Frotte frank rotte october 24 2014 4 31pm 2 sounds good to me.
Roofing over particle board.
After installing over 10 000 new roofs and specializing in re decks i would never again install standard 1 2 cdx plywood over standard 7 16 osb.
Plywood vs particle board.
Always begin working at the point with the longest peak to eave distance.
Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm.
A homeowner recently wrote and asked me the following regarding osb roof decking.
With wood roofs slats are a must to avoid rotting the wood shakes.
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Even small amounts of water can cause particle board to warp buckle and fall apart.
Take care the first piece is aligned precisely perpendicular square to the edge.
Particle board is an inexpensive smooth product that can be used for underlayment under carpeting and vinyl flooring.
However even in the best of circumstances particle board is very susceptible to moisture damage.
As far as price goes yes on a normal size home.
If you have chosen to use a rigid roofing metal wood shakes or shingles tile etc you can use 1 x 4 slats instead.
Osb is widely used as roof decking material.
The particle board was visibly marked as type 2 m w considered aceptabe as roof sheathing by generally acceptd modern standards.
Add the metal panels.
If you want to pay more plywood cost double or more than osb than go with 1 2in plywood.
It is assumed here that you will be applying plywood particle board or wafer board sheathing.
Use as underlayment for resilient flooring to provide a suitable and durable installation surface for finished flooring products.
If your going over the exsisting spaced deck boards than 7 16 or 1 2 osb is fine.