Caulking Hardieplank Siding

This from installation instructions.

Caulking hardieplank siding. Typically made of a high density combination of cellulose fiber cement and sand fiber cement siding is tough termite resistant water resistant and non combustible. The nails holding up the siding should not be caulked. For regular hardiplank lap siding the kind you paint after installation caulking at butt joints is optional. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.

Also avoid caulking tongue and groove siding boards together. 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. 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. Joe i think your image is specifically for colorplus where they don t recommend caulking.

Hardiplank and other brands of cement siding are among the most durable of all siding materials. Osi quad product brochure. 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. Siding nails should not be caulked another item that needs room to play is siding boards themselves.

You have to consider the amount of siding you ll need how long it will take and any additional fees for equipment and materials. Metal flashing or any metal to wood joint should not be caulked another water exit pathway that should never be sealed. Because almost all of the james hardie product installed in edmonton is prefinished colorplus siding the caulking will.