The wall is faced with stone, brick, concrete blocks or poured concrete. Insulation consists of lining the inner surface of the wall by applying batts (or rolls) between the vertical uprights that provide a support for the Siding). Continuous insulation with a stone-lined facing is also possible.
In refurbishment work, make sure that the outer façade is in good condition, since it will be providing the air- and water-tightness of the wall, an essential condition for guaranteeing durable thermal insulation. If this is not the case, you will have to either :
The surface receiving the insulation must be clean and dry.
The thickness of the uprights and cross beams depends on the thickness of the insulation to be installed. These can be :
For optimum insulation, preferably use staggered double layer insulation (e.g.: 60 + 60 cm). Mechanically attach the metal framework that will support the interior Siding (gypsum board, Fermacell, OSB, etc.).
Nota : the insulation can be glued directly using gypsum plaster mortar to the inner surface of the outer walls.
It is compulsory to install a Siding with M1 fire rating.
Store rolls and batts in their original packaging, protected from rain and direct sunlight.
Cut the insulation to the required width between supports, with an excess of 2 cm, and place the insulation under gentle compression ("spring effect") to ensure perfect contact with the uprights.
To ensure continuous insulation, take special care when sealing the joints between walls (wall / floor / slope) and checking that the strips are in perfect contact.
Ensure the maximum seal of the insulation by installing an offset, continuous vapour barrier on the inside (hot) and a roof-boarding screen that is pervious to water vapour on the outside (cold).
Install a finishing facing with maximal fire rating (mandatory).