I assume 3 4 inch but there are many types brands to choose from.
Attic plywood size.
These openings not only allow mechanical and electrical contractors to.
The many types of plywood can differ in materials number of layers rating and grade.
To give yourself enough space to ensure adequate insulation under the flooring construct a riser of 2 x 4 s in the attic over the existing joists.
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.
The previous homeowner may have simply covered the joists with plywood to use the space for storage.
My attic is located above my garage and currently the former owner had random pieces of plywood placed up there.
What size plywood for an attic floor.
The minimum size for an attic s access.
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 storage you can install inch plywood or.
If the attic were designed as living space those ceiling joists would become floor joists and be much bigger.
Some screwed others not.
Ensuring adequate insulation under the flooring.
This guide will explain the different uses of plywood as well as popular plywood sheet sizes and its rating and grade system so that you can choose the best plywood for your project.
Plywood is a necessity in many diy and construction projects but not every type of plywood works for every project.
While this is not the optimal setup it is acceptable to have ceiling joists covered with plywood or osb to use for light attic storage of dead loads.
Oversizing is an unnecessary expense but you don t want to fall through.
Ceiling joists are typically 2 8 lumber floor joists are usually 2 10 or 2x 12 lumber.
Attic access panels serve as an important safety and convenience feature in the home.
In attics built purely for storage purposes you may find 2x6 ceiling joists or in some cases.
If necessary block around them with plywood or corrugated cardboard to prevent the insulation from piling up on the vent.
Install two by four blocking between joists or wherever needed to support edges of the plywood that do not have support from the bottom.
Cut the plywood into manageable strips about 10 inches wide to make the job easier.
It might seem impossible to haul it up to the attic.
That s a big size and strength difference between the two types of attic joists even if the joist spacing is the same.
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.
