On new construction, what is the proper way to install the exterior OSB wall sheathing?
Should I go for a perfectly level sheet install, and then level each corresponding sheet or is it better to just follow the edge of the sill plate and end up with potentially non-level panels due to the foundation not being floated perfectly?
I have also considered snapping a chalk line after measuring 47 and 3/4" from the sill plate on each end of the house, but that chalk line would be extremely long and would vary too much in that span.
I am trying to maintain:
- An even 1/8" gap between each sheet
- The same height of sheet as the next one to prevent unequal gaps on the 2nd row of sheeting, and
- Keep the sheathing flush with the bottom of the sill plate so it ties into the sill plate nicely with the edge nailing pattern. This has amounted to nothing but frustration and curse words.
Best Answer
The code allows 3 basic configuration: 1) Configuration 1: long edge of panels installed horizontally across supports and each succeeding course staggered 1/2 panel LENGTH, 2) Category 2: long edge of panels installed horizontally and each succeeding course staggered 1/2 width of SHORT edge, and 3) Category 6 (I know, stupid numbering system, but Categories 3, 4 and 5 are just for loading from opposite direction.) Long edge of panels installed horizontally across supports and each succeeding course NOT staggered.
Most installations are Category 1, but the critical criteria in all categories is that the panels MUST fully meet (lap) the sill plate, both top plates and 1/2 of stud at ends. (Please stagger nailing into studs where the panels end, to avoid splitting of stud.)
This doesn't tell you HOW to do it, but I hope it tells you WHAT you need to do...and I think your question was asking HOW...
By the way, if you are using staples, the crown must be PARALLEL to the long dimension of the supports.