Osb Vs Plywood Roof

When it gets wet the sheathing could swell and thicken up because of the moisture.

Osb vs plywood roof.

Osb panels can be manufactured in lengths up to 16 feet or sometimes even higher while plywood is generally limited to 8 to 10 feet. Plywood is better than osb for subfloors. New homes will usually see a few rainfalls before a roof is on and as noted above osb doesn t handle moisture well. Today osb has 70 75 market share and plywood has about 25 share.

However osb is a lot cheaper and more affordable to buy. However when it is penetrated by water it takes a very long time to finally dry out compared to cdx plywood. Despite also being susceptible to water damage lipinskiy says that. Because of this manufacturing process osb is at least half the cost of cdx plywood.

Osb these sheets of wood may look similar but they are not created the same. Water test the edges of the 1 2 in. Alternatively osb is created from wood chips resin and adhesive that is baked and formed into the shape of a sheet of plywood. Unfortunately an osb is less resistant to water compared to plywood.

While a sheet of plywood might be 5 to 7 plies thick a sheet of osb is made from as many as 50 strand layers packed and compressed into the same thickness. Both osb and plywood absolutely hate water lipinskiy mentions going on to say that the most important part regardless of which decking option you choose is that all penetration points on a roof are sealed. Osb is made by combining glue resin and wood chips and pressing them into the shape of a plywood sheet then baking everything together. Thankfully there are osb materials today that are designed to be moisture resistant.

Despite its common use as such we don t recommend using osb for subfloors but that s really just for aesthetic reasons. Both of them are great for roofing. This is one of the reasons why some people prefer using plywood for their roof or subfloor. A few other downsides to plywood.

At the end it will be your consideration to choose between performance and cost. As osb is cheaper than plywood and has the strength and durability of plywood it is becoming more widely used than plywood. It is extremely resistant to moisture. Osb was introduced in the 1970s and steadily gained market share from plywood surpassing plywood in production in 2000.

Osb boasts a more consistent density. It becomes soft and weak when it delaminates. Compared to cdx oriented strand board osb is made very differently. Oriented strand board osb board that soaked in my bathtub overnight swelled almost 1 4 in.

The thickness of the plywood can be controlled by the number of plies glued together. The curb appeal of your home is lost because soon your shingles will start to misalign creating an eyesore on the top of your home. Eventually you can decide which one to use between plywood vs osb for roofing. How it s made plywood vs.