An Overview of Cavity Wall Insulation Suitability, Materials, and Procedure
Additional facts about cavity wall insulation you should know about
If you believe that your home has cavity walls that have not been filled, then it may be high time for you to install cavity wall insulation. But before you contact an installer, you would also need to make sure that your home is truly suitable for cavity wall insulation. Suitability depends on different factors, such as the accessibility of your home’s external walls and so on. You would also need to know more about how the installation procedure works, and what materials you can choose from in order to make the right decision that can lower your energy bill and make you and your family more comfortable at the same time.
It is not nearly enough to have walls that have a cavity in between – there are other considerations that affect the suitability of your home for cavity wall insulation, as energy experts like npower will tell you. For instance, your home’s suitability would depend on the external walls’ exposure to rain and harsh weather conditions, the quality of your home’s brickwork or masonry (it has to be in a good state and not dilapidated), the size of the cavity (the cavity needs to be 50 millimetres wide or more), and the kind of material you would like to use for insulation. Another factor to consider regarding your home’s suitability is the condition of your interior walls. If your home’s interior walls have problems with damp or condensation, you would need to have this addressed first before the cavity walls are filled. Also, if you have any electrical cables covered in PVC in the cavity, these would have to be removed before the installation commences.
Your choices in insulation materials
There are three common kinds of materials used for cavity wall insulation: blown fibre, polystyrene granules or beads and foam made from urea formaldehyde.
This can be composed of mineral wool or fibreglass strands, which are then blown into the cavity with the use of equipment expelling compressed air. Blown fibre is covered by the BBA, or British Board of Agreement certificates.
Beads of Polystyrene
This can be bought as a resin, which allows them to be held together, or loose. The granules, on the other hand, can easily fuse together on their own due to their shape. Polystyrene granules or beads are also blown into the cavity with special equipment, and are also covered by BBA certificates.
Foam Made From Urea Formaldehyde
This is the third type of material available for cavity wall insulation. This material is actually produced right inside the cavity with an injection that mixes two chemicals, resulting in the formation of the foam. This foam then expands or swells until it completely fills the wall’s cavity. The foam is covered under the British Standards BS5617 and BS5618 for both the application and the material itself.
The procedure for installation
The installation should be done by a registered installer. For best results, they should present you with a CIGA, or Cavity Insulation Guarantee Agency guarantee. For a standard installation, tiny holes are drilled along your external walls at 1-metre intervals. The insulation material is then blown into the wall’s cavity through the holes. When the work is done, the holes are filled in again.
Learn all that you can about cavity wall insulation to ensure the proper insulation of your cavity walls. Consult with an energy specialist today.
Image attributed to Tim Gillin/Flickr.com – flickr.com/photos/tgillin/2050913079/
Source: haringey.gov.uk/cavity_wall_insulationDisclosure: This post was a collaboration between Home on Deranged and Ocere. Monetary compensation was received.