Roof Sheathing Thickness For 24 Oc

It can be used for rafters up to 40 in.

Roof sheathing thickness for 24 oc.

Panels are rated 32 16. Around here southern mn the cities you can drive through the neighborhoods with cheaper houses the ones with trusses on 24 centers and 1 2 or 7 16 sheeting and most many will have sagged roofs. A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c. Two numbers separated by a slash e g 32 16 or 48 24.

1 inch 25 4 mm. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. 2 thoughts on what thickness osb to use under shingles. The first number is the maximum on center o c support spacing in inches for roof sheathing.

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. What about the roof sheathing at 24 in. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7. For rafters or 16 in.

Never attach roof sheathing with staples. Plywood thickness for 24 quot. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Tongue and groove sheathing rated 40 20.

That means it can be used at 24 in. Sheathing should be a minimum of 19 32 inch thick. Oc rafters i have worked with cdx generic osb and advantech. The second number is the maximum o c.

The typical thickness range for sheathing is 3 8 to 3 4 inch. As far as installation goes i much prefer using osb or advantech over ply simply because it lays flat and doesn t warp curl like cdx. For subfloors zip s 1 2 in. However if there is ever a roof leak i think the cdx holds up better.

Huber s zip system sheathing which we are using on the fhb house has a span rating of 24 16 for 7 16 in. 8d ring shank nails should be used instead.