Are all boards manufactured and marked to British Standards?
No! The plywoods used in Britain are predominantly imported. Softwood Plywood marked “EXTERIOR” from North America conforming to the national product standards of Canada and the USA, which has been subjected to recognised independent third party quality control, is deemed to comply with the bond requirements of WBP as set out in BS:6566. What about marks on plywood from Europe, Asia, Africa and South America? When specifying it is important to emphasize that as a minimum all boards shall be marked with the type of glueline (e.g. WBP, EXTERIOR, TYPE 1, CBR, MR, INT). The UK trade is pressing all manufacturers to properly mark boards with the glueline, thickness of board and the grade of board (i.e. face/back veneer). Some manufacturers do not always do so or respond to requests not to properly mark each board. It is essential that the correct plywood glueline type is specified and that this can be ascertained by reference to a proper mark on the board. In is in the interest and safety o
