Caulking Cemplank Siding

V caulk replacement when sealant is in need of replacing carefully remove existing caulk and replace with a high quality paintable latex caulk. In my experience water that gets trapped against fiber cement siding can be absorbed by the material causing joints to swell and shrink during freeze thaw cycles. A diyer or a novice painter might attempt to achieve a cleaner look by caulking the siding nails but the nail is guaranteed to push the caulking material out within a few months.

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A mark parlee a general contractor in des moines iowa responds.

Caulking cemplank siding.

Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement. Cemboard fiber cement siding products are an attractive and durable alternative to vinyl and wood based siding. For best results use a latex caulk that complies with astm c 834 astm c920 or better. Caulking sealant must be applied in accordance with the caulking sealant manufacturer s written instructions or astm c1193.

On our jobs we typically don t leave gaps for caulk at butt joints because this detail can contribute to the problem. Cemboard siding provides the look and texture of wood with proven fiber cement performance at an exceptional value. Always caulk between the siding and the trim. Dents chips cracks and other minor surface damage in james hardie siding and trim products can be filled with cementitious patching compound.

Similar to paint previous coats of. Cemplank lap siding and cempanel vertical siding can be installed and finished like wood. Always prime or paint any cut edges that are inserted into a window j channel. Vertical trim gap caulking.

Instead we snug the joints up tight and. The nails holding up the siding should not be caulked. Is the old caulking removed before new coats are applied. Do not caulk between siding and any built in receiving channels located at or around windows.

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