Roof Sheathing Thickness For 24 Oc

Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of section 2304 7.

Roof sheathing thickness for 24 oc.

A panel marked 32 16 may be used for roof sheathing over supports spaced up to 32 inches o c. Oc rafters i have worked with cdx generic osb and advantech. The second number is the maximum o c. Installation details shall conform to sections 2304 7 1 and 2304 7 2 for floor and roof sheathing respectively.

Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Huber s zip system sheathing which we are using on the fhb house has a span rating of 24 16 for 7 16 in. 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. Tongue and groove sheathing rated 40 20.

That means it can be used at 24 in. 8d ring shank nails should be used instead. 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.

It can be used for rafters up to 40 in. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. For subfloors zip s 1 2 in. Support spacing when the panel is used for subflooring.

2 thoughts on what thickness osb to use under shingles. Never attach roof sheathing with staples. What about the roof sheathing at 24 in. It will support roof.

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. Sheathing should be a minimum of 19 32 inch thick. 1 inch 25 4 mm. Panels are rated 32 16.

However if there is ever a roof leak i think the cdx holds up better. For rafters or 16 in.