Line up the lower edge ? or butt edge ? of the first full-width clapboard so that it covers the starter strip and lies a hair above the water table. This is the starter course.
Apply sealant along the corner boards. Bed clapboard ends into it, leaving 1/16 inch space along the corner board.
An inch above the siding's butt edge, drive in one 7d nail into each stud.
If clapboard isn't long enough to span a wall, splice two together with a 45-degree scarf joint. Apply sealant to the ends, fit them together, and drive one nail through the overlapping board ½ inch to the side of the joint.
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for marking story pole and swing stick
for premarking courses and for finding and marking plumb lines at stud locations
for notching clapboard and cutting felt, flashing, and waterproofing membrane
Hammer tacker and staples,
for attaching builder's felt to sheathing alternative: staple gun
Caulk gun with paintable, synthetic-rubber sealant,
for sealing ends of clapboard at casings, frieze, and corner boards
Ladder or scaffolding,
for reaching high spots
for cutting clapboards to length
for ripping down the starter strip
2. BUILDER'S FELT: 15-POUND, 12-INCH-WIDE ROLL
for protecting sheathing at water table, corner boards, and around window and door casings
3. BUILDER'S FELT: 2-INCH-WIDE ROLL
for covering the wall at stud locations
4. METAL FLASHING
for covering the top edge of the water table and window casings
5. WATERPROOF MEMBRANE
for protecting the tops of windows and doors
6. 4D AND 7D STAINLESS STEEL RING-SHANK NAILS
for attaching clapboard and flashing