Roof Underlayment Nailing Pattern

Align shingles properly to avoid nail exposure.

Roof underlayment nailing pattern.

The nailing schedule will vary with the thickness of the underlayment so refer to an underlayment nailing schedule chart to get the right schedule for your job. For the lower portion of the roof especially the part that overhangs the eaves and is susceptible to ice dams it is a good idea to apply self stick waterproof shingle underlayment wsu also called ice guard. Install shingles according to manufacturer recommendations step 1. If you often experience winds of 50 mph or more you should seriously consider the high wind method of nailing.

One layer of felt underlayment all other regions. Shingles six roofing nails or staples per shingle. Position the nails appropriately according to the shingle installation instructions. Roofhelp has two ways of nailing the felt one for high wind regions and one for all other regions.

Put each nail about 4 inches apart along the edges and 6 inches apart across the remainder of the plywood. Wear safety glasses when nailing the plywood to protect your eyes from any debris. Pick up packs of 3d ring shank nails. Cover sheathing with shingle underlayment felt.

In most cases 4 nails are adequate. If you so happen to have thicker underlayment 3 4 inch or more then use 4d ring shank nails. Some roofers prefer to attach felt underlayment with 1 inch roofing nails or special nails with plastic washers but most codes allow staples which are easier to drive. These are 1 25 inches long and can be used for underlayment that ranges up to 1 2 thick.

For example inch underlayment. Nail metal drip edge flashing which bends over the roof and down the edge of the facing board on all roof edges. Ventilate the roof according to current building codes. Two layers of felt underlayment.

Each row of nails that are 24 on center should be approximately 12 from the outside edge of the roll. Check the nailing surface is level. These are 1 5 inches long plenty long to drive through that over sized over thick underlayment. One layer of felt underlayment high wind regions.

Drywall ceiling boards require 1 drywall screws every 6 8 while wall boards require drywall screws every 6 8 on the seams and 10 12 in the field. Always check for a level nailing surface. For duration series shingles owens corning recommends using either a 4 or 6 nail fastening pattern depending on the roof s slope and building code requirements. Tab shingles need two nails on each side of the tab.

Try to create a random pattern with the nails so they will not appear in a regular pattern through the flooring.