Hemp/jute fibre mats

Insulation boards

WLS 007 vacuum plates
Phenolic resin sheets WLS 020-023
Polyurethane panels WLS 022-030
EPS panels WLS 032 – 040
XPS boards WLS 033 – 040
Rock wool boards WLS 035 – 040
Softwood fibreboards WLS 040 – 046
Foam glass panels WLS 036 – 050
WLS 042 mineral insulation boards
Calcium silicate boards WLS 062
Glass wool panels
WLS 035 rock wool internal insulation board

Mats for thermal insulation

Aerogel mats
Glass wool mats WLS 032 – 035
Rock wool mats
Hemp/jute fibre mats
Jute mats
WLS 040 sheep’s wool insulation

Loose-fill and blow-in insulation materials

WLS 033 blown-in EPS insulation
SLS blow-in insulation WLS 040
WLS 035 blown-in glass wool insulation
Blown-in rock wool insulation WLS 035 – 038
WLS 039 blown-in cellulose insulation
WLS 040 wood fibre blow-in insulation
Neptun Ball Fibre Blown-in Insulation WLS 046
WLS 045 expanded perlite loose-fill insulation
Straw blow-in insulation WLS 047
Calor Blown-in Insulation WLS 051
Insute 25-pro WLS 028

Speciality products

WLS 027–030 polyurethane spray and cast foam
Clay-based insulating foam WLS 035
Aerogel Insulating Plaster WLS 030
Hemp/jute fibre mats

Features

Hemp and jute fibre mats provide insulation against heat, cold and sound. Thanks to their high absorbency, they also help to regulate humidity. Their main area of application is internal insulation. They can be used for insulation between, above and below rafters, as well as for insulating timber-beamed ceilings, external and internal walls in timber-frame and timber-stud construction, metal stud walls, cladding, external wall insulation between a load-bearing structure, insulation on non-accessible but reachable top-floor ceilings, cavity insulation between joists in floor structures and similar substructures. Hemp insulation materials are now only available in combination with, for example, jute fibres

Raw materials and manufacturing processes

Raw materials: hemp fibres, Biko fibres or maize fibres, soda or ammonium phosphate

Hanf-/Jutefasermatte

Technical Specifications

Property

Unit

  Parameters

  
Thermal conductivity λB   W/(mK)    0.041   0.042   0.047
Bulk density ρ   kg/m³    39   24   40
Heat capacity c   J/(kgK)    2300   1600–1700   1700
Building material class   --    B2   B2   B2
Water vapour diffusion resistance μ   --    1–2   1.9   1–2
Primary energy content   kWh/m³    48–67   40   64
Water-repellent effect   --    no   no   no

*Comparative U-value: 1.0 W/(m²K)

Waste disposal and recycling

If reuse is not possible, mats containing soda and maize fibres can be composted. Hemp fibre mats containing Biko fibres, on the other hand, cannot be composted. In this case, thermal recovery is a suitable option. Hemp-jute mats consist of 66% hemp fibres, 22% jute fibres, 8% PET-based polymer support fibres and 4% soda

. Availability:

The product is not available on the German market.

Zulassungen und Regelungen

ETA-05/0037 

Health and the Environment

Hemp is a native plant, meaning that transport distances between the farm and the processing facility are short. There are products on the market that contain no chemical ingredients whatsoever, being made from biofibres. Mats made from soda and maize fibres can even be composted. The product is therefore harmless from an environmental point of view. Nor are there any known health concerns.

Advantages
  • partially compostable
  • sound-insulating
  • summer heat protection
  • several manufacturers
  • moisture-regulating
Disadvantages
  • some of which contain biofibres
  • relatively expensive
  • medium insulation value