Replies

1. 
   andy_s | Jul 11, 2019 12:40am | #1

   Maybe? I haven't seen that before but can't say it's necessarily wrong. We typically put a tab of tar paper behind the but joint and caulk the seam. It looks like this is a filler to make the butt joints flush once painted. Curious as to why that's needed. Wavy wall behind it?

2. 
   Mgonzales52 | Jul 15, 2019 12:46pm | #2

   I am going to be starting a project soon where I am using JH siding to replace some dilapidated vinyl siding. I have attached the "2018 recomended install procedure". Take a look at pg 88 and 89 where it talks about buttjoints.

3. 
   Mgonzales52 | Jul 15, 2019 12:54pm | #3

   Sorry, not sure why I can't attach. here is the recommendation-

   Caulking at HardiePlank lap siding buttjoints is not recommended for ColorPlus
   for aesthetic reasons as the caulking and ColorPlus will weather differently. For the
   same reason, do not caulk exposed nail heads. Refer to the ColorPlus touch-up
   section for details

   Butt joints in HardiePlank lap siding should always land on a stud. Butt joints between studs are not recommended and should be avoided. Whenever possible, factoryfinished
   ends should be used at butt joints.Place cut ends where the siding meets a corner, door,
   window trim, or other break in the wall where the joint is to be caulked. If cut ends are used in a butt joint between planks, James Hardie requires sealing cut ends for all
   products. For ColorPlus products, use the color-matched edge coater to seal the cut end.

4. 
   makita888 | Aug 03, 2019 10:15am | #4

   I use .024 aluminum flashing , spray with paint to match siding and cut in 3" wide x 5" tall strips and place behind seams overlapping lower course. DO NOT CAULK it will look terrible when siding expands

5. 
   florida | Aug 03, 2019 12:16pm | #5

   Probably nothing you can do about it at this point but it does void the warranty. Only the corners should be caulked.