The core and most important components of the Leno solid construction method are the Leno elements made of various wooden materials. For this purpose, spruce boards are technically dried in modern factories and glued together crosswise with a minimum of three layers. The wooden core is completely torsion-resistant, long-lasting and due to the high degree of drying, it is also resistant to attacks from pests and fungus.
It is also a guarantee for an excellent room climate, moisture diffusion and excellent insulation properties. As it is possible to achieve excellent thermal insulation and storage values even with thin walls, it is possible to gain up to 15% additional living space compared to conventional solid constructions with an identical building area.
Technical data
Dimensions
Lengths: up to 14.80 m (up to 20.0 m on request)
Widths: up to 4.80 m
Thicknesses: from 51 to 300 mm (up to 500 mm on request)
Design: symmetrical (3, 5, 6, 7, 8, 9, 11 or 13 layers)
Weight
~ 500 kg/m3
Type of wood
Grade C24 spruce, PEFC certificated, machine dried, quality graded and dove-tailed
Adhesive bonding
Emission Class E1, melamine resin
Sound-proofing
• Excellent sound insulation as a result of the solid construction method
• Partition max. Rw = 68 dB
Fire protection
• F 30-B up to F 90-B (even non-cladded when certificated pursuant to DIN 4102)
• Partition tested to F 30-B/F 90-B
Resistance to water vapour diffusion
• Water vapour resistance figure μ ~ 60
• sd-Value with element thickness of 8.5 cm, approx. 5.0 m, vapour permeable constructions
without a vapour barrier are standard
Thermal insulation
Thermal conductivity λR ~ 0.13 W/mK
Air tightness
Use of 5-layer constructional element cross-sections in the building shell, joints and reveals must be glued over.
Deformation
• At the board level ~ 0.01% per % timber moisture change
• Vertical to the board level ~ 0.2% per % timber moisture change