With the ‘coat’ system a building is insulated by placing foam or mineral wool fibre panels on the outer face of the outer walls; with this solution thermal bridges are eliminated, especially in relation to pillars , windows parapets and floor supports, and with them the formation of condensation, mould and stains inside.
Coat insulation enhances the phase shift and the thermal wave damping of the building and allows us to optimally utilize thermal inertia, certainly greater for buildings made with very thick walls.
Thermally insulating a building is in fact possible using heat waves depending on the season in which you are located: in the winter seasons, the walls accumulate heat during the hours of operation of the heating and if well insulated they emit very little outside, then release it slowly inside during the night hours reducing the discomfort resulting from shutdown or the reduction of the heating. In the more hot and sunny seasons, on the contrary, the insulation package delays and decreases the entrance of the thermal wave peak in the building by moving it to the night hours when the outside temperature is cooled and it is possible to ventilate the inside walls.
The adoption of high thicknesses of thermal insulation therefore reduces heat output in winter and heat input in summer; if positioned on the outside of the wall, with the coat system it also enhances the thermal inertia of masonry; this type of installation is particularly recommended in permanent homes where winter heating is constant and systematic.
The installation of the coat is also recommended when the plaster needs renovating, offering the above noted advantages, eliminating the risk of efflorescence blistering and exploiting the opportunities of the scaffolding around the building.