28 Mar 3 Types of Property Insulation That Will Reduce Heat Loss & Cut Energy Bills
Insulation is one of the most effective ways to reduce heat loss and cut energy bills in your home. Loft insulation, cavity wall insulation, and solid wall insulation are amongst the most effective insulation methods to save money and keep your home warmer, and in this article we provide a short guide to each.
Heat rises, so in an uninsulated home, about 25% of heat is lost through the roof. So installing insulation in your roof or loft is a great way to reduce heat loss. Loft insulation is also the most cost-effective form of insulation, as you could save up to £250 per year by installing it.
Loft insulation takes just a few hours to install and you can install it yourself. The recommended thickness is to install insulation 270mm thick to stop heat escaping. You can use mineral wool rolls to insulate your loft which can simply be rolled out and laid flat on the loft floor. Firstly, roll the mineral wool between the ceiling joists and roll another layer on top at right angles to cover the ceiling joists.
If access to the loft is difficult, loose fill products such as mineral wool and cellulose fibre can be blown into the space to insulate the loft, but this will need to be performed by a specialist contractor.
Cavity Wall Insulation
⅓ of the heat lost in an uninsulated house is lost through the walls. Most homes in the UK built after 1930 will have a cavity wall, which is an external wall made from two layers with an inner and outer wall and a gap or cavity in between them. Cavity wall insulation involves filling this gap in between the two external walls to prevent heat from escaping from your home.
Installing cavity wall insulation could save you £140 per year on energy bills. Cavity wall insulation is installed by drilling small holes in the outer wall and injecting the insulation material (blown mineral fibre, polystyrene beads or granules, or urea formaldehyde foam) into the gap before refilling the drilled holes.
Insulation takes about half a day and is not expensive or disruptive, but must be installed by a professional contractor. Suitability must also be assessed before installation, as cavities less than 50mm wide are not suitable, neither are homes with damp or penetration issues. Further, the wall masonry must be in good condition and the walls must not be exposed to driving rain in order to install cavity wall insulation.
Solid Wall Insulation
Solid walls let through twice as much heat as cavity walls, so insulating your solid walls can significantly reduce heat loss and you could save between £145 and £455 per year by installing solid wall insulation. If your home was built before 1920, your external walls are most likely solid rather than cavity. In contrast to cavity walls, solid walls have no gap so they let more heat escape.
It is more difficult, disruptive, and expensive to install solid wall insulation than cavity wall insulation. You can choose to add insulation to the internal or external solid wall, depending on your property.
Internal Solid Wall Insulation
Internal solid wall insulation involves installing a layer of insulating material such as mineral wool fibre to the internal wall and applying a render over the top, or installing a stud wall filled with mineral wool fibre.
This technique can be disruptive as you will need to remove skirting, door frames, and fittings, and will reduce your room size. This method is cheaper than external solid wall insulation, but is still expensive, costing around £5500-£8500, with savings of around £460 per year on your energy bills.
External Solid Wall Insulation
External solid wall insulation is installed on the outside of your property and involves wrapping the wall in insulation and covering it with render or cladding. To install this type of insulation, you will need to remove and reinstall water systems and anything attached to the external wall, but it can help weatherproof and soundproof your home whilst renewing its appearance.
External solid wall insulation is expensive, costing around £9500-£13000, but you can cut costs by considering it as part of a wider project, and it can save you around £490 per year on energy bills in the long term.
Insulate Your Home Today
Reduce heat loss and cut energy bills with loft insulation, cavity wall insulation, or solid wall insulation. Making a small change to your property’s insulation can have a big impact on not only your savings but the environment too. For more tips and advice on insulation or any questions about your property, get in touch with Allcott Associates today.