Caulking Hardie Lap Siding

Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.

Caulking hardie lap siding.

In the old days the builder would install the trim bring the siding up to it and caulk the corner. Hardie no longer recommends the caulking of any joint in their lap siding colorplus or primed. 152 4 mm wide 1 in. James hardie hardiplank lap siding installation instructions pdf 2001 jameshardie corp 26300 la alameda suite 250 mission viejo ca 92691.

Butyl rubber is sometimes recommended for exterior siding since it s a specialty outdoor caulk that can withstand changes in temperature and repeated exposure to the elements but you can choose any exterior caulk that will bond to your siding just make sure to read the labels and spot check on an unseen portion of your siding to make sure. James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. 25 4 mm on overlap no caulk figure 1. 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.

Lasalle st suite 2000. 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. On most new homes the trim goes up after the siding is installed which creates a large gap that should not be caulked. We need air circulation behind these boards and the opening acts as a water exit should water ever go behind the boards.

Because almost all of the james hardie product installed in edmonton is prefinished colorplus siding the caulking will. 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. Joint flashing is recommended for all hardie lap siding now. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.