OSB BOARD 6mm 2500X1250
The photographs are for illustrative purposes only.
| Package dimensions | 250,00 x 125,00 x 0,60 cm |
| Net weight | 12,150 kg |
6 mm OSB/3 Panel — 2500 x 1250 mm Lightweight Structural Sheet
Engineered thin OSB designed for applications where low weight and precision matter. Built from cross‑oriented wood strands bonded with moisture‑resistant resins, the panel offers dimensional stability and a smooth surface ready for finishing — features that deliver clear benefits for contractors and DIY users.
Key Benefits
- Moisture‑resistant bonding suitable for humid conditions
- Superior dimensional stability compared with traditional plywood
- Smooth, uniform surface that is easy to paint or finish
- Flexible 6 mm thickness without sacrificing OSB/3 toughness
- Consistent engineered panel quality for reliable use
Lightweight yet durable construction for easy handling
Applications
Suitable for a range of building and finishing application uses.
- Furniture backing
- High‑quality packaging
- Industrial contracting projects
- DIY and creative projects
Wall sheathing
What to Consider When Choosing
- Choose 6 mm thickness for flexibility where a thin panel is needed
- Check surface finish if you plan to paint or apply veneers
- Verify sheet dimensions (2500 x 1250 mm) and handling weight
- Note the panel's moisture‑resistant resin features for wet environments
Match the OSB/3 grade to humid condition requirements
Specifications
- Dimensions: 2500 x 1250 mm
- Grade: OSB 3 (Humid conditions)
- Density: ~640 kg/m³
- Total weight: 12.15 kg
- Package measurements: 250.00 x 125.00 x 0.60 cm
Thickness: 6 mm
Why Buy from SityPro
- Transparent price information and straightforward ordering
- Reliable delivery options to Estonia and Finland
- Support for contractors and DIY customers on product application
- SityPro offers convenient ordering and professional service
Easy to buy online with clear product features listed
Description provided by sitypro.com
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Frequently asked questions about the OSB board 6 mm 2500 x 1250 mm
What is an OSB board and what is it made of?
OSB (Oriented Strand Board) is a multi-layer sheet material made from softwood strands bonded with synthetic resins under high pressure and temperature. The board consists of 3 layers: in the outer layers the strands are oriented longitudinally (along the board length), in the inner layer — transversely. This cross-oriented structure provides high strength and dimensional stability.
What is the difference between OSB-1, OSB-2, OSB-3 and OSB-4?
Classification per EN 300 standard: OSB-1 — for dry conditions, non-structural (furniture, packaging). OSB-2 — structural use in dry conditions, interior only. OSB-3 — structural use in humid conditions, the most widely used type in construction. OSB-4 — structural use under high load and humid conditions. The 6 mm 2500×1250 board at Sitypro.com belongs to OSB-3 class.
Where is 6 mm OSB board used?
6 mm OSB is a thin sheet intended for lightweight constructions without significant loads: internal cladding of stud walls and partitions, rough substrate under finishing materials, backs of cabinets and case furniture, decorative panels, packaging crates and pallets, temporary site hoardings. For load-bearing floors, roofing and external cladding, thicker boards are recommended — from 12 mm upwards.
What are the technical specifications of OSB-3 6 mm?
Sheet size: 2500×1250 mm (area 3.125 m²). Thickness: 6 mm. Bending strength (main/side axis): 22/11 N/mm². Modulus of elasticity (main/side axis): 3500/1400 N/mm². Tensile strength perpendicular to plane: 0.34 N/mm². Swelling after 24-hour water immersion: not more than 15%. Density: approximately 600–650 kg/m³. Sheet weight 6 mm 2500×1250: approximately 11–12 kg. Standard: EN 300:2006.
How does OSB-3 differ from plywood and chipboard (MDF/particle board)?
OSB-3 vs plywood: OSB is cheaper, less prone to edge delamination, but has a rougher surface that takes paint and lacquer less well. Plywood is stronger in bending and better suited for finishing applications. OSB-3 vs chipboard: OSB is significantly stronger and more moisture-resistant — chipboard crumbles on contact with water and holds fixings poorly at edges. OSB holds screws and nails 10 mm from the edge without splitting. For structural and load-bearing applications, OSB-3 is the optimal price-to-performance choice.
