What do class 2 and class 3 mean for 15 mm OSB?
According to the standard EN 300, OSB/2 is a load-bearing panel for dry conditions, while OSB/3 is a load-bearing panel for humid conditions. The 15 mm product offers class 2 with SKU LT-4549 and class 3 with SKU LT-4548. Class 3 does not mean continuous open wetting. For the exact batch, check the marking, declaration, and edge protection instructions.
Is 15 mm OSB suitable for both floor and roof?
The possible application depends on the design scheme, not just the thickness. The floor is checked for concentrated and distributed loads, deflection, and joint support; the roof—for snow, wind, panel orientation, and roofing system. Without a manufacturer’s table, no universal support span can be given. Class 2 or 3 is chosen separately according to moisture conditions.
How does 15 mm OSB compare to 11 and 18 mm panels?
The catalog confirms three different nominal thicknesses, each with class 2 and 3 variants. The thicker panel usually has different stiffness and weight, but exact values depend on the manufacturer and are not published. For substitution, compare the declaration, main axis, support span, loads, and joint detail. Do not replace design 18 mm with 15 mm just because of price.
How many square meters does one 15 mm OSB sheet cover?
This cannot be calculated from the current product record because the sheet’s length and width are missing. The nominal thickness of 15 mm does not give the area. LATIVA must confirm the shape and edge of the specific batch. Then the sheet area is length times width, and the quantity is adjusted for joints, orientation, openings, and cutting.
Where should the joints be placed when installing 15 mm OSB?
For load-bearing use, edges and short joints must be supported or connected according to the system detail; they are not left randomly between supports. Exact installation depends on whether the sheet has a square edge or tongue and groove, which Shopify does not specify. Row staggering, movement joints, and main axis direction are determined by the manufacturer’s instructions and the design.
Can 15 mm OSB/3 remain uncovered outdoors?
It should not be considered a permanent exterior covering just because it is class 3. OSB/3 is for load-bearing use in humid conditions but is not waterproof; prolonged wetting and unprotected edges can cause swelling and damage. The panel is included in a designed package with appropriate protection, drainage, and details. Temporary exposure is checked according to the factory instructions.
