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The Cavity Wall Insulation Installers

The Cavity Wall Insulation Specialists Installers, offering Funding & Grants

One third of the heat from your home escapes through uninsulated cavity walls. Cornerstone has a wealth of experience in the installation of Cavity Wall Insulation for household walls throughout East Anglia including Norfolk, Suffolk, Cambridgeshire, as well as Essex, London and the South of England.

Cavity Wall Insulation Norfolk

By installing Cavity Wall Insulation in your home you could:

bullet Save up to £250 on your energy bills every year*
bullet Reduce damp and condensation in your home
bullet Reduce damp and condensation in your home
bullet Make your home warmer

What is Cavity Wall Insulation?

If your home was built after 1920 it is likely that you have cavity walls. This means the outside walls are made up of two layers with a gap or cavity in between. Up to a third of household heat can be lost through the walls so insulating them is an excellent way of reducing costs and conserving heat.

Cavity wall insulation is a product that is inserted between the two layers of your walls to help keep the heat in.

You should be able to tell which wall type you have by looking at the brickwork on the outside of your house. If your home has cavity walls, you will only be able to see the long side of the bricks like Fig A.

If your home has solid walls, you will be able to see a pattern showing the long and short side of the bricks like Fig B.

What is Cavity Wall Insulation?
JUST the long edge of the brick showing   Solid Wall BOTH the long edge and short edge of the bricks showing.
Can your house have Cavity Wall Insulation?

Your home will usually be suitable for cavity wall insulation if:

bullet External walls are cavity walls that are currently unfilled
bullet The cavity is at least 50mm wide
bullet The brickwork of your property is in good condition
bullet Your property is more than 25 years old
bullet The walls are not exposed to driving rain.
Are your external walls easily accessible?

When cavity wall insulation is installed, it must be “blown” from the outside of the house into all parts of the wall. The installer must be able to access all parts of the external walls to do this properly. The installer may also need to insert a “cavity barrier” which prevents the installation affecting your neighbours if your external walls are attached to another property, for instance, your home is semi-detached or a terrace.

What if you have damp walls?

If you have any damp patches on any of your internal walls then they should not be insulated until the problem is resolved. It is best to speak to a builder who specialises in damp prevention who should be able to advise you on any repairs that may be needed.

Installing cavity wall insulation

Cavity wall insulation is not something you can do yourself, it must be carried out by a registered installer. The process involves:

bullet Drilling small holes about 22mm wide, at 1 metre intervals across the external walls of your house, through to the cavity space
bullet Specialised equipment is then used to “blow” the insulation through these holes into the cavity
bullet Once the whole wall has been filled, the installer will fill any holes that were made so that they are barely noticeable.

Potential savings

House type   Approximate savings per year*   Carbon dioxide savings per year*
  Save up to £250
  Around 1040kg
Semi detached   Save up to £145   Around 600kg
Mid terrace   Save up to £95   Around 395kg
*Figures from the Energy Saving Trust. Estimated figures based on insulating a gas-heated home. The average installed cost is unsubsidised
Interested in finding out more? Telephone our team on 01379 853 613 or click here to fill in our contact form and we will get back to you.

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All of the Cornerstone staff and operatives were polite and helpful throughout the whole project. And as for my heating bills, I can safely say I have noticed a huge difference not only with the warmth of my house but also my bills at the end of the month! - Mr H Our gas bills have now reduced dramatically, making them more affordable. We are very please with the service we received and would recommend your company to all of our friends. I would just like to say how delighted I am with your work on my cottage, and a huge Thank You. The transformation is remarkable; my family and friends have made very favourable comments. I would have no hesitation in commissioning Cornerstones again for more work! – Mrs G
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