Learn about sheathing 💪 #build #carpentry #build #sheathing

Sheathing explained. Three standard types of sheathing. You have plywood, OSB, and slats. After your foundation is poured and your pressure treated sill plate is installed, we have rim joists on the outside, standard joists on the inside. Then you install your sheathing. In older homes, they use slats and it was installed on a 45° angle, similar to this. More common now is OSB and plywood. Three things we need to pay attention to with sheathing, strength axis. That's the direction where it has the most strength. It'll say this side down. If you install OSB the wrong way, one side is smooth, so if you use it on your roof, you'll definitely be slipping. The side also has to do with the strength. You want to pay attention to your thickness. Depending on its application, you want to be sure that you're using the right thickness material. OSB is typically a cheaper option, but has a lot of swelling issues. Plywood also does swell, but stays more rigid. Some newer OSBs are made to handle the water, so do your research. Three things when you're installing your sheathing. First thing is using the biggest material you can. Second thing is you want to be sure that you have 23/32 thickness or bigger. Most people call it 3/4. Lastly, you want to be sure that you're staggering your joints. You want to stagger at least one joist bay, but two joist bay is even better. You do not want to be installing your sheathing like this. The point of the sheathing is to lock your floor together and help with shear forces. Same thing with your walls and your roof. After your subfloor's installed, you can start installing your walls. Walls are typically installed with 7/16 or bigger and most commonly installed horizontally. You are allowed to install vertical with proper blocking, but always check your plans. This is more common for shear walls and other situations. When you install your roof, always installing your plywood horizontally. This plywood in some cases can be 7/16, but it's always better to go with 1/2 inch or bigger. These two numbers show how far you can span. When you're horizontal like this, you can do 48 on center. When people say 3/4, it's often that they mean 23/32. When you install your sheathing on your roof, you need to make sure that you're using H clips. These H clips go in the rafter bay. This helps hold the other sheet for spacing and helps with deflection. Keep in mind in between your seams that you need to space your sheathing. They should not be touching each other. Thanks for watching.