Does shiplap need an expansion gap?

Author: Tomasa Frami  |  Last update: Sunday, April 26, 2026

When shiplap is properly acclimated, a 1/16" gap is recommended for all end-to-end butt joints to allow for adequate expansion and contraction of shiplap. Continue fastening shiplap by leaving approximately 1/32" between the shiplap for expansion and contraction.

Should you leave a gap in shiplap?

Once the shiplap boards are installed, there should be a 1/8'' -- 1/4'' gap between the edges of the board and the ceiling edge to allow for any expansion or contraction of the wood. This gap can be covered up by trim.

Are you supposed to space shiplap?

Place Nickel Spacers

Before you attach the next board, place a nickel every few feet. Put the nickel between the bottom board and the board above it. This will give you an authentic shiplap look.

What is the best gap for shiplap?

Whether you install it on a wall or a ceiling, horizontally or vertically, Timeless nickel gap shiplap is the easiest way to get uniform , one-eight-inch gaps between planks.

Does shiplap expand and contract?

Its uses and benefits go beyond the well-planned accent wall and into other rooms in the home and to the home exterior. Hidden grooves form a secure, even fit between the boards, with just enough flexibility for the wood to safely expand and contract over time long after installing.

15 Shiplap Don'ts | What NOT to do When Installing Shiplap

Does shiplap need expansion gap?

When shiplap is properly acclimated, a 1/16" gap is recommended for all end-to-end butt joints to allow for adequate expansion and contraction of shiplap. Continue fastening shiplap by leaving approximately 1/32" between the shiplap for expansion and contraction.

What are the downsides of shiplap?

Shiplap is Not Waterproof or Moisture Resistant

The wood planks are usually sealed with paint or stain, but this doesn't fully protect against water. If you need water-resistant material for an area prone to high humidity or dampness, consider using vinyl planks or other moisture-resistant shiplap.

Should shiplap be nailed or screwed?

What nails to use to install shiplap cladding. Galvanised nails should be used; this will prevent staining occurring in the event of corrosion. As with screws, nails should be at least 2.5 times the thickness of the board.

How far apart do you put furring strips on shiplap?

We recommend installing furring strips into the studs horizontally every 24 inches. The furring strips create a secure base for the shiplap since they are nailed directly to the studs. Shelby opted for installing furring strips every four feet than the two feet we normally recommend.

Can you do too much shiplap?

As much as we love shiplap, there can be a time and a place when there is too much shiplap. When you want to fully decorate the walls with shiplap, it is best to stick with soft, neutral colors and limited texture.

How much of a gap is in shiplap?

Typical nickel-gap installation allows for a 1/8" gap between boards that is covered by the lip of each board. Our shiplap paneling can be installed with the gap or with the boards pushed together.

Is it better to smooth or rough shiplap?

Shiplap is either rough sawn or milled lumber that has a left-handed and right-handed lip on either side of the board. This lip allows the board to fit easily and smoothly together.

What causes shiplap to buckle?

High Humidity

Wood naturally absorbs the moisture in the air and expands, which causes warping or buckling. Additionally, high humidity levels can lead to other issues like mold. Any moisture trapped under paneling can increase the risk of warped paneling or hidden mold growth.

Can I install shiplap directly to studs?

You can install shiplap directly to your studs to save on time, money, and mess.

Should I use 16 or 18 gauge nailer for shiplap?

We recommend using 16- or 18-gauge finish or brad nails. 1-½” to 2” in length should be sufficient. Both gauges are strong enough to hold the lumber securely, but small enough to not leave a large hole on the face of the board. Go ahead and buy the bulk pack: you're going to need it!

Should furring strips be vertical or horizontal?

For this reason, furring strips should always be installed vertically to establish an effective drainage plane that helps water runoff flow downwards. Install the furring strips between the housewrap and the siding, leaving a significant gap between each strip to allow enough airflow to help with ventilation needs.

Which direction does shiplap go?

While vertical shiplap can make a room appear larger, horizontal shiplap can widen the look of a room, like in this powder room. Although it's a small room, the horizontal shiplap treatment broadens the look.

How to finish inside corners of shiplap?

You may apply caulk before applying trim, though it's not required. Quarter-round molding is one of the best materials to finish internal shiplap corners. It provides a polished and professional finish that rounds out the installation perfectly.

Do you nail shiplap through the tongue?

To make sure boards are evenly spaced, place a nickel or quarter between the boards as a spacer. Some people like the look of visible nail heads on shiplap. To avoid visible nail holes, nail boards through the rabbet or tongue.

Why not to use shiplap?

The wood ends up painted an accent color and it provides no real value to the room. In fact it can cause a room to look odd or out of place. Add to this the wood that is often available for shiplap is generic boards or even plywood.

What is the new trend instead of shiplap?

Faux-brick paneling may be a great shiplap alternative for you. It is better for renters as it is easy to install (just peel and stick) and easy to take down without damaging the wall underneath. Faux-brick paneling can be an easy DIY, saving you the costs of installation.

Should I use 6 or 8 inch shiplap?

Key Takeaway: Picking a shiplap width can be a big decision, since it'll likely have a big impact on your living space. Six-inch wide boards are commonly used to create rustic, cozy atmospheres. For those working with larger areas or needing a bit more dramatic effect, eight-inch panels might be a better choice.

Is it cheaper to drywall or shiplap?

Is it cheaper to shiplap or drywall? Drywall is generally cheaper than shiplapping walls, with an average cost of around $1.50 - $2 per sq foot. However, shiplapped walls bring a unique aesthetic to rooms that drywall can't match. For this reason, many homeowners find that the higher price point is justified.

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