Trickle protection
A trickle protection prevents loose particles such as fine sand , dust or fibers from reaching the level below as a result of wind currents, vibrations or component movements from an enclosed component .
In the construction sector, for example, the following materials are used as trickle protection:
- Construction papers such as oil paper and kraft paper
- Construction boards such as felt board and corrugated cardboard
- Nonwovens such as geotextile or PP nonwoven
Waterproof membranes or materials with vapor retardant or vapor barrier properties such as B. PE film and bituminized cardboard or roofing felt are often less favorable from a building physics point of view, as they hinder the transport of water and water vapor.
Trickle protection is typically used in building renovation and timber construction on the intermediate, sliding, false floor or subfloor in the spaces between the joists (joist fields) or on the flooring of a wooden joist ceiling to prevent fine particles of the filler material or leveling material from getting between the joints Insert boards or plates or between the insert and the beams trickle into the floor below.
Sand, perlite , expanded clay , expanded slate , slag , broken clay and other mineral materials are used as fill material in the spaces between the wooden beams, and less often organic material such as husks , flax shives or wood chips . Walking on the wooden beam ceiling and moving furniture creates vibrations that can cause dust particles in the litter to penetrate through fine cracks and cracks.
When filling cavities with more modern materials such as mineral wool , wood fiber insulation , cellulose fibers , coconut or hemp fiber mats, far less dust is introduced into the wooden joist ceiling, so that no trickle protection is usually necessary.
Trickle protection membranes can also serve other purposes or be used for completely different functions. For example, you can:
- Restrict air movements and thereby contribute to thermal protection , as well as prevent the entry or discharge of suspended particles and dust, e.g. B. areas that are difficult to access, such as off-sides, installation shafts and ventilation levels,
- restrict the view and form an optically uniform background, e.g. B. behind lamellar facades ,
- Attenuate sound reflections and improve room acoustics, e.g. B. on suspended ceilings and behind slatted frames ,
- with the appropriate thickness and attenuation, restrict sound transmission and thus contribute to impact sound insulation ,
- if fire-retardant material is used, contribute to fire protection , and
- can generally be used as a separating layer and - if watertight - as a barrier layer (to cover insulation layers before the screed is applied ).
Individual evidence
- ↑ EU Köhnke, ö.buv expert for timber house construction: The fault is always the other person - How does moisture get into a floor separating ceiling? , Magazine Die neue Quadriga , p. 44ff., 4/2012
- ^ Acoustics and trickle protection solutions , Fritz Landolt AG, Switzerland