The Content Of The Article:

Overall insulation of the walls from the inside

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.

Necessary material

  • Meter and pencil
  • Cutter
  • Rule
  • Hammer
  • Screwdriver drill
  • Double-sided adhesive

Placing cleats and laying insulation

Placing cleats on the inside wall

Placing cleats on the inside wall

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.

Ground cut of thin product

Ground cut of thin product

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.

Staple thin insulation on cleats

Staple thin insulation on cleats

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.

Protective tape of the built-in adhesive system

Protective tape of the built-in adhesive system

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

Connection of the ground widths

Connection of the ground widths

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.

High placement of thin insulation

High placement of thin insulation

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.

Laying the siding on the thin insulation

Laying the siding on the thin insulation

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)

Overall insulation of the walls from the inside: product

On the same topic

  • Questions answers
    • Wall insulation from the outside in 5 questions
    • How to insulate walls covered with carpet?
    • Can we stick an insulating doubling on Depron?
    • How to improve the insulation of a house?
    • How to insulate a double wall?
    • How to improve the efficiency of a thermal insulation?
    • How to deposit a glued doubling to replace it?
    • How to insulate the attic of a house in the south of France
    • How to isolate the garage of a BBC house?
    • How to insulate a false ceiling?
    • Can we keep old insulation?
    • Can we isolate a barn in blocks with mud?
    • How to insulate a rammed wall from the outside?
    • With what to heat a room of high height?
    • How to put a dubbing on an old wall?
    • What thin insulation for interior walls?
    • How to insulate thick stone walls?
    • How to complete an existing insulation?
  • DIY tips
    • How to phonically isolate your house with the right materials?
    • The work to be done and the materials to be used to insulate well
    • Overall insulation of a roof
    • Overall insulation of slate, tile or zinc roofs
    • Insulation of a garage door
    • Overall insulation of the walls from the outside
    • Overall insulation and development of the attic
  • records
    • Ecology: how to insulate your house?
  • Word to the pros
    • The new Isover glass wool

This may interest you


Video Instruction: How to Install Fiberglass Insulation - This Old House