Attic Insulation Visalia you may be able to fit into your home will be largely dependent on the type of walls you have. A cavity wall is built by two layers of brick with an air gap in between, and a solid wall is built of one layer of brick. Cavity wall insulation is fitted by drilling small holes in the wall and pumping the insulation into the cavity through a nozzle. Solid walls can let out up to twice as much heat as cavity walls which is estimated at around 20% of the total heat loss in the house. Insulation can be fitted to these walls either internally or externally. It can be done either by making a stud wall and inserting mineral fibre wool or by attaching rigid insulation boards.
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