Caulking Cedar Siding Seams

If i install a non finished product i usually go with a 3m paintable caulk.

Caulking cedar siding seams.

James hardie recommends the use of caulks and sealants that remain permanently flexible. When james hardie siding products butt into wood based materials a 1 8 gap will allow for expansion and contraction of the wood based product. Out from the fascia. It needs to move and breathe.

In my opinion caulking between the seams in any lapped siding either horizontal or vertical is not good practice but not just because of any potential vapor barrier effect. The siding expands and contracts with temperature and humidity. Nichiha panels bring the look of wood stone brick metal more to your commercial or residential projects with high performance fiber cement. Natural siding boards are designed to expand and contract with the elements and we do not want any adhesive to prevent their natural movement.

If i am installing a prefinished product which i do mostly i use a color osi match caulk. Z flashing z flashing z flashing min. Do not caulk extend shingles at least 1 in. I m not a painter but i do install cedar siding and i always caulk all the joints.

Siding caulk can be used on several different areas of your exterior siding to help prevent water damage and moisture buildup. Think of a wood home as a living thing. Because the staing will tint the caulk slightly. Grumpy chicago gutters.

Generally we do not recommend caulking butt joints on cedar siding. Slabs path steps to siding figure 7 deck to wall figure 8 ground to siding figure 9 gutter to siding figure 12 drip edge figure 13 block penetration figure 14 valley shingle extension min.