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Loft insulation can save you up to £480 in energy bills a year.
Uninsulated properties generally lose 45% of the heat generated by their central heating system. Most of the heat loss happens in the loft of your home because of the fact that warm air rises. This means that keeping your loft insulated is essential to keeping your home warm and your energy bills low.
Loft insulation is the process of laying down insulation material between the joists of your loft. This prevents heat from escaping during winter, as well as preventing it from penetrating your living spaces in the summer.
Due to the relative simplicity of the process, loft insulation is one of the cheaper insulation methods out in the market. Add a 40 year lifespan into the mix, and you have an effective insulation method that essentially pays for itself several times over, thanks to lowered energy bills.
For Accessible Lofts:
Loft Insulation involves placing rolls of mineral wool insulation between the joists in your loft. One layer of insulation material will be placed between the joists. A second layer should be placed over the joists and additional layers must be added on top of it until a certain depth requirement is met. The additional depth is needed to effectively prevent heat from passing through the insulation material.
This process, however, will only work if you don’t plan to use the space in your loft. In order to use your newly insulated loft as living space, you will need to place boards over the insulation material. Materials like mineral wool owe their insulative properties to the air that’s trapped in them. Squashing these materials will result in the loss of their insulative properties.
This means that you can’t just place boards directly over the insulation material. The floor level must be raised using timber battens or plastic legs before laying down the boards. Even with timber battens or plastic legs in place, it’s still necessary to leave a ventilated air gap under the boards. This will help prevent damp spots from forming.
For Inaccessible Lofts:
Lofts that are difficult to access can still be insulated with cellulose fibre or mineral wool using blown insulation. This method requires specialized equipment that can blow loose insulation material into the inaccessible loft. The process is similar to that of Cavity Wall Insulation and can be completed by professional installers in a few hours.