According to the Energy Saving Trust (EST), around one-third of the heat loss from most homes is through the walls. By insulating your walls with cavity wall insulation, you can benefit from saving up to £165 per year on your energy bills, help to reduce your carbon footprint and keep your home warm in the winter months.
In this blog, we address some of the frequently asked questions from our customers.
What is cavity wall?
The external wall of a house is constructed of two masonry (brick or block) walls, with a cavity (gap) of at least 40mm between. Cavity widths do vary depending on the build type of the property.
Is my house suitable?
If your house was built after the 1920s, it is likely to have cavity walls. Older houses (pre-1920) are more likely to have solid walls, with no cavity and possibly no damp proof course.
Before the installation, one of our retrofit surveyors will carry out a free no-obligation assessment of your property to confirm that it is suitable for insulation. Once it has been confirmed, the survey will be uploaded to the IAA (Insulation Assurance Authority) where they will complete an independent inspection to confirm suitability and consumer protection. Once the property has been independently deemed suitable for retrofit cavity wall insulation, a member of our team will contact you to arrange a date for install.
How is cavity wall insulation installed?
Retrofit cavity wall insulation is injected with insulating material by drilling holes through the mortar joint of the external leaf. The drill holes are 22-26mm in diameter, dependent on the material used. The holes are then made good after injection. Each hole is injected in turn.
I have vents at my property. What will your installers do with these?
Any ventilators supplying air to gas appliances will be safeguarded by installers. This would be the same with any underfloor ventilation. The installers will check to see if these are suitably sleeved.
How long does it take?
Cavity wall insulation can be completed within 2 to 4 hours. However, this will depend on the size of the house and access around the property.
My house is semi-detached, how do they stop insulation going into my neighbour’s cavity?
Our installers will insert a cavity barrier at the party wall line if your neighbour’s property is uninsulated. If your neighbour’s property is insulated, no barrier would be required.
What about filling the holes?
Our installers will fill all the injection holes with mortar to match the existing as closely as possible.
What product do you install?
We install either a bonded bead or white wool fibre products which are both systems of cavity wall insulation that have been tested, assessed, and approved by the British Board of Agreement (BBA) and KIWA.
Looking to save money on your energy bills with free insulation?
If you are a low-income household on certain means-tested benefits and credits, and either a private homeowner or private tenant, living in poorly insulated homes you may qualify for funding
Are you ready to save money on your energy bills with free insulation?
Ensuring your home is adequately insulated, has many benefits. You can benefit from:
- Savings on your energy bills
- Warmer home in the winter, cooler in the summer
- Increases the value of your property
- Helps to reduce your carbon footprint
If you are a low-income household on certain means-tested benefits and credits, and either a private homeowner or private tenant, living in poorly insulated homes you may qualify for funding.