I am going to lay flooring in the attic that can be walked on and place some moving boxes on. The center-to-center distance between the joists is 120cm, what kind of suitable board is there for this purpose?
15mm ceiling plywood can be used for 120cc, so it should be tested, but it does flex a bit when walking on it.
I think it would be easier with tongue and groove.
How wide are you planning to lay? If it's only a sheet width, the conditions change, of course.
I think it would be easier with tongue and groove.
How wide are you planning to lay? If it's only a sheet width, the conditions change, of course.
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What exists today is a walkway in the middle, about 1.5m wide, 16m long, made from leftover roof boards. The house was built in the 70s, and the thickness of the boards is less than 15mm approximately. They sag considerably, so my idea was to throw out that junk and lay boards all the way, building a slightly wider area of 4x4m over the section where the trusses are supported by the interior walls. But perhaps it would be better to lay boards, maybe 11mm OSB, on top of the existing boards for good load-bearing and purchase similar boards for the larger area and then boards over there as well?
The optimal solution would naturally have been 45x95 longitudinally with 60cc and boards on that, but I would lose so much in ceiling height that it's not an option. But OSB on top of the existing boards doesn't make it worse, does it?
The optimal solution would naturally have been 45x95 longitudinally with 60cc and boards on that, but I would lose so much in ceiling height that it's not an option. But OSB on top of the existing boards doesn't make it worse, does it?
It's a matter of taste, what one can tolerate. Regular rough-cut boards 20-23 mm thick are excellent. Costs about 100 SEK/sqm. Among sheet materials, k-plywood is the best. 12 mm works but 18 mm is better. Avoid 15 and 21 mm as they don't justify the cost increase. The same number of layers as 12 and 18 mm respectively.