Roof Plywood Nailing Pattern

A structure s roof truss spacing can vary from every 12 to 24 inches.

Roof plywood nailing pattern.

Roofing nails should be long enough to penetrate the roofing material and go 19 mm into osb solid wood plywood or non veneer wood decking or through thickness of decking whichever is less. Metal roofing is also available in the form of shingles. Nailing schedules for wood structural panel roof sheathing plywood and oriented strand board osb. Check the nailing surface is level.

Ventilate the roof according to current building codes. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Wet and dry specimens of plywood and. Follow these 5 simple construction steps for roof sheathing and scroll down to see more details on each with installation hints and tips below step 1.

2 8d galvanized ring shanks with a nail gun. The roof ridge by nailing roof sheathing. During a hurricane the strength of the sheathing on the roof can greatly impact the homes ability to weather the storm. Boards used for sheathing range from those with a 4 inch face to 48 inch long plywood sheets.

Believe me you don t want to have to remove one of these sheets when fastened at the proper nail spacing. Never screwed the plywood roof decking on. Properly fasten panels including fastening and spacing hints. The number of nails needed for a roof varies on multiple factors such as board face width length and roof truss spacing.

The connection between the roof sheathing and the structure is a vulnerable point that is known to fail during a hurricane. And if you ve ever had to deal with a home inspector checking your nailing schedule then you probably know all about how big of a pain in the a it can be to make them happy. Recommendations were developed through engineering analysis and by full scale laboratory testing. This video shows how some roofs fail under heavy winds in uplift situations.

Installing a roof is much more than just nailing shingles onto some boards. I personally do not like staples because i don t have any confidence in the longevity of the wire gauge. If you ve ever installed shingles plywood headers or drywall you probably already know all about nailing patterns. It starts with installing solid decking usually plywood or oriented strand board but that is not waterproof.

For clarity sheathing nails are not shown ladder framing at gable ends. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Ladder framing at gable ends use extra care when attaching a ladder framed exten sion to a gable end. These schedules were calculated to provide resistance to wind uplift pressure as required by most codes.

To determine the nail length you should consider the number of layers of shingles shingle thicknesses underlayment and flashings installed on eaves.