Understanding Plywood Thickness for Roofing

A lot of people often ask about plywood thickness for roofing. Plywood is not a really popular choice when it comes to roofing. Many homeowners still prefer to use the good old-fashioned clay shingles or metal roofing for the job.

Plywood Thickness for Roofing

However, if you choose plywood, you have to understand the minimum thickness of the roofing purpose. The full information about it is explained below.

Read also: How to Repair Granular Loss on Roof

Plywood Thickness for Roofing

A lot of people often ask about roof decking and plywood thickness for roofing. Plywood is not a really popular choice when it comes to roofing. Many homeowners still prefer to use the good old-fashioned clay shingles or metal roofing for the job.

However, if you choose plywood, you have to understand the minimum thickness of the roofing purpose. The full information about it is explained below.

  1. Lightweight

Plywood is considered lightweight, especially when compared to metal roofing or clay shingles. They add fewer burdens to the house’s structure, and they will help keep the roof together for a longer time.

  1. More Affordable

Among all types of roofing material, plywood is probably the cheapest one. It is because plywood is like a recycled timber material with great quality, but it is widely available worldwide. It makes the price really cheap and more budget-friendly.

  1. Flexible in Design

Plywood is better when it comes to design. It can be used for any building type, starting from the rustic one to the contemporary one. They can also get colored as you like as plywood absorbs painting material quite easily.

  1. Thermal Insulation Advantage

Plywood does absorb a bit of heat, but not so much as metal roofing. It adds warmth to the room and halls under the roof. This is why plywood is such a good insulation agent for those who live in colder areas.

What Thickness Plywood is Used for Roofing?

Now, it is time to figure out the roof sheathing thickness for roofing. Basically, there is no setting stone for this. However, these thicknesses are just the most common ones. They do become the standard when people use plywood as the materials for their roofing selection.

What Thickness Plywood is used For Roofing
  1. The Minimum Thickness

The Minimum Thickness The minimum flat roof plywood thickness is around 3/8 inches. This is like the necessary thickness to have when you want the plywood to hold the structure of the roof sturdily.

  1. The Most Common Thickness

Most buildings, especially commercial ones, are using ¾ inch plywood roofing. Plywood of this thickness allows the roof to contain debris, snow, and dirt quite strongly, and they won’t affect the roof or make the roof fall that easily. For types of roofs that require more support, such as those with heavy snow loads, the thickness of roof plywood may need to be increased.

It all starts by choosing the right plywood thickness for roofing.

In addition to plywood, oriented strand board (OSB) is another popular material used for roof decking. It consists of layers of wood strands bonded together with adhesives. The choice between plywood and OSB often depends on factors like cost, durability, and local building codes.

Roof Support and Spacing

When installing plywood for roofing, it’s important to consider the spacing of the roof supports. Typically, roof supports are spaced 16 inches apart, but this can vary depending on the types of roofs and the specific requirements of the building structure.

Now, you have read almost everything related to the thickness. When you have decided to go with plywood for the roof, you can consider choosing the best material and the standard thickness so that the roof will be installed on the top of the house for decades without having to be replaced too often.

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RoofLast is an experienced author and roofing expert. With years of practical experience in the field authored several informative articles on various aspects of roofing, including installation, maintenance, and repair