Once you re done laying down all of the plywood your attic floor is finished.
Attic walkway plywood.
The plywood should be laying on top of the subfloor with no overhang.
Place the first plywood sheet on top of the 2x structure starting by the attic entrance.
The thinner plywood is acceptable when the joist spacing is 16 inches.
An attic walkway doesn t have to be pretty or expensive.
After that screw it in place using the 2 inch deck screws.
If you plan to finish the floor in the attic and turn the room into a living space however you should always use 3 4 inch.
The surface itself just has to be strong enough to handle your weight along with tools and gear.
The previous homeowner may have simply covered the joists with plywood to use the space for storage.
Attics with existing flooring alternatively your attic may already have some sort of floor but this doesn t necessarily mean you can build rooms.
Apply construction adhesive on one side and place it on the horizontal chord.
No matter what the spacing is on your ceiling joists 3 4 inch plywood should be used if you plan on walking on it.
Once the boards are in place place more screws placed 16 inches 40 64 cm apart to hold the plywood to the subfloor frame.
Ensure that the end of the first plywood sheet lands on a piece of 2x leaving enough room to position the.
Continue the process until the flooring is finished.
A 4 foot long plywood strip will need at least 8 screws on it.
If you plan on placing the plywood around the perimeter of the opening or door and using it only to store light boxes or materials 1 2 inch thick plywood should suffice.
The intent is to lay down the boards and the ends should attach to a ceiling rafter.
Installing attic flooring for light storage only if your attic joists won t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light.