Cavity insulation is one of the most cost-effective ways to improve your property’s energy efficiency. It fills the gap between your home’s inner and outer brick walls and reduces heat loss, helping to keep your house warmer in winter and cooler in summer. It’s also a key component of any Green Homes Grant application.
There are a variety of cavity wall insulation materials available, but the one you choose is dependent on the type of property and personal preference. If you’re not sure what is best for your house, or if retrofitting cavity wall insulation is appropriate, it’s worth seeking out the advice of an experienced installer.
If you’re looking to save money on your heating bills and improve your Green Homes Grant application, then a good start is by ensuring that your property has cavity walls. You can check whether your home has cavity walls by examining the external brick work, or you can look at the EPC (Energy Performance Certificate) to establish if your property has cavities.
There are various types of cavity insulation, but the most common is mineral wool. This is a dry fill method that uses granulated fibre that is blown into the cavity through holes drilled in a predetermined pattern. It’s a popular choice, and it is usually fairly quick to install. It is also inexpensive at PS10-15 per square metre (excluding labour). Modern EPS polystyrene bead systems are an alternative to mineral wool, which use a bonding agent to stick the beads together. This prevents them from settling, and helps to leave no mess behind after installation.