Roof Sheathing 1 8 Expansion

That can mean costly time consuming callbacks.

Roof sheathing 1 8 expansion.

No need to cut. The standard gap is 1 8. Use a spacer tool i e. Not always required but a good idea.

Plywood and oriented strand board osb like all wood products will expand or shrink slightly with changes in moisture content. Apa recommends a 1 8 inch space between panel edge and end joints. Install with the long dimension or strength axis of the panel across supports and with the panel continuous over two or more spans. Help prevent sheathing warping our clips leave a precise 1 8 gap created from a full width spacer bar.

The inspector told the guy that it could pass if he blocked the gaps on the entire roof deck. The osb sheathing we get locally has an installation stamp on its down side that states 1 8 minimum gap at ends and sides. Provide 1 8 minimum space at panel ends and edges. A 1 8 inch space between adjacent panel end and edge joints is recommended unless panel manufacturer indicates otherwise.

For improved performance consider thicker roof sheathing panels panel edge clips or panels with tongue and groove edges. Without this full gap sheathing can expand under moist conditions and you can end up with the sheathing warping. Plywood sheathing delivers outstanding rigidity strength and versatility and is an excellent choice for. If the wood structural panels are tightly butted there is no room for expansion and buckling can occur.

An easy way to keep it consistent is to space the sheets with a common framing nail. Probably the best way to explain it to your contractor is to tell him it s the recommendation of the apa and most building codes. It adds proven performance and durability to new homes room additions and renovations. Some older h clips do not provide a built in gap.

1 8 gap is 1 16 per sheet side. Check building code requirements for installation of panel edge clips. Complete the second row offset one rafter width from the first then move onto the third row and so on until the last. Panel end joints shall occur over framing.

H clips provide additional stiffness between bearing points for the unsupported edges of wood panel plywood or osb roof sheathing along with the necessary 1 8 gap for expansion as shown below illustrated on a bag of simpson h clips. Unless it s t g ply getting the sheets to 0 gap is almost impossible. Plywood sheathing is ideal for residential and light plywood sheathing is ideal for residential and light construction and every piece meets the highest grading standards for strength and appearance.