Roof Boards Vs Plywood 05b

My soffits and fascia board need to be replaced what do you recommend wood or hardie plank.

Roof boards vs plywood 05b.

Hey gang re doing the roof on my detached garage. Osb and plywood come in thicknesses ranging from 5 16 to 3 4 inch and the thickness needed for a particular roof depends on several factors including rafter spacing expected load and roof design. When sheathing a roof. The ability of plywood to return to shape after wetting makes it a lot less risky in this application and while a little more expensive that s still cheaper than having to replace a floor.

These thin layers also called plies are glued together in alternating right angles to create a cross grain pattern. Until the 1940s exterior grade plywood was not available. It is made from thin sheets of veneer peeled from debarked wood. Most western washington residential homes during this time were built with shiplap roof decks rather than plywood.

However 3 4 th inch plywood is also used for a roofing system that has a heavier load. Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. The minimum plywood for roofing. Is plywood or osb best.

These 8 to 12 inch wide boards were nailed together tight. In an ideal world you would schedule your roof construction during a dry period if possible. Plywood has been a go to material because it generally works and the price is right. Plywood is an engineered wood from the manufactured boards family which also includes particle board and oriented strand board osb.

This carries enough structural integrity for most roof loads. Contractors often prefer to use osb because of the significant. My existing fascia board is wood 2 x10 not sure why so large and heavy but that is what it is and the existing soffit is ply. As roofing contractors in seattle we are often asked why do we need plywood over our old solid sheathing.

Since the boards used for shiplap were manufactured here in the pacific northwest it was still cheaper than plywood up through the 1960s. At the end of the day what kind of plywood should you use for your roof. There are always comparisons of plywood to particle board but at the end of the day both are susceptible to. Why re sheet over shiplap.

For the less standard 20 inch apart rafters plywood with inch or 5 8 th inch thickness can be used. The keyword here is solid it used to be standard to use shiplap 1 boards tongue groove or other boards for the roof deck. Rafters run from the peak of the roof. Both cdx plywood and osb have advantages and disadvantages when it comes to plywood for roofing.