Caulk Shiplap Siding

Smooth out the caulk with your finger or putty knife.

Caulk shiplap siding.

Make the seams as smooth as possible. The siding expands and contracts with temperature and humidity. Use this product for exterior siding outdoor living areas bathrooms exposed to high levels of steam and moisture or any other area where weather or moisture may play a role. Also avoid caulking tongue and groove siding boards together.

Cut a tiny opening with a utility knife not the cutter on the caulk gun. Step 7 sand the edges. Smooth and evenly distribute the caulk into the gaps by dragging your finger along the bead of caulk. Step 6 seal with caulk.

While paint does tend to somewhat glue these pieces together caulking them is never advised and can cause permanent damage. Be sure to paint the caulk even if it s the same color as your shiplap. Run a bead of caulk along the edge of the newly installed shiplap siding. Caulk makes the entire project come together and look seamless.

After the caulk is dry use the sandpaper to sand away the rough edges and built up caulk. Water is meant to exit through the bottom of each board. It is specifically designed for exterior siding and is manufactured using recycled materials that are extremely dimensionally stable and resistant to rot and decay. Unpainted caulk is impossible to clean and attracts dust.

The process of filling them all is tedious and slow but in my opinion very necessary. Press any excess caulk on your finger into each gap created by the lap siding and then smooth. For best results use paintable caulk. Some of the most commonly caulked areas of siding include both corners and crevices as well as some butt joints and window and door trim boards.

Don t apply too much caulk. In my opinion caulking between the seams in any lapped siding either horizontal or vertical is not good practice but not just because of any potential vapor barrier effect. 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.