OSB plate, its review and application.
One of the relatively new materials in our market, which appeared relatively recently (6 – 8 years ago), is the oriented – strand board or known by its English acronym as the OSB which replaced the familiar to all chipboard sheets. The main feature of the new material is that the outer layers of chips are oriented along the plates, while the interior layers are oriented crosswise. This feature makes the OSB somewhat similar to plywood, since the perpendicular orientation of layers of the material provides improved strength of the boards with a relatively small weight.
OSB 3 — oriented strand board.
OSB panels are made from large chips by bonding with waterproof formaldehyde-based resins and compression using special equipment at a high temperature. Just like marine plywood, moisture resistant wooden sheets is widely used in construction and repair works. Depending on the operating conditions and the strength requirements the oriented – strand boards are made in three classes:
- OSB 1 is used in dry premises; it is not used in load-bearing structures;
- OSB 2 is used for the supporting structures in not very-wet premises;
- OSB 3 is used for load-bearing structures in wet rooms and outdoors.
OSB features: it’s advantages and why it is so popular.
For plates manufacturing are used small chips or shavings of the average length of 70-150 mm, 10-12 mm wide and 0.5 – 0.8 mm thick. The external layer is glued with melamine-formaldehyde resin, and the inner layer is glued with urea-formaldehyde or phenol-formaldehyde resin. These resins are non-toxic, and are recommended for interior residential premises. For interior works is used the eco-friendly resin based on methylene diphenyl diisocyanate. Wood-based panels for the construction of frame houses are simply irreplaceable, because they are easily handled (drilled and cut), are lightweight, and easy to fix with conventional nails and screws. Plates are glued with ordinary joiner’s glue and easily painted b with any building paints. If you use moisture resistant wooden sheets for the walls and floor, given the ease of processing, the construction of frame houses takes literally a few days.
Moisture resistant OSB – a universal solution for construction.
For the construction of exterior walls of houses, or the use in wet areas the moisture-proof plates boards are used (according to the standards this is OSB 3, which, although more expensive than boards of classes 1 and 2 still less expensive than the moisture resistant grades of plywood). The largest manufacturer of building boards in Europe is the Kronospan, the Austrian company, which plants are located all over Europe. Today the branch of the Kronospan in Riga is the largest in Eastern Europe. In Riga, construction plywood and particle board can be had in many construction and DIY stores, but when selecting features of a particular type it is important to pay attention to the availability of certificates of origin and quality certificates.