Caulking Hardie Board Siding

Osi quad product brochure.

Caulking hardie board siding.

Joint flashing butt joint horizontal lap treatment june 2014 james hardie does not recommend caulking butt joints or the horizontal overlaps joint flashing 6 in. 801 caulk 10 1 oz by dap best exterior caulk for hardiplank siding. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. James hardie color match caulk osi quad caulk for exterior door window and siding applications color matched to james hardie colors uv water resistant will not crack or yellow 1 tube covers 29 lineal feet at 1 4 bead width or 13 lineal feet at a 3 8 bead width paintable.

Apparently no one here read the technical bulletin 9 that james hardie released in 2008. James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. Bottom of siding boards should not be caulked water is meant to exit through the bottom of each board. This video is about how to like a pro.

Caulking them is a mistake and the caulking is likely to fail prematurely. 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. 25 4 mm on overlap no caulk figure 1. 152 4 mm wide 1 in.

Hardie no longer recommends the caulking of any joint in their lap siding colorplus or primed. Overview rubber adhesive sealant caulk by flex shot best caulk for hardie board and interior objects. Overview all weather window door max shield by ge sealants and adhesive best caulking for hardie board siding in budget. Because almost all of the james hardie product installed in edmonton is prefinished colorplus siding the caulking will be available in.

While paint does tend to somewhat glue these pieces together caulking them is never advised and can cause permanent damage. 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. Wherever hardie siding meets a trim board the company recommends you leave a 1 8 gap between the siding and the trim and apply a 3 8 bead of approved caulking to protect and seal the edge of the siding.