Reed plate

from Wikipedia, the free encyclopedia
Reed plate
origin
raw materials reed
Material properties
Thermal conductivity  λ 0.055 W / (m K)
Specific heat capacity  c 1200 J / (kg K)
Bulk density ρ 190-225 kg / m 3
Vapor diffusion resistance  μ 2
commitment
Areas of application u. a. ETICS , impact sound and thermal insulation in floors, walls and roofs
material costs approx. 10 € / m 2 (50 mm thickness)
x

Reed panels, also called reed insulation panels or reed panels, are a natural insulation material made from the renewable raw material reed . The reed panels are made without chemical additives. The reeds lying parallel to each other are pressed together using mechanical pressure and tied with wire.

Manufacturing

Long, strong reeds are used to produce reed panels, as they have particularly good insulating properties due to the large air chambers in the reed. These are filled into a shaft perpendicular to the production direction. There they are combined to the desired plate thickness (usually 2-15 cm) and held together with wire clips using runner wires made of galvanized metal wire (in some cases also stainless steel wire) arranged above and below. the endless panels are then cut to the desired length (usually 1.25 m).

use

The use of reeds as a building material has been documented since the Neolithic. Reed panels are mainly used for the thermal insulation of buildings. Important areas of application for reed insulation are interior and exterior insulation, roof insulation (under-rafter, above-rafter and between-rafter insulation) and impact sound insulation for ceilings and floors. Due to their rough surface structure, reed panels also serve as plaster bases. As a pure plaster base are reed fabric used.

Insulation boards made of reed are a natural building material and are mainly used in ecological construction . Here they are combined with clay plaster , lime plaster and wall heating in the interior . In the thermal insulation composite system, the insulation boards only need to be dowelled; additional gluing is not necessary.

In earth building , reed mats are used as a plaster base: Since earth plasters do not form a chemical bond with the substrate, mechanical adhesion is of the utmost importance. The reed plates fulfill this function to a great extent.

Reed plates and mats are also used in horticulture. Here they serve as privacy screens and wind protection.

properties

The minimal amount of energy required to manufacture reed insulation boards and their easy, environmentally friendly disposal save resources and the environment and are a good ecological alternative to other insulation materials . Reed insulation boards are the only natural insulation material made from vegetable raw materials that is used completely untreated - it does not contain borates or other chemical additives.

At around 190 kg / m 3, reed insulation boards are relatively heavy insulation materials, the thermal conductivity of the building material classified as normally flammable is usually 0.055 W / (m K) somewhat higher than conventional insulation materials, so a somewhat thicker insulation layer is required for a comparable insulation effect needed. The water vapor diffusion resistance factor is 2 and is therefore in the middle range for natural insulation materials. Reed mats allow room air moisture that has penetrated the insulation to dry off.

Reed insulation mats are suitable for all load-bearing substrates up to a maximum of 2 full floors. Their specific heat storage capacity is 1200 J / (kg K), i.e. higher than rock wool , but lower than most other natural insulation materials. In connection with the high dead weight of the insulation, good summer heat protection is possible. The sound insulation value is given as 23 dB at 5 cm, the flexural strength is approx. 750 N / cm 2 .

swell

  • Gerhard Holzmann, Matthias Wangelin: "Reed" In: Natural and vegetable building materials. Raw materials - building physics - construction. Vieweg + Teubner Verlag, Wiesbaden 2009; Pp. 131-147. ISBN 978-3-83510153-1 .

Individual evidence

  1. ↑ Prices of reed insulation board
  2. ↑ Jörg Brandhorst, Josef Spritzendorfer, Kai Gildhorn, Markus Hemp: Insulation materials made from renewable raw materials , Fachagentur Nachwachsende Rohstoffe e. V. (Hrsg.), 2009, p. 9, PDF Online  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / www.fnr-server.de  

literature

Web links