Insulate and insulate basement ceiling - basement ceiling insulation with rock wool

Insulate and insulate basement ceiling - basement ceiling insulation with rock wool: ceiling

A basement ceiling insulation unfortunately still consider many homeowners unnecessary. It is right there in old buildings a lot of energy saving potential.

If you want to insulate and insulate the basement ceiling, the costs will quickly pay for themselves, as with a Energy savings of 5 to 10 percent is to be expected.

So that in the insulation of the basement ceiling no error In our guide, we explain how the basement ceiling insulation is carried out correctly. We distinguish between the following variants:

  • Stick insulation boards directly to the ceiling
  • rafter insulation

Low energy consumption with proper basement ceiling insulation

The basement ceiling insulation is only part of the thermal insulation from the inside. In order to be able to ensure an effective energy saving, one should complete insulation of the house be made.

Despite its important function, a basement ceiling insulation is estimated to be missing in 90% of all German households. This is especially true of houses built before 1995. Because only in that year entered the EnEV law (the so-called heat law) into force, in which the outside perimeter insulation of the bottom plate and the basement was prescribed. Due to the lack of thermal insulation between the heated rooms on the ground floor and the basement, heat is constantly lost through the soil.

The thickness of the insulation depends on the height of the ceiling. The thicker the insulation gets, the lower the ceiling will ultimately be. Nevertheless, it should be at least 6 cm thick to achieve an effective energy cost savings. Ideally, its thickness is up to 12 cm.

Preparation for the insulation of the basement ceiling

Insulate and insulate basement ceiling - basement ceiling insulation with rock wool: insulation

The insulation must be cut to size before further processing.

For one Rafter insulation is suitable rock wool, It is flame retardant, so it does not burn in the event of a fire. Instead, this insulation only glows without smoke. This gives the homeowner or the fire department enough time to extinguish the fire before it can spread to other rooms. At the same time rock wool serves as noise protection.

Polystyrene plates can be easily stuck directly to the ceiling. The direct bonding has the advantage that the individual insulation boards can be placed directly together. This avoids thermal bridges in which heat escapes through the interstices to the outside and is lost. When gluing, only use solvent-free adhesive. Construction adhesives or assembly adhesives are best suited.

Before the insulation will the basement ceiling checked for its condition. If it's smooth, you just have to test if the blanket needs pretreatment. To do this you run your finger over the ceiling. If traces of paint remain on the fingers or even limescale the paint, the ceiling must be thoroughly cleaned and primed before insulation - eg. B. with primer.

A Primer is necessary even then when the ceiling is sanding or the paint is already bursting. In such a case, you should first brush the ceiling with a stiff brush or broom to remove any loose components before priming. Then the primer can be applied to the ceiling.

Stick insulation boards to the ceiling

In the first step, the Ceiling cleaned and completely freed from impurities and dirt become. Then the construction adhesive can be touched. In the amount and the mixing ratio, it is best to follow the manufacturer's instructions.

If the ceiling is flat and has no bumps, you can Apply assembly adhesive over the entire surface of the insulation board. Recommended is a tooth trowel (10 x 10 mm) to comb through the mass. The edges of the plates are not covered with glue.

Ceiling suspension with simultaneous insulation

If you want to insulate the basement ceiling with a slatted structure, it must be considered that the whole ceiling is simultaneously suspended by the procedure. This method of insulation is therefore recommended only for high cellar ceilings. It is also decisive whether a slat construction is already present or not. If not, the slats in the width of the insulation boards must be doweled parallel to each other to the ceiling.

Hang cellar ceiling

  • drilling machine
  • dowel
  • screw
  • float
  • notched trowel
  • adhesive filler
  • mortar bucket
  • mixing paddle
  • insulation boards
  • Vapor barrier film
  • Slats for slat construction
  • Ceiling covering (panels, plaster or wood panel)

Insulate and insulate basement ceiling - basement ceiling insulation with rock wool: insulation

After the insulation, the ceiling can be disguised

Then you press the insulation into the spaces. If the layer of the slat row has been completed, it must a so-called counter battens be attached, d. H. The other rows of slats are mounted transversely to the first battens. This slat row is filled with the insulating material.

Should the ceiling under an unheated room lie - such. B. a garage - you lay out last still a vapor barrier film. This layer prevents the penetration of moisture into the insulation layer. Finally, slats and insulation are covered with a ceiling paneling. Well suited are panels, gypsum or wood panels.

design options

The options available after the basement ceiling has been insulated depend on how much money is invested and what material is to be used. If you do not want to use wood panels or plasterboard to cover the basement ceiling, you can on paintable insulation boards be resorted to. After processing, the panels can be painted over with a good opaque color. In addition, they can be repaired for minor damage with a little putty.

Prevent mold in cellar insulation

Many homeowners assume that cellars are not suitable for insulation due to the high humidity. They fear that mold forms on the wall behind them. However, this concern is unjustified. It only has to be ensured that the insulation used is permeable.

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Video Board: How to Soundproof Ceilings Between Floors