Insulation of a home from the inside of the walls can be accomplished by supplementing a conventional insulation with 1 or 2 layers of thick insulation and the addition of a thin reflective product or an ultra-reflective vapor barrier. The result obtained then constitutes a more efficient formula. It is also possible (according to French legislation) to reinforce an interior insulation by the use of a multilayer product (multilayer 50 mm thick) in addition to conventional insulation. In all cases used, the thin product or the reflective vapor barrier must be completely concealed by the cladding.
- Meter and pencil
- Screwdriver drill
- Double-sided adhesive
Placing cleats and laying insulation
1. Create a wooden frame with rough cleats of 38 x 65, fixed in the blocks (or bricks) of the wall by dowels to hit of suitable dimensions. Space intermediate cleats about 60 cm. The semi-rigid panels of the traditional insulation (without vapor barrier) will be placed between these cleats. Once installed, the insulation should allow to exceed 20 mm cleats to provide an air gap with the thin insulation used here (airflex or barchaleur). If the thickness of the traditional insulation (in this case 45 mm) must be greater, increase the thickness of the cleats.
2. Measuring and cutting the thin product (or vapor barrier) is always done on the ground for reasons of practicality, whether it is insulation from the outside or the inside. Unroll the thin product and cut it with ruler and cutter, to the required dimensions by adding 10 cm.
3. Position the thin product widths on the intermediate and peripheral cleats, then staple. Remember to let the extra 10 cm exceed at the top and bottom of the width.
4. Connect the widths to the built-in double-sided by removing the protective strip. Rub with a cloth to ensure a good seal to air and water vapor.
Staple the insulation, fix the rails and lay the siding
1. If the thin product is used alone, for its reflective virtues, it is preferable to connect the widths to the floor before stapling them on the peripheral and intermediate cleats. It is recommended to place double-sided adhesive on these supports at several points to facilitate the operation. If you can get help, it's even better.
2. On the thin product thus stapled, whatever its thickness, screw the peripheral rails by trapping the product (in order to guarantee a good seal) between the wood of the cleats and the metal of the rails which will serve as support for the cladding. Insert the intermediate posts between the peripheral rails, then trim the excess thin product up, down and to the sides with a cutter.
3. You have to lay the siding, (plasterboard alone or composite panel for good thermal insulation) and screw it on the metal furrings of the external frame. The thin product will thus be completely masked according to the French legislation in force. If you drill the thin product to pass electrical cables for example, be sure to seal with aluminum adhesive placed around and / or putty glue.
(photos / visuals: © KdB insulation, except special mention)
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