Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot.
Roof plywood thicknesses mixed.
Metal roofing thickness recommendations that include paint.
For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended.
The standard width is 4 feet.
Rafters that are slightly farther apart might require inch or 5 8 inch thick plywood.
When this is the case experts recommend a 5 8 inch thick sheet.
Please understand that recommended metal thicknesses will vary based on the design and engineering of the metal product being considered that said here are a few general recommendations.
Exposed fastener corrugated steel roofing.
It will support roof.
A 1 2 sheet is actually 15 32 thick.
Many homes have rafters that are even wider at 24 inches apart and will require a thicker sheet of plywood.
You might be tempted to choose a inch thickness although it s unnecessary in most cases.
These recommendations are with paint.
Keep in mind that the load of the roof still plays a role in the plywood thickness.
The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that.
It s the standard for spacing of 24 inches in the rafter although as mentioned a 5 8 inch thick is more ideal.
Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.
With edge support and the same snow load 3 8 inch osb can be used.
You can get plywood sheets with a length of up to 10 feet.