Best Caulk For Hardie Board Siding

152 4 mm wide 1 in.

Best caulk for hardie board siding.

Some manufacturers do not require the metal flashing therefore we caulk the butt joint to keep the pieces together and also prevent moisture. You can use this sealant anywhere and on any kind of surface from cement to wood metal to plywood. Once all caulk is dry and your siding is clean you ll paint hardie plank with a high quality exterior grade acrylic latex. That is why we are showing you some other products for various surfaces along with our top pick.

In this article i ll talk about the caulk sealants i personally used. 25 4 mm on overlap no caulk figure 1. James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. But most importantly i ll share my experience about what you should and shouldn t do.

So here i am telling you about the best caulk for hardie siding. We only caulk butt joints on cedar siding if previously caulked. Then make sure the coating is completely dry before applying the 2 nd coat. But you are correct that it is very difficult to paint.

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. Pros and cons of painting hardie plank. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Big stretch acrylic latex caulking sealant by sashco.

So what i would tell you to do is to use a colored caulk to choose the caulk in the color of the siding. Without further ado let s get on with it comparison of our best caulk for hardie string. 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. Trim boards wood windows.

Fiber cement boards are caulked only when there is no metal flashing behind them. The dap 18110 acrylic latex caulk takes only half an hour to harden after which you can add any kind of paint or polish over it. It s got good adhesion and expands and contracts. What you want to use is a silicone caulk because it s the most permanent one.