Cement Board Siding Joints

The joint covers protect the butt joint where two siding planks meet and provide an expansion joint to help prevent siding buckling.

Cement board siding joints.

How to flash siding butt joints after the siding is installed. Once painted it looks almost identical to wood. A wraparound lower lip hooks the siding and requires one nail to hold it in place. Fiber cement siding accessories.

Joint covers are intended for use with hardboard and cement siding. James hardie is the world leader in fiber cement siding and backerboard. It is available in a variety of sizes and shapes to match many of the old siding shingles installed over the last 60 years. Caulk is usually used with fiber cement siding to prevent water intrusion at the butt joints.

Do not caulk fiber cement siding butt joints edges. Butt end joints should be installed with factory sealed or factory prefinished ends butted together in moderate contact. Weatherside fiber cement siding is the one and weatherside fiber cement siding is the one and only solution for replacing or repairing old asbestos siding shingles. James hardie 8 25 in x 144 in hz10 hardieplank cedarmill fiber cement lap siding.

It s available in many styles and widths both smooth and wood textured and you still get the crisp joints and details that ll make your home s exterior stand out. Fiberglass cement siding is a composite made of portland cement silica and wood fiber. A mark parlee a general contractor in des moines iowa responds in my experience water that gets trapped against fiber cement sidingcan be absorbed by the material causing joints to swell and shrink during freeze thaw cycles. A common problem with cement board siding products and some other types of horizontal lap siding is that older installation guidelines called for caulking the joint instead of flashing the joint.

Founded in the mid 1950s this diversified japanese company has been quietly producing fiber cement siding products for years mainly for commercial properties. Your nearest restaurant bank theater or grocery store just might be sided with nichiha fiber cement board. This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted in failure of the caulk joint and associated ongoing maintenance. It is never acceptable to leave a gap of any size at a butt end joint.

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