Roof Sheathing Thickness For 24 Oc
For subfloors zip s 1 2 in.
Roof sheathing thickness for 24 oc. For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively. Oc rafters i have worked with cdx generic osb and advantech. Huber s zip system sheathing which we are using on the fhb house has a span rating of 24 16 for 7 16 in.
Two numbers separated by a slash e g 32 16 or 48 24. 2 thoughts on what thickness osb to use under shingles. Support spacing when the panel is used for subflooring. Never attach roof sheathing with staples.
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. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Sheathing should be a minimum of 19 32 inch thick. However if there is ever a roof leak i think the cdx holds up better.
Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Panels are rated 32 16. The typical thickness range for sheathing is 3 8 to 3 4 inch. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.
1 inch 25 4 mm. It can be used for rafters up to 40 in. It will support roof. A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c.
8d ring shank nails should be used instead. Plywood thickness for 24 quot. 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. The first number is the maximum on center o c support spacing in inches for roof sheathing.
What about the roof sheathing at 24 in. For rafters or 16 in.