Joints In Courses Of Wood Siding Should Be

Butt joints but not all butt joints.

Joints in courses of wood siding should be.

As a rule of thumb there should be at least 1 of overlap from one board to the next so that a nail through the top clapboard also runs through the one below it and into the sheathing at least 1 deep. With plywood sidings use a z flashing at horizontal joints to shed water to the outside see figure 1 13 at above left. Ideally joints in courses of wood siding should be staggered. Ideally joints in courses of wood siding should be.

If exposed to the elements will absorb moisture quickly making it swell so it is particularly susceptible to moisture and physical damage. Generally we do not recommend caulking butt joints on cedar siding. Vertical and plywood siding butt joint details avoid horizontal butt joints in vertical siding. Natural siding boards are designed to expand and contract with the elements and we do not want any adhesive to prevent their natural movement.

The tops and bottoms also have locking tabs. Where a butt joint is necessary use a scarf joint sloped down toward the building s exterior. Siding shall be installed with top blind nailing with the nails placed 3 8 inch 10 mm from either end and a minimum of 3 4 inch 19 mm from the top edge of the board. While newer more modern materials have become very fashionable recently because of the benefits they provide in terms of weathering and damage resistance wood siding is still commonly found on homes all over the world.

The wood shingle panels range from one course panels 32 inches wide to three four and five course panels 2 feet wide by 8 feet long including panels with decorative patterns. Some wood siding shingle manufacturers also offer prefabricated inside and outside corners radiused panels for curved walls column wraps and other types of labor. In a perfect world the courses should break conveniently right at the tops and bottoms of window and door casings. Butt joints should be staggered over successive courses.

Should they always be caulked. Where two pieces of siding meet. Fasteners will be exposed on siding located immediately below window sills. The answer depends on the manufacturer and installation method used when the siding was first installed.

The top flange called a nail hem has holes for staples or roofing nails.