The nails holding up the siding should not be caulked.
Caulking between hardiplank siding.
This video is about how to like a pro.
James hardie does not recommend using caulk or h jointers for the butt joints of hardieplank siding with colorplus technology.
If you use sashco s acrylic latex caulking sealant you can have any interior or exterior as good as new.
Leave a 1 8 gap between the siding and the trim or other materials to allow for structural movement.
A diyer or a novice painter might attempt to achieve a cleaner look by caulking the siding nails but the nail is guaranteed to push the caulking material out within a few months.
Always prime or paint any cut edges that are inserted into a window j channel.
Although it is convenient hardiplank siding is still susceptible to cracks which requires a caulking treatment to repair.
Step 1 dampen a dry rag with denatured alcohol and wipe the area surrounding the crack.
You need to have the best caulk for hardie siding to help your walls and wooden surfaces to get rid of open cracks and thin spaces between joints.
This cleans all visible dirt and residue from the surface and prepares a clear foundation for caulking.
James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2.
Vertical trim gap caulking.
Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.
When to use caulk on exterior siding siding caulk can be used on several different areas of your exterior siding to help prevent water damage and moisture buildup.
Always caulk between the siding and the trim.
Siding nails should not be caulked another item that needs room to play is siding boards themselves.
But here the main problem is people usually don t find the right type of caulk for their works.
Do not caulk between siding and any built in receiving channels located at or around windows.
Joint flashing butt joint horizontal lap treatment june 2014 james hardie does not recommend caulking.