I am building a 8x12 playhouse and am planning to install 3/4" plywood subfloor. I am following a book for plans & directions. Now, I would have installed the 3 8x4 plywood sheets one next to the other (8ft dimension of plywood aligning to the 8ft side of shed) to cover the
8x12 area.However the book suggests to cut one of the sheets into half (4x4) and then use one 4x4 and then an 8x4 (8 ft dimension of plywood aligning with the 12 ft side of shed) on one side, and reverse on the other (ie. first the 8x4 and then 4x4).
I am sure there is a good reason for it, but it does not say why. Could someone explain?
Also, what kind of tolerances are "acceptable" when building something like this? That is, if the size of floor or walls is within 1/8" inch it is OK or 1/4" inch etc. Is there any particular dimension that needs to be more exact (e.g. height of walls has to be more exact than size of floor)?
Thanks
AK