Roof Boards Vs Plywood 05b

Why re sheet over shiplap.

Roof boards vs plywood 05b.

Snowfall and ice accumulation can affect the load put on a roof. Is plywood or osb best. However 3 4 th inch plywood is also used for a roofing system that has a heavier load. Plywood has been a go to material because it generally works and the price is right.

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. Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component. Hey gang re doing the roof on my detached garage. The edges may also swell during this time creating small yet visible ridges on the roof where the boards meet.

I would like to keep the weight down as much as possible. 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. My soffits and fascia board need to be replaced what do you recommend wood or hardie plank. Both cdx plywood and osb have advantages and disadvantages when it comes to plywood for roofing.

In an ideal world you would schedule your roof construction during a dry period if possible. The keyword here is solid it used to be standard to use shiplap 1 boards tongue groove or other boards for the roof deck. These 8 to 12 inch wide boards were nailed together tight. As roofing contractors in seattle we are often asked why do we need plywood over our old solid sheathing.

It is made from thin sheets of veneer peeled from debarked wood. Rafters run from the peak of the roof. Since the boards used for shiplap were manufactured here in the pacific northwest it was still cheaper than plywood up through the 1960s. There are always comparisons of plywood to particle board but at the end of the day both are susceptible to.

The minimum plywood for roofing. For the less standard 20 inch apart rafters plywood with inch or 5 8 th inch thickness can be used. Plywood is an engineered wood from the manufactured boards family which also includes particle board and oriented strand board osb. Most western washington residential homes during this time were built with shiplap roof decks rather than plywood.

When sheathing a roof. This carries enough structural integrity for most roof loads. 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.