Provide a 1 8 inch gap.
Osb roof decking which side up.
Osb sheathing 15 32 cat ps2 10 osb sheathing application as 4 x 8.
Suitable applications include sheathing in walls flooring and roof decking.
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Sheets must have a 1 8 inch expansion gap between them and should be secured to the rafters.
I m halfway though sheeting the roof of my shipping container shop and already need to redo some of it.
Half inch osb is suitable for rafter spacings up to 24 inches whether or not the edges are supported.
Curved or uneven roof trusses will cause osb roof sheathing to warp or buckle under roof coverings.
When the grade stamp is covered by roofing the building inspector will not be able to confirm that the correct osb roofing panel was used.
Answer osb roof panels should always be installed with the grade stamp facing into the attic and the screened surface with the nail guide lines facing up.
However structurally there is no difference in how the panel will perform whether the side with the grade stamps is installed up or down.
Reduces up to 97 of radiant heat.
It reduces attic temperatures by up to 30 degrees fahrenheit and it blocks up to 97 of radiant heat.
Osb sheathing which side out.
Lay sheets in rows with the long edge horizontal to the roof bottom.
Install osb textured side up avoid installing osb with the textured side down.
The textured surface helps flashing and waterproof underlay stay in place effectively.
The minimum osb panel size is 24 inches in any direction and each sheet end must rest on a rafter.
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