Roof Boards Vs Plywood 05b

As roofing contractors in seattle we are often asked why do we need plywood over our old solid sheathing.

Roof boards vs plywood 05b. Snowfall and ice accumulation can affect the load put on a roof. When sheathing a roof. These 8 to 12 inch wide boards were nailed together tight. Is plywood or osb best.

There are always comparisons of plywood to particle board but at the end of the day both are susceptible to. However 3 4 th inch plywood is also used for a roofing system that has a heavier load. Until the 1940s exterior grade plywood was not available. At the end of the day what kind of plywood should you use for your roof.

Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. Contractors often prefer to use osb because of the significant. The keyword here is solid it used to be standard to use shiplap 1 boards tongue groove or other boards for the roof deck. Plywood has been a go to material because it generally works and the price is right.

The minimum plywood for roofing. Both cdx plywood and osb have advantages and disadvantages when it comes to plywood for roofing. Most western washington residential homes during this time were built with shiplap roof decks rather than plywood. 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.

In an ideal world you would schedule your roof construction during a dry period if possible. These thin layers also called plies are glued together in alternating right angles to create a cross grain pattern. 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. Rafters run from the peak of the roof.

Plywood is an engineered wood from the manufactured boards family which also includes particle board and oriented strand board osb. The edges may also swell during this time creating small yet visible ridges on the roof where the boards meet. 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. Hey gang re doing the roof on my detached garage.

For the less standard 20 inch apart rafters plywood with inch or 5 8 th inch thickness can be used. My soffits and fascia board need to be replaced what do you recommend wood or hardie plank. This carries enough structural integrity for most roof loads. I would like to keep the weight down as much as possible.