Roof Boards Spacing

So the space between rafters can be greater without reducing the maximum span.

Roof boards spacing.

Adjust spacing between deck boards measure to the house at both ends and in the center when you get within about 5 ft. To stabilize the rafters support the roofing material and hold the entire roof together roof sheathing is installed. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet.

Julia i don t know if code applies but in my opinion your deck problems are the result of an inexperienced carpenter. There are typically 12 16 or. Apa recommends a 1 8 inch space between panel edge and end joints. The type of nails you ll need to use during the sheathing process depends on the roof material thickness.

The last board won t look good if it s skinny or cut at an angle. Roof truss spacing will vary on the structure s construction. Roof sheathing basics the skeleton of a roof is formed with rafters or trusses generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next. Deck boards should be spaced well apart 1 8 is the minimum and i would go wider usually 3 8.

The same concept holds true for roof trusses. Plywood and oriented strand board osb like all wood products will expand or shrink slightly with changes in moisture content. When to use 12 inch spacing. If the wood structural panels are tightly butted there is no room for expansion and buckling can occur.

How many nails per board in roof sheathing. That can mean costly time consuming callbacks. You want to use 12 inch spacing on smaller pergolas where the weight of many rafters close together won t cause the beam to sag or on pergolas 14 feet in width and under. Without that gap you get stuff accumulating between the boards that you can t easily clean out.