How to Shiplap Using Underlayment-The Easy Way

April 18, 2019

Hi! I'm Nicole

Fearless DIY. Sharing building project tutorials and interior design tips. Let’s build something beautiful together. For more projects, design tips and behind the scenes, follow me @designtobuild.nicole

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While writing last week’s post, I realized I don’t have a good tutorial on how to shiplap using underlayment. As I shared last week, this is my favorite go-to when adding shiplap to any of my walls. I have tried other techniques, but this one is by far the easiest and the least expensive….floating shelves styled with farmhouse decor on a wall of shiplap using underlayment

spring decor in foyer

mudroom decorated with shiplap using underlayment

How to Shiplap Using Underlayment

Materials Needed:

Underlayment (4’x8′ sheet) (Number needed is dependent upon project size)

Miter saw

Table saw (or circular saw)

Jig saw Affiliate Link

Nail gun

3/4″ nails

Tape measure

Nail filler Affiliate Link

220-grit sandpaper



Step One:

Paint walls the same color the shiplap walls will be.

Step Two:

Cut underlayment into strips. I like to cut mine 6″ wide…making the strips 4 feet long and 6 inches wide.

Step Three:

Starting from the top of the wall, measure length of board needed. I like to start with a 2 foot strip in the left corner. Working your way left to right, here’s the pattern: 2 foot strip, 4 foot strip, 2 foot strip, repeat all the way to bottom of wall. Using your nail gun attach each board to the wall.

Shiplap using underlayment

Step Four:

Fill in all of the nail holes using wood filler. Then sand those spots with 220-grit sandpaper.

Step Five:

Caulk: where the shiplap meets the corner of the wall; down along the baseboards; all along the ceiling.

Check out this post for tips on Caulking.

Step Six:

Ready for paint!!

Tip: If you are adding shiplap to walls that join together, it helps to add a 2×2 strip. It’s very unlikely that all of your boards will line up perfectly. This strip tricks the eye into not noticing this imperfection. It works like a charm….

modern farmhouse style guest bathroom with shiplap walls, 3 baskets on the wall with white towels, and tissue dispenser on back of toilet

And that’s it! So simple, right??!! And what a statement they make! And best of all, you didn’t have to hire it done! You did it!!

Until next time,

Happy Building, Friend!!

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