20 cos (45 Degrees) = 20 times square root of 2 divided by 2 which is about 14.1 mm.
Sep 5th 2008, 12:51 PM
I wish I'd could lay tile, but I can't. So this may be totally wrong.
But I think that you have an isosceles right triangle with hypotenuse 20mm.
So the height of the adhesive bed is that of one leg.
So we get: .
I hope that is correct in tiling, it is in mathematics.
Sep 5th 2008, 01:49 PM
I can sleep now.
I was wrong by the way.