To insulate a wall against cold and sound

Damming a wall takes into account noise and temperatures. Sound insulation is particularly important for interior walls and cold insulation plays the biggest role in exterior walls. In the implementation and implementation, the insulation performance of a wall of wall material and mechanical structure is composed.

Exterior and interior insulation

On almost all walls, insulation can be mounted from two sides or located in the middle wall body. When doubling the wall and new buildings, the insulation of the wall can be planned and implemented at all three positions.

In existing walls often decides the effort and their function on the most advantageous dams. The most costly is the application of an external insulation, removed for the cladding as plaster and later reapplied. When sealing the wall from the inside there are structural limits with respect to the effectiveness of Dämmmaßnahme.

Potential vulnerabilities

If a wall is or is made in sufficient thickness and the appropriate bricks, it usually already has good substantial insulation values. However, typical weak points can limit the area insulation. The neuralgic wall parts include:

  • Window with window sill, roller shutter box, lintel and frame
  • Doors with lintel and frame
  • Anchors and connections with other walls
  • Wandabzweigungen
  • Cold bridges caused by foreign components such as beams
  • Sound bridges through cavities
  • Butt joints between the insulation elements

Materials and methods of insulation

In simple terms, it is possible to mount on one wall directly on one side insulation material to create a two-shell system with another level and additionally exploit by thermal ventilation thermal insulation effects.

Common are combinations of several layers of different insulating materials in a composite system. The insulating core material used is panels or wool made of different materials:

  • Styrofoam or polystyrene
  • fibreboard
  • Mineral wool such as rock wool
  • glass wool
  • Hemp or flax as wool or pressed
  • Foam boards made of plastic
  • Calcium silicate boards
  • cork

Additional layers are needed around this core material. To the wall either an adhesive layer or a substructure is attached. Depending on the wall layer, a reinforcing fabric is applied to the visible surface as a plaster base or a lining. A vapor barrier, usually in foil form, is laid in the direction of the interior below.

Diffusion and moisture

Every insulation on a wall requires a balance between the insulation effect and the moisture balance. Since many walls are exposed to different temperatures and changing humidity, air-tight sealing quickly leads to masonry sweating or condensation.

The interior surfaces need a vapor barrier to prevent moisture from entering the wall. At the same time, however, these films can also bind moisture in the wall or masonry and lead to waterlogging. The individual situation Each wall must be individually insulated according to these aspects.

Tips & Tricks

If you want to insulate a "noisy" wall to the neighbors, you can already achieve good effects with less complex measures. Thicker wallpaper made of cork, for example, absorbs a lot of sound.

Product Image: Dmitry Kalinovsky / Shutterstock

Video Board: Insulated floating walls for sound and temperature control in brick and concrete buildings