What panel products are
Panel products are made by breaking timber down and reassembling it. The finer the breakdown, the more uniform the properties across the surface — and the less remains of the original timber character.
OSB stands for Oriented Strand Board. Long, flat strands are laid in oriented layers and bonded. In the face layers they run along the panel, in the core across it. That gives high stiffness in the main direction at a manageable price.
Structural plywood consists of several crosswise bonded layers of rotary-cut veneer, mostly softwoods such as spruce, pine, Douglas fir or hemlock. The crosswise build-up makes it very dimensionally stable and load-bearing in both directions.
Alongside these come chipboard for fit-out and laminated veneer lumber, where the veneers run predominantly parallel to the grain, producing pronounced capacity along the length.
In practice, panel products almost always work alongside other ranges: they sheathe a stud frame in structural timber, serve as boarding over glulam beams, or sit as a dry screed substrate on cross-laminated timber floors.
Advantages
- Large formats. Surfaces are created in a few operations instead of many single pieces.
- Uniform properties. No knots, no defects, no surprises when cutting.
- High bracing effect. As sheathing they turn a stud frame into a load-bearing diaphragm.
- Inexpensive, OSB in particular relative to area.
- Quick to work, cut with ordinary tools.
- Plywood spans in two directions and stays exceptionally stable.
- Various moisture classes available, from dry interior to occasionally damp applications.
Drawbacks
- Edges swell. Once water enters a cut edge, the thickening is permanent — it does not go back on drying.
- Adhesive content. Depending on panel type and emission class, an issue for interiors and for end-of-life separation.
- Limited appearance. OSB has a character of its own that has to be liked; it does not look refined.
- Heavy. Large formats are hard to move alone.
- Tool wear. Adhesives blunt saw blades and cutters far faster than solid timber.
- Dust when cutting, finer and more troublesome than with solid timber — extraction is part of the job.
- Plywood is considerably more expensive than OSB and only worth it where its properties are needed.
- Screw holding power in the edge is limited; connections must be designed accordingly.
Applications
- Sheathing and bracing in timber frame construction
- Roof and wall boarding
- Substrates for dry screed and floor build-ups
- Formwork in concrete construction
- Furniture carcases and back panels
- Exhibition, shop and interior fit-out
- Packaging and crate construction
- Load-bearing panel duties in plywood or LVL, where solid timber would be too variable
Where to avoid panel products
- Weathered components. Even moisture-resistant bonded panels are not made for permanent weathering.
- Ground contact and splash zones. The edge is always the weak point.
- Unprotected cut edges in damp environments. Whoever cuts must protect the new edge again.
- High-quality visible surfaces. Where grain and feel matter, the route leads to solid timber or veneered panels.
- Rooms with strict emission requirements, unless the panel class matches.
- Components with high edge loading, such as heavily stressed fixings in the end face.