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.
Attic walkway plywood.
We normally recommend that you place plywood over the top of the rafters creating a walkway to the a c and in that area only lay in one or two layers of unfaced fiberglass blanket on top of the plywood walkway and around the ac unit itself.
Ensure that the end of the first plywood sheet lands on a piece of 2x leaving enough room to position the.
The first plank is placed at the entrance of the attic walkway on the first horizontal chord.
Apply construction adhesive on one side and place it on the horizontal chord.
Continue the process until the flooring is finished.
The intent is to lay down the boards and the ends should attach to a ceiling rafter.
After that screw it in place using the 2 inch deck screws.
The thinner plywood is acceptable when the joist spacing is 16 inches.
I would not feel right about walking on the fiberglass but for all i know it could be ok.
A 4 foot long plywood strip will need at least 8 screws on it.
The surface itself just has to be strong enough to handle your weight along with tools and gear.
An attic walkway doesn t have to be pretty or expensive.
The plywood should be laying on top of the subfloor with no overhang.
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.
We used leftover plywood scraps to build ours an attic walkway also needs enough support.
1 2 plywood or osb should be enough in my non pro opinion.
Some people extend the wood up on 2x2s across the rafters to clear insulation but care would be needed to prevent that from slipping.
Place the first plywood sheet on top of the 2x structure starting by the attic entrance.
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.
Plywood is lighter to carry which is good.