Of the two most common subfloor materials builders often debate which is best.
Best attic subfloor.
The decision regarding the thickness of plywood to use for the subfloor in the attic has a lot to do with how you intend to use the attic and it also depends on the spacing of the ceiling joists.
Osb oriented strand board is a different form of sheet material.
The most common uses are as sheathing in walls flooring and roof decking.
An attic conversion is a great way to expand your home s living space but best to leave the work to a licensed contractor.
Plywood or chipboard is the least expensive option for storage flooring.
Apa rated subfloor panel osb is a material with high mechanical properties that make it particularly suitable for load bearing applications in construction.
Weight concerns if you do have an existing walk up attic with traditional floor framing the principle concern when converting the space into a living area will be weight.
Since the boards are sold in 4 foot by 8 foot sheets you may need to cut them into 2 foot wide strips to get them into the attic space.