By the middle of the 1970’s the suspended ceiling industry converted from imperial size ceilings over to metric. By the early 80’s very few ceiling fitters were installing imperial ceilings. This has naturally created a problem for the last 30 years in terms of sourcing replacement ceiling tiles to fill voids, rather than change entire suspended ceilings.
The manufacturers reduced production and gradually stocks have diminised with the suppliers and distributors. One or two manufacturers still produce imperial size tiles, so please get in touch as we can help.
Taking the 1200 x 600mm (nominal size) ceiling into consideration, the imperial size was 1210 x 605mm with the metric being 1195 x 595mm.
This size discrepancy created a problem as the new metric size tiles (595 x 595mm) would actually drop through the grid and fall down rather than overlapping the grid and positioning within the ceiling.
The most common imperial size tile is now the 1210 x 605mm, with the most popular product being the old Armstrong Tatra Minaboard (BP755M). The tile has the same directional fissured pattern as the metric version of the popular Tatra.