Cavity wall insulation - for wall-to-wall energy saving!
Did you know that around a third of the heat lost at home is through the walls?*
Just insulating your cavity walls could save you up to £135* a year on your fuel bills and 560kg of CO2.
Cavity wall insulation will help to create an even temperature around your home, help to prevent condensation on the walls and ceilings and can also help to keep your home cooler during summer hot spells.
Call us today on 0800 321 3456
or apply for your free home assessment!
*Approximate bill savings are for an average semi-detached 3 bedroom gas heated house and assume a gas price of 4.49kWh. Larger and detached properties could obtain higher savings. Savings published by the Energy Saving Trust (October 2011).
Download your free guide to insulation
Free cavity wall insulation*
See how much you can save with the Tesco Home Insulation Service:
Prices quoted are for all homeowners, residential landlords and private tenants:
Cavity Wall Insulation |
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| Property type | Maximum Meterage | Typical Price | Price you pay with Tesco* |
| 1 bed flat | 50 m2 | £347 | FREE |
| 3 bed mid-terrace house | 55 m2 | £360 | FREE |
| 2 bed detached bungalow | 95 m2 | £527 | FREE |
| 3 bed semi-detached house | 95 m2 | £323 | FREE |
| 4 bed detached house | 140 m2 | £740 | FREE |
All prices quoted above are inclusive of VAT.
*Please note:
The free insulation offer is subject to a suitability assessment and limited funding. If your property exceeds a maximum meterage (+ £5 per additional m2), requires additional works (scaffolding, roof vents, core vents, walkboards, pipe insulation, water tank insulation, extra wide cavities), or has more than 60mm of existing insulation you will be charged a contribution fee. At the time of your free no obligation suitability assessment, your assessor will confirm if you will need to pay an additional contribution due to excess meterage or additional works.
We do not have funding for under tile insulation or where there is already more than 150mm/6 inches of existing loft insulation.
The Tesco Home Insulation Service is currently only available in mainland Great Britain and the Isle of Wight. Tesco plans to extend the coverage of the service to include the Scottish Islands in the New Year. If you live in the Scottish Islands and have applied/would like to apply, Tesco is currently registering all enquiries and will be in touch when we can service your enquiry.
For full terms and conditions please click here.
Good to know…
The main insulation materials used are glass or mineral fibre that is chopped up and blown into the cavities.
Some installers may also offer bonded bead (white polystyrene beads), particularly in cases where glass or mineral fibre is not suitable.
All systems have been tested, assessed and approved by the British Board of Agrément or the British Standards Institution. The material is guaranteed for 25 years against any defects. (Guarantees are provided by the Cavity Insulation Guarantee Agency - CIGA).
Cavity wall insulation - assessment & installation guide
Assessment:
The assessor will:
- Check your walls are suitable for cavity wall insulation and are not already insulated.
- Require access to your external walls.
- Drill at least one hole in your property to check the cavity .
- Ensure the holes are sealed.
- Check the safe operation of any gas or solid fuelled appliances in your property and advise if extra ventilation is required at point of installation.
- Provide you with a copy of the completed survey outlining the nature of the work to be undertaken, and any necessary additional chargeable works and the total cost payable by you.
Installation:
Customer Checklist:
- Ensure your driveway is clear for our installation van.
- Speak to neighbours if access is required and warn of potential minor disruption.
- Close windows and doors.
- Move breakable items away from walls and window sills.
- Have a hose ready if you want fitters to wash down after drilling.
- Upon completion check premises and sign a form to confirm the work has been carried out to your satisfaction.
Customer information:
- Cavity wall insulation takes 3–4 hours to install.
- The installers will require access to your external walls.
- The drilling process can be quite noisy, generate a small amount of dust and create some vibration in the walls.
- The insulation material used will be mineral wool, polystyrene beads or foam. All materials are non-hazardous to your health, do not emit any smell, and are fully approved by the British Board of Agrément and British Standards.
- Up to 12 weeks following completion of the works you will receive a Cavity Insulation Guarantee Agency (CIGA) 25 year guarantee. Please keep this with the paperwork for your home as it should be passed onto the next occupier should you move in the future.
Step by Step:
Step 1
A series of small holes will be drilled into the external walls of your property.
Step 2
The insulation material is blown via a nozzle through the small holes into your wall cavities.
Step 3
Once the filling process is complete the installers will re-mortar and finish the small holes making every effort to match your existing walls as far as reasonably practicable.
Step 4
If you have any airbricks or air vents in your external walls the installers will ensure that they are sleeved to maintain their operation. Where they are not sleeved, a new sleeved air brick/vent will be installed. Redundant air bricks/vents will be sealed to prevent water ingress.
Step 5
If you have any gas or solid fuelled appliances in your property the installer will check the safe operation of these appliances after the cavity wall insulation is installed.
Step 6
Once all of the work is complete the installers will sweep up surplus debris.
