Nailing of siding. It is usually good practice to avoid butt joints whenever possible. Use the longer sections of siding under windows and other long stretches and use the shorter lengths for areas between windows and doors. If unavoidable, butt joints should be made over a stud and staggered between courses as much as practical. Siding should be square-cut to provide a good joint at window and door casings and at butt joints.
Open joints permit moisture to enter, often leading to paint deterioration.
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