks!

4. On the day of the installation, our fully-trained technicians will complete the cavity wall insulation in just a few hours and clean up after themselves. You’ll be asked to approve the before they leave your property.

5. We’ll send you your guarantees through the post within 8 weeks

6. Want to know more? Watch the videos below or take a look at our FAQs

How does cavity wall insulation work?

Most homes built after the 1920s feature outside walls with an air-gap (or cavity), of at least 50mm in between. Insulating cavity walls is one of the best ways to cut your heating bills by up to 35%, and make your home warmer in winter.

DIagram showing how cavity wall insulation works

However, not all houses have cavity walls, and a lot of homes built before the 1920s have solid walls instead. Solid wall insulation normally requires exterior cladding panels to be applied, but BillSaveUK does not offer this due to safety concerns with the materials used.

Instead, when BillSaveUK insulate your house walls, we drill a series of small holes into the outside wall of your property. Then, we blow top quality Knauf mineral fibre insulating material into the cavity using specialist equipment.

This fibre is made from sustainable recycled materials (usually a glass wool) so has the added bonus of being environmentally friendly in its own right.

Another added benefit of cavity wall insulation is better control of the temperature of your home in the summer. This is because, with an uninsulated home, sun on the outside wall creates warmth that conducts through the brickwork and heats up the cavity. However, insulating your cavity walls creates a thermal barrier that prevents this heat transfer, helping you to keep cool during the summer months.

Does cavity wall insulation cause damp?

If properly installed in a suitable property, then there should be no damp caused by cavity wall insulation. Previous examples reported in the press are more to do with unscrupulous or poorly judged installations and do not represent how BillSaveUK operates.

To prove our point of view, we’ve created this handy 5-point guide to whether Cavity Wall Insulation is right for you:

1. Will it work with your weather zone?

The UK is divided up in to four different zones according to how exposed they are to wind-driven rain. Different zones use different construction techniques to protect them against the elements, and some won’t work with cavity wall insulation, otherwise damp might occur.

Unlike some suppliers, BillSaveUK will never install cavity wall in high exposure areas.

Check the exposure level of your home 

2. Insist on a detailed home survey

Cavity wall insulation should never be installed without a detailed home visit survey being carried out by an approved assessor. The survey should check for existing damp and condensation in your property and if the levels are too high, cavity wall insulation shouldn’t be installed.

All our survey team are approved and are qualified Domestic Energy Assessors.

3. Look for areas of weakness

Check for visible cracks in the mortar or other visible defects to your external walls or guttering. You may need to get these fixed before having your cavities insulated. Otherwise, there’s a chance that water might have already entered the cavity and would therefore make it unsuitable for insulation fibres to be blown in.

Our assessors are trained to spot these defects

4. Check the after-sales service

A good installer should contact you afterwards to see if you were satisfied with the work carried out and listen to any concerns you have – no matter how small. All completed CWI measures are also issued with an insurance backed guarantee for added peace of mind.

BillsaveUK offers a 25 year guarantee and has a 5 Star TrustPilot rating

5. Tried and trusted

Finally, only ever employ the services of a reputable, accredited installer. Sadly, there are some rogue traders out there who could land you in a worse situation than when you started.

We’re fully industry-accredited. Find out which organisations have given us their stamp of approval

* Saving drawn from Energy Saving Trust figures in 2017.

** Free installation is subject to eligibility checks.