Should Roofing Nails Go Through The Sheathing

Roof truss spacing will vary on the structure s construction.

Should roofing nails go through the sheathing.

To determine the nail length you should consider the number of layers of shingles shingle thicknesses underlayment and flashings installed on eaves sidewalls and valleys etc. 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. You say the nails are sticking through the plywood if this is the case you are supposed to have a soffit installed that covers the underside of the roof deck. Yes it is important that roofing nails are long enough to penetrate the sheathing.

Using a 1 inch nail is best. The sharp tip of the roofing nail should completely pass through and extend approximately 3 8 inch past the underside of the roof sheathing. It is vitally important that roofing nails of the correct length were used to secure the shingles. There are typically 12 16 or 24 inch spans between each roof truss.

With the shingles and inch sheathing the nails should protrude about inch through. In fact in most states the minimum length of the nail for roofing is 1 inches. Roofing contractors have told me electro galvanized nails that stick out past the sheathing edge can attract water which can prevent the wood deck from absorbing the moisture and rotting. It makes sense to use nails to attach the decking or sheathing into place.

The number of nails you ll need depends on the face width of the sheathing you re using. This nail probably was driven very close to the horizontal seam of the sheets of plywood under the shingles. Ask contractors how building codes may affect the appearance of your exterior projects and discuss cosmetic options before the job begins. A home with exposed eaves normally has a beadboard or similar type of wood on the exposed portion if this is the case and nails are poking through your roofer needs to fix this for you.

You ll need to use nails wherever the roof sheathing makes direct contact with each truss.