Field Joint On Cement Siding

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Field joint on cement siding. 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. Fiber cement siding accessories. Quick and easy. Butt end joints should be installed with factory sealed or factory prefinished ends butted together in moderate contact.

Measure and cut to length the first piece of siding and nail it in place photo 7. Hardiplank lap siding is a fiber cement siding product that looks like wood clapboards but outperforms it when it comes to weather resistance and finish performance. James hardie 8 25 in x 144 in hz10 hardieplank cedarmill fiber cement lap siding. Do not caulk fiber cement siding butt joints edges.

It is never acceptable to leave a gap of any size at a butt end joint. Caulk is usually used with fiber cement siding to prevent water intrusion at the butt joints. Bearskin joint flashing is a plastic sheet for use as a joint flashing behind every butt joint in the siding. The product is a proprietary plastic 20 year uv rated sheet 4 ml thick that is basically a six by twelve post it note.

Some instructions permit caulking at primed and smooth siding presumably because the caulk cosmetic defect will be hidden by the finish paint job. Install the next piece so its end butts lightly against the first photo 7 inset. Gap where the end meets the corner board photo 7 inset and make sure the other end lands on a stud line. In the last few years all manufacturers all that i know of at least have moved to strongly prefer or specifically demand that the field butt joints be flashed not.

Each sheet is pre cut with a stick it adhesive for the fastest application available. Generally the manufacturers do not recommend caulking at factory painted fiber cement siding butt joints presumably because it creates a cosmetic defect. Hardiplank lap siding is a fantastic siding material that we ve been using for years on both residential and light commercial building projects. However this detail may not be effective at sealing the ends allowing water to be absorbed and swell the board ends.

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. For pricing and availability.