Choosing What Plywood is Best For Roofing
When choosing plywood for roofing, there are several factors to consider. The quality of wood used will greatly influence the lifespan of the roofing material. Wood that is constantly exposed to moisture will have a shorter lifespan. Also, roofs made of plywood that has been properly installed will last longer than those that are haphazardly put up. The thickness of plywood also plays a role in the stability of the entire structure, so you should use the construction grade. residential roofing
A standard sheet of plywood is 4×8 inches. The thickness of this material will vary slightly from one company to the next, but it will never be too thin for roofing. If you mix different types of plywood for roofing, it is crucial to purchase enough plywood to cover the entire surface of the roof. The same applies if you mix different thicknesses. The thickness of the plywood should be equal to the final sheathing thickness.
When comparing plywood types, look for the grade. Construction-grade plywood is rated CDX, and that grade is for exterior use. It is suitable for exposed roofing and can handle moisture, but only for a short period of time. Once exposed to moisture, CDX plywood can warp or delaminate. This type of plywood has multiple layers of wood stacked on top of each other, with alternating grain patterns in each layer.
When choosing a type of plywood for your project, make sure to consider what functions it will have. For roofing, FRT plywood is the best choice, as it is fire-retardant and will resist fire, so it will not escalate disaster. If you don’t have a specific need for FRT, you can also look for a different kind of plywood. Just remember that the roof of a building is one of the most important parts, so you should choose wisely!
When selecting the right plywood for roofing, the thickness is important as it will determine how much weight will be placed on it. A thickness of 3/4 inch is generally appropriate for flat roofs, but it is necessary to understand how the plywood will be used on steep roofs. For example, a roof that is less steep is likely to bear heavier weights, so it is necessary to choose a plywood that is half inch thick or higher.
OSB is a cheaper alternative to plywood. The only significant downside of OSB is that it does not respond well to moisture. It takes a long time to dry, and the edges of the plywood sheet will be visible when water reaches them. Also, a plywood roof will be easier to maintain, as it will last longer than an OSB roof. In addition to being cheaper, OSB is also a superior insulator.
Among the many benefits of plywood, the most notable is its durability. Its consistent thickness prevents cracks from forming. It is also more resistant to warping and shrinking. Although OSB is more durable than plywood, it has a long history of durability. While it does cost more, it is worth it for the peace of mind and long-term performance of your roof. This material is a great choice for many applications.