Roof Nail Size For Underlayment

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.

Roof nail size for underlayment.

Nail metal drip edge flashing which bends over the roof and down the edge of the facing board on all roof edges. Plastic round cap roofing nail 3 000 pack 21 97 grip rite grip rite 1 1 4 in. Nail down squarely 90 degrees into the deck to secure caps flush to the underlayment. Only use 1 diameter plastic cap roofing nails.

Wood shakes minimum 3 4 sheathing wood shakes nail type minimum length 18 straight split 5d box 1 3 4 18 and 24 handsplit and resawn 6d box 2. When nailing shingles proper penetration into the roof deck is essential to ensure the nail and shingle remain secure. On center on both head and end laps. Slats of wood used for roof sheathing are lumber boards with face widths ranging from 4 to 12 inches.

These are 1 25 inches long and can be used for underlayment that ranges up to 1 2 thick. Generally you ll need to place two nails at each location where it makes contact with a roof truss. If you so happen to have thicker underlayment 3 4 inch or more then use 4d ring shank nails. The more common roof thickness is 3 4 inch decking.

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. For slats featuring face widths of 12 inches you will space three nails evenly apart about every 3 inches. Fasten drip edge on eaves with galvanized nails and a hammer about 12 inches. In normal wind zones the nails should be driven at 6 0 o c.

Fasten the field area in the middle of the roll a minimum of 24 o c. These are 1 5 inches long plenty long to drive through that over sized over thick underlayment. 12 x 1 in. In normal wind zones.

Whether you screw nail or staple your 3 8ths underlayment depends completely upon what flooring product you are planning to put over it. More than 1 layer of roofing not recommended over 3 8 sheathing. The international building code requires that roofing nails have a minimum 12 gauge shank and a 3 8 inch diameter head. Smooth galvanized coil roofing nails 7200 pack 26 98 gaf feltbuster 1000 sq.