Your house is a system and like any other system the more efficient it is the less it costs to run it. Insulating your attic is one of the most effective ways of making your home more energy efficient and reduces the cost of heating your home. A 100-300mm layer of earthwool insulation is placed between the timber joists running across the attic.

This is the optimal amount as anything above that would not be cost effective. Earthwool is made using recycled materials and is an environmentally friendly product.