Roof Sheathing 1 8 Expansion

We had an inspector turn down a house framed by another framer for too much gap.

Roof sheathing 1 8 expansion.

Raise the sheathing 1 8 inch above the previous row and nail it into place. The standard gap is 1 8. Not always required but a good idea. 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. Apa recommends a 1 8 inch space between panel edge and end joints. Provide 1 8 minimum space at panel ends and edges. Help prevent sheathing warping our clips leave a precise 1 8 gap created from a full width spacer bar.

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. The inspector told the guy that it could pass if he blocked the gaps on the entire roof deck. Some older h clips do not provide a built in gap.

Complete the second row offset one rafter width from the first then move onto the third row and so on until the last. For improved performance consider thicker roof sheathing panels panel edge clips or panels with tongue and groove edges. Install with the long dimension or strength axis of the panel across supports and with the panel continuous over two or more spans. Check building code requirements for installation of panel edge clips.

If the wood structural panels are tightly butted there is no room for expansion and buckling can occur. 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. That can mean costly time consuming callbacks. 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.

Panel end joints shall occur over framing. An easy way to keep it consistent is to space the sheets with a common framing nail. No need to cut. The osb sheathing we get locally has an installation stamp on its down side that states 1 8 minimum gap at ends and sides.

Use a spacer tool i e. A 1 8 inch space between adjacent panel end and edge joints is recommended unless panel manufacturer indicates otherwise. It adds proven performance and durability to new homes room additions and renovations.