Can 6 mm OSB be used on building exteriors?
OSB-3 is permitted for use under conditions of temporary atmospheric moisture exposure, but is not designed for permanent contact with precipitation. When used externally, the board must be protected by a finish coating (render, ventilated facade, cladding). 6 mm is a very thin sheet, so for external cladding of timber-frame houses, OSB-3 from 9 mm and thicker is used. Board edges must be treated with moisture-resistant paint or sealant.
How do you cut 6 mm OSB board at home?
6 mm OSB is easily cut with standard woodworking tools: circular saw (chipboard/plywood blade, 40–60 teeth) — the cleanest cut; jigsaw — for curved cut-outs; handsaw — for small tasks. Cutting produces a lot of dust — work with a respirator and goggles. Use a guide rail for accurate straight edges. Cut edges should be treated with moisture-resistant paint, especially for exterior applications.
How to fix OSB to the frame — nails or screws?
Both options are acceptable. Nails (ring-shank or spiral, length at least 2.5× board thickness, i.e. for 6 mm — at least 50 mm) — faster for large volumes, used with a nail gun. Wood screws (3.5×45 mm for 6 mm board) — better for demountable constructions. Fixing centres: at edges — 150 mm, at intermediate studs — 300 mm. Minimum distance from board edge — 10 mm.
Should a gap be left between OSB sheets during installation?
Yes — it is essential. Wood-based panels expand with changes in moisture and temperature. A gap of 3–4 mm should be left on the long side and 2–3 mm on the short side between sheets. Around the room perimeter (at walls), the gap should be at least 10 mm. If gaps are not observed, the sheets will push against each other when expanding — this causes surface buckling and cracks in the finish. Gaps are then filled with flexible sealant.
Can OSB board be painted and varnished?
Yes — OSB takes paint and varnish well. Before applying paint or lacquer, the surface must be sanded (P80–P120 sandpaper) and primed with acrylic or alkyd primer. The shiny surface of OSB is not a lacquer coating — it is the result of resin polymerisation during pressing. When preparing for wallpaper, the surface is filled with polymer wood filler. OSB should not be painted with standard emulsion paints without prior priming — it will absorb water and swell.
Is OSB board environmentally safe?
OSB is manufactured using synthetic resins (phenol-formaldehyde, MDI or PMDI), however modern manufacturers produce boards to emission class E1 and even E0 — meaning minimal formaldehyde release, safe for residential use. E1-class boards comply with European standard EN 13986 and are approved for use in residential construction. When purchasing, it is worth confirming the emission class with the supplier.
How do you calculate the number of 6 mm OSB sheets for wall cladding?
Area of one sheet 2500×1250 mm = 3.125 m². Calculation method: 1) measure the total wall area (height × length); 2) subtract the opening areas (windows, doors); 3) divide by 3.125 — this gives the number of sheets; 4) add 5–10% for cutting waste. Example: 12 m² wall ÷ 3.125 = 3.84 → 4 sheets + 5% allowance = 5 sheets. Also account for sheet layout: staggered jointing may increase waste.
How should OSB sheets be stored correctly on a construction site?
Boards are stored flat on even timber bearers (pallets) in an enclosed space or under a shelter protecting from direct rain. Storage directly on the ground is not permitted — the boards absorb moisture from below. When stored outdoors, cover with a waterproof sheet, leaving gaps for ventilation. Before installation, boards should be acclimatised in the installation environment for at least 48 hours.
Is 6 mm OSB suitable for SIP panels and timber-frame construction?
OSB-3 is the standard structural material for timber-frame construction. However, a 6 mm board is too thin for load-bearing wall sheathing in a timber-frame house — the standard for external OSB sheathing in frame construction is 9–12 mm. 6 mm is used only for non-structural internal partitions, decorative cladding, or as the face layer of SIP panels in combination with polystyrene insulation. For load-bearing frame walls, choose OSB 9 mm or 12 mm.
How to order OSB panel 6 mm 2500×1250 from Sitypro.com?
OSB panel 6 mm 2500×1250 is available at sitypro.com in the section "Building Materials — Timber and Board Products — OSB Boards". Delivery throughout Estonia. For availability enquiries, calculating the number of sheets needed for your project, or advice on choosing the right OSB thickness, contact us at +372 536 16980 or via sitypro.com.
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