Key takeaways
- About 95% of the market uses 8 1/4-inch lap siding, which shows 7 inches of the board once installed.
- The 8 1/4-inch board is the only locally stocked size, so it costs less and can arrive the next day.
- Custom sizes are sold in 1,400-square-foot lots, so a 1,450-square-foot job could mean buying 2,800 square feet.
- Other options include 4-inch, 5-inch, 6-inch, and 11-inch exposures in smooth or wood grain textures.
- The 11-inch option must be face-nailed, which leaves visible nails across the house.
The right board size matters when you replace cedar or narrow vinyl with James Hardie siding. For most homes, the most practical lap siding width is 8 1/4 inches, which shows a 7-inch exposure. About 95% of the market uses this size.
It is stocked locally, it arrives the next day, and it costs less than any custom size. It has also been the standard look on homes for about 20 years. Below, we explain why it works and what other sizes are available.
Why Homeowners Choose James Hardie Lap Siding
Many of the homeowners we talk to have cedar lap siding or vinyl siding on their homes now. They come to us looking for an upgrade that lasts longer and looks better from the street.
Moving Up from Cedar or Vinyl
James Hardie lap siding appeals to these homeowners for its durability, low maintenance, and strong curb appeal. Vinyl in particular tends to come in very narrow boards, so size becomes an important decision when switching to fiber cement.
The Question that Comes Up Most
Once a homeowner decides on James Hardie, the next question is almost always about size. They want to know which widths are available and which one will suit their home. The rest of this guide answers that question.
The Most Common Lap Siding Width for Homes
Roughly 95% of the lap siding market is the 8 1/4-inch board. It is the size we install on most of our siding projects, and it is the one most homeowners choose.
What a 7-Inch Exposure Means
An 8 1/4-inch board does not show its full width on the wall. Each row overlaps the one below it, so you see about 7 inches of each board. That visible portion is called the exposure.
When you compare siding sizes, keep both numbers in mind:
- Board width: 8 1/4 inches
- Exposure: 7 inches, which is what you actually see from the street
Where the Size Comes From
The 7-inch exposure matches what aluminum siding historically used. Fiber cement lap siding largely followed that same familiar look, which is part of why it became the standard.
Pro Tip: When you talk with a siding contractor, ask about the exposure as well as the board width. The exposure is what shapes the look of your home.
Why the Standard Size Costs Less
The main reason 95% of homeowners end up with the 8 1/4-inch board is simple. It is the only lap siding size that is stocked locally, which makes it far more economical than anything else.
Locally Stocked and Ready the Next Day
Because suppliers keep it on hand, we can buy the 8 1/4-inch board by the piece. We order exactly what your home needs and have it the next day. That keeps your project on schedule and avoids paying for extra material.
The Problem with Custom Orders
Other sizes have to be custom ordered, and they are sold in lots of 1,400 square feet. That creates waste on most projects. Here is an example:
- Your home needs 1,450 square feet of siding.
- One 1,400-square-foot lot falls 50 square feet short.
- You have to buy a second lot, for a total of 2,800 square feet.
Paying for nearly twice the siding your home needs is not realistic for most homeowners.
Need expert help choosing your siding? Contact Fairway Exteriors for a free consultation.
Other Siding Sizes and Textures We Offer
The 8 1/4-inch board is the most common choice, but it is not the only one. We also install narrower and wider exposures, and you can choose between different textures.
Choosing an Exposure Outside the Standard
We install 4-inch, 5-inch, and 6-inch exposures for homeowners who want a narrower look. A wider 11-inch exposure is also available.
The 11-inch option is not a popular choice. It has to be face-nailed, which means the nails show on the surface of the siding. Most homeowners do not want to see 4,000 nails across the outside of their home.
| Siding Option | How It Is Sourced | Cost | What to Know |
| 8 1/4-inch board (7-inch exposure) | Stocked locally, bought by the piece, next-day delivery | Most economical | Used on about 95% of homes |
| 4-inch, 5-inch, 6-inch exposure | Custom order in 1,400-square-foot lots | Higher