What Size Plywood for Roof and Construction

‘What size plywood for roof’ is such a common question for roofing installation. A lot of homeowners prefer to use plywood as the main roofing material.

Plywood has many advantages, including the beautiful and rustic look, more flexibility of its usage, and surely the more affordable size. Find out information about the size of plywood for roofing below.

Understanding Standard Size for Roofing Plywood

When choosing plywood as roofing material, you need to know the standard size for sure. However, you also need to figure out the thickness as well. Figure out the answer of what size plywood for roof and its thickness as well on this particular list.

What Size Plywood for Roof

1. The Standard Size

In most manufacturers and brands, plywood sheet for roofing comes in the size of 4×8 inches. This is like the very common size and you will find a lot of different types of plywood adapt this particular size as well. So, the answer to the question of what size plywood for roof is around 4×8 inches.

2. The Standard Thickness

If you purchase the 4×8 inches plywood, the thickness will be around 5/8 to 3/4 inches. It will all depend on the grade of the plywood. As we know, plywood grade is divided into four kinds: grade A, grade B, grade C and grade D.

The finer the grade, the thicker the plywood is. A-grade plywood sheet usually has that standard ¾ inches flat roof plywood thickness.

3. Factors to Consider

These are some factors to consider when you choosing the plywood size for the roofing. Consider them before buying any plywood sheet.

  • The Design of the Roof

There are two common designs for roofing: flat roof and steep roof. Each design requires different types of plywood sheet as well. The steep roof has to be filled with smaller plywood sheet with tighter gap. The flat roof is great enough for the standard-sized plywood and it requires regular gapping as well.

Read also : Flat Roof Types – Guide

  • Rafter Spacing on the Roof

Of course there will be rafter on every roof and the spacing between the rafter and the roof is going to determine the size of the plywood sheet. The closer gap between the rafter and the roof requires larger plywood size to prevent leaks.

  • Expected Roof Load

Roof will have load at some points. Build-up snow, dirt, debris and dry falling leaves will pile up and become a burden to the roof. If this load is expected to be very heavy, select bigger size of plywood sheet and the thickest one.

You know it is when to replace plywood on roof if the burden is getting heavier and heavier.

It is never easy to install your own roof, even when you use the lightest, most flexible material like plywood. This is why professional helps are always needed here.

To cover like 1,500 square feet roofing, you will need many, many of the plywood sheet. This is why after understanding ‘what size plywood for roof’, you better call someone professional to do the installation.