In an ideal world you would schedule your roof construction during a dry period if possible.
Roof boards vs plywood 05b.
Plywood has been a go to material because it generally works and the price is right.
Until the 1940s exterior grade plywood was not available.
Roofs are framed with rafters or trusses which are rafters joined by internal braces so they install as a single component.
It is made from thin sheets of veneer peeled from debarked wood.
The edges may also swell during this time creating small yet visible ridges on the roof where the boards meet.
Why re sheet over shiplap.
Plywood is an engineered wood from the manufactured boards family which also includes particle board and oriented strand board osb.
The keyword here is solid it used to be standard to use shiplap 1 boards tongue groove or other boards for the roof deck.
However 3 4 th inch plywood is also used for a roofing system that has a heavier load.
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.
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.
These thin layers also called plies are glued together in alternating right angles to create a cross grain pattern.
Both cdx plywood and osb have advantages and disadvantages when it comes to plywood for roofing.
Rafters run from the peak of the roof.
Hey gang re doing the roof on my detached garage.
Is plywood or osb best.
Most western washington residential homes during this time were built with shiplap roof decks rather than plywood.
Contractors often prefer to use osb because of the significant.
For the less standard 20 inch apart rafters plywood with inch or 5 8 th inch thickness can be used.
As roofing contractors in seattle we are often asked why do we need plywood over our old solid sheathing.
I would like to keep the weight down as much as possible.
These 8 to 12 inch wide boards were nailed together tight.
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.
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.
Snowfall and ice accumulation can affect the load put on a roof.
Since the boards used for shiplap were manufactured here in the pacific northwest it was still cheaper than plywood up through the 1960s.
When sheathing a roof.
