Our premium-quality SWISS KRONO OSB/4 EN300 in a long version with board lengths from 6.501 to 18 metres – the ideal wood-based material for large applications. With its ContiFinish^® finish, this long board made with completely formaldehyde-free binder makes for healthy living, especially in eco-friendly timber-frame construction.

A Harmonised System

On the Services page, you can download a large number of system modules for building new houses and modernising and renovating existing ones with SWISS KRONO products. Click here to go straight to the download section

Greater Efficiency and Cost Savings

SWISS KRONO has a long tradition of developing innovative new products. One such innovation is the production of SWISS KRONO OSB/4 EN300 Longboard with a length of 18 metres. In fact, the SWISS KRONO GROUP is probably the only company in the world able to produce 18-metre-long boards, having invested in a long-board stacking system at its Heiligengrabe, Germany plant.

Builders of prefabricated houses and commercial structures can take advantage of this SWISS KRONO OSB innovation to create large-size wall and roof elements. It also offers producers of prefabricated elements for timber-frame houses new opportunities to increase efficiency and economise. Plus, the new storey-high long boards with a height of 2.8 metres from the SWISS KRONO OSB product family make it possible for a single board to extend the entire length of a building, thus completely eliminating butt joints. This does away with the need to lay plasterboard over it.

Applications

• Commercial buildings and prefabricated houses



		Strand direction
		Major axis			Minor axis
Thickness range [mm]	d	10 - 18	>18 - <25		10 - 18	>18 - <25
Strengh values [N/mm²]
Stresses on board
Bending	fm,k	28,0	23,0		14,0	12,5
Shear	fv,k	1,5			1,5
Plate loading
Bending	fm,k	19,5	17,0		13,5	12,5
modulus of elasticity	ft,k	12,0	10,5		8,0	7,5
Compression	fc,k	14,0	12,5		11,0	10,5
Shear	fv,k	8,0	7,0		8,0	7,0
Stiffness values [N/mm²]
Stresses on board
Bending modulus of elasticity	Ema	6500
Shear modulus	Gra	100			100
Plate loading
Bending modulus of elasticity	Eta	3500			2500
Compression modulus of elasticity	Eca	3500			2500
Shear modulus	Gva	1000		1100	1000
aThe characteristic stiffness values E05 and G05 are calculated as follows: E05 = 0,9 x E and G05 = 0,9 x G *This value is not covered for thicknesses > 25 mm
Genereal and building physics values
Bulk density acc. to EN 323	m	≥ 620 kg/m³
Max. deviations in board thickness **sanded	mm	± 0,4 mm			± 0,4 mm**
Tolerance in length and width		± 3 mm
Perpendicularity acc. to EN 324-2		2 mm/m
Thermal conductivity acc. to DIN EN 13986	λ	0,13 W/mK
Water vapour resistance	sd	≥ 2,0 m (from 12 to 30 mm) - dry (μ x d)
Air tickness acc. to EN 12114 at 50 Pa		0,12 [m³/hm²]
Thickness swelling acc. to EN 317		≤ 9 %			≤ 9 %
Coefficient of expansion for 1% change in wood moisture content		0,015 %
Waste code		03 01 05
Emissions class		E1 – 100% Formaldehyde-free binders (< 0,03 ppm)
VOC-emission / DIBt-Certificate: G-160-18-0001		Compliance with the Health Protection Requirements for Building Structures in acc. with Annex 8 of the German Model Administrative Regulation on Technical Construction Requirements (MVVTB 2017/1)
EPD as per ISO 14025 and EN 15084		EPD-KRO-20150067-IBD2-EN
Service classes acc. to EN 1995-1-1		1 + 2
Reaction to fire acc. to EN 13501-1		D-s2, d0
Declaration of Performance No. acc. CPRs		SKDE_OSB-4_CPR_2020_055

Format [mm]	Thickness [mm]
	9	10	12	15	18	22	25	30	40
6501 mm to 18000 mm				**	**	**

** Minimum Order Quantity one truckload per thickness and format

Special formats and thicknesses on request

Laying and Boarding

• When laid closely with butt joints in interior walls, leave room for expansion where the boards adjoin other structures.

Coating and Varnishing

• SWISS KRONO OSB with a ContiFinish^® surface may be coated with a solvent-containing PU (DD) or synthetic-resin varnish.
• Sanded surfaces may be coated like normal wood (e.g. with varnishes, paints, oils, waxes and glazes).
• It is advisable to apply at least three coats, sanding after the first one.
• Application of at least three coats is recommended.
• The only way to achieve an absolutely smooth surface is to apply filler.

Important Note on Coating and Painting!
When coating SWISS KRONO OSB with oil or hard wax oil, under some circumstances ingredients in the oil may interact with the natural wood resin in the SWISS KRONO OSB. This can result in an intense, lasting odour in the room. We therefore recommend that you contact the manufacturer of the oil or hard wax oil before using it.

Transport and Handling

• Take steps to prevent the boards, and especially the unprotected edges, from absorbing large amounts of moisture during transport and installation. Be careful not to damage the edges when lifting, moving and stacking boards (this applies especially to tongue-and- groove boards).
• Check against the labels or producer’s documentation on-site to make sure that the following are correct: thickness, approved utilisation class, surface (sanded or ContiFinish®) and edge type (square-edged or tongue-and-groove).
• During installation, boards may be briefly leaned against a solid structure at a 70° angle.
• Always carry individual boards in an upright (vertical) position.

Storage

• Protect boards from exposure to significant moisture or very high relative humidity.
• Prevent direct contact of the boards with the floor. Only store outdoors temporarily, and if unavoidable cover stacks with watertight but water-vapour-permeable tarpaulins.
• Always stack boards horizontally on pallets and wooden supports (spaced no more than 600 mm apart).
• Align wooden supports precisely with one another and parallel to the shorter side of the boards.
• Lay the boards so their edges line up (with a maximum overhang of 15 mm).

Acclimatisation

• Precondition boards prior to installation.
• Store boards for about three days under the same climatic conditions that prevail at the installation site.
• This adjustment to the ambient moisture at the installation site will prevent excessive shrinkage or swelling.

Sawing, Milling, Sanding and Drilling

• SWISS KRONO OSB can be sanded, sawn, milled and drilled just like solid wood and using all of the same tools.

Nailing, Stapling, Screwing and Gluing

• SWISS KRONO OSB can be attached to wooden studs and rafters using screws, nails or staples.
• Use in accordance with the official approvals and standards (Z-9.1-618, Z-9.1-503 and DIN 1052 in Germany as well as EN 1995-1-1 (EC 5)).
• Additionally bond or glue tongue-and-groove joints.