Installing cavity wall and loft insulation will not only reduce your heating bills, it will also make your home feel more comfortable and reduce your carbon footprint!

Cavity Wall Insulation

Enquire today for a free no obligation quote

Cavity wall insulation can drastically lower your energy bills, increase internal comfort, reduce your carbon footprint and provide soundproofing from any unwanted external noise!


Cavity Wall Insulation

Approximately 35% of your homes heat is lost through your walls. Insulating your cavity walls can save you up to £480* per year as well as up to 1.1t of CO2!

At A to Z Energy Solutions we install fibre cavity wall insulation. The product we use is Instafibre 040 which is high quality, water repellent glass mineral blowing wool insulation, manufactured by Knauf.

It has the best Euroclass A1 reaction to fire and is manufactured using recycled glass.

The product is designed to last the lifetime of the building.

*Figures quoted from the Energy Saving Trust and based on installing cavity wall insulation to an uninsulated gas-heated detached house.

Contact us today to arrange a FREE no obligation survey.



initial inspection and survey

We always arrange a free site survey before providing a no obligation quote for cavity wall insulation. As you can imagine, every home is different and it is essential that the property is inspected before agreeing to any works.

At the survey, initially we will visually inspect the walls to determine whether there are signs of a previous installation. If there are no previous injection points present, we will conduct a drill test and boroscope check.

A small hole (12-14mm) is drilled in an inconspicuous area on each elevation and a camera is inserted. This allows us to inspect the condition of the cavity, ensuring there is no rubble or debris bridging the gap. A cavity wall can only be insulated if it is clear of any rubble or debris. All holes drilled will be effectively sealed to prevent water ingress.

The cavity width will also be measured. The cavity must be a minimum of 50mm in order to be filled with our cavity wall insulation. This allows the material to spread evenly throughout the wall ensuring there are no voids!

Damp proof courses (DPC) will be inspected to make sure they are of adequate height above ground level and any remedial action required pointed out to the occupant or owner.

We will assess the access around the property and check any fuel burning appliances within the home. Certain appliances may require additional combustion ventilation and this will be explained should they be required.

We’ll then take some measurements and provide you with a quote!


installation process

On the day of install, the installer will carry out their pre-install checks. A quick walk around the property to make sure everything is as it should be on the survey and a risk assessment carried out. They will also need to check any heating or fuel burning appliances within the property.

We recommend any photo frames, mirrors or ornaments on external walls and window sills be removed as the drilling can cause some vibration to the wall.

Once all checks are complete, a power point either internal or external should be provided so that the drilling can begin. Holes are drilled at approx. 1.35m intervals through mortar joints, as set out by the system manufacturer.

Once all the holes are drilled and any combustion vents or barriers installed, the filling process can commence.

The walls will be filled usually from the rear of the property, starting with the lowest holes first and working our way to the top of the house. Each hole will be made good as we go to match the existing finish. Once dry you shouldn’t notice that we’ve been!

Your property will then be tidied up and you are free to have a look yourself to ensure you are completely satisfied before we leave.


combustion ventilation

As mentioned, certain appliances require additional ventilation for combustion in order to function safely. If no existing vent is present, a 5″ core vent will be installed to meet this legal requirement. Below are some of the appliances which may be affected:

  • gas fires with a heat input rating over 7kw
  • decorative fuel effect gas fires of any kw rating
  • wood burners with a heat output rating over 5kw
  • open fires
  • open flue gas or oil boilers
  • Aga or Rayburn cookers



Homeowners, landlords and commercial properties

Whether you’re a homeowner, landlord or builder, we can assist you in getting your walls insulated. Everyone can benefit from having cavity wall insulation installed in their property, if suitable.

If you are a homeowner, we can insulate your walls to help reduce heat loss and save money on your energy bills.

Landlords, whether you have one property or multiple, get in touch to see if we can help. We will happily look through your portfolio to determine which homes would benefit from additional insulation. Up to date Energy Performance Certificates can also be provided if required.

Commercial properties can also be insulated to reduce energy bills and create a more comfortable office space. We have worked with various clients to upgrade commercial insulation.



New Build and Refurb

No job is too big or too small!

Whether you are extending, or have a site with multiple plots, at A to Z Energy Solutions we can cover it all.

Whether you’re building properties with a 100 to 150mm cavity width, or refurbishing an existing building, we have a cavity wall insulation system for you. Instafibre 040 and 034 can provide different uvalues depending on your need.

We’re also able to install Loft Insulation to current guidelines, ensuring you meet building control requirements. 

Get in touch today to find out how we can help take the stress out of getting your project insulated.

We have experience in quoting from drawings or can arrange a site visit to discuss your needs.