Roof Sheathing 1 8 Expansion

The standard gap is 1 8.

Roof sheathing 1 8 expansion.

That can mean costly time consuming callbacks. Install with the long dimension or strength axis of the panel across supports and with the panel continuous over two or more spans. 1 8 gap is 1 16 per sheet side. The osb sheathing we get locally has an installation stamp on its down side that states 1 8 minimum gap at ends and sides.

Apa recommends a 1 8 inch space between panel edge and end joints. For improved performance consider thicker roof sheathing panels panel edge clips or panels with tongue and groove edges. Panel end joints shall occur over framing. An easy way to keep it consistent is to space the sheets with a common framing nail.

Raise the sheathing 1 8 inch above the previous row and nail it into place. Provide 1 8 minimum space at panel ends and edges. Use a spacer tool i e. No need to cut.

Not always required but a good idea. 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. Unless it s t g ply getting the sheets to 0 gap is almost impossible.

It adds proven performance and durability to new homes room additions and renovations. 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. We had an inspector turn down a house framed by another framer for too much gap. Help prevent sheathing warping our clips leave a precise 1 8 gap created from a full width spacer bar.

A 1 8 inch space between adjacent panel end and edge joints is recommended unless panel manufacturer indicates otherwise. Plywood and oriented strand board osb like all wood products will expand or shrink slightly with changes in moisture content. Some older h clips do not provide a built in gap. The inspector told the guy that it could pass if he blocked the gaps on the entire roof deck.

If the wood structural panels are tightly butted there is no room for expansion and buckling can occur. 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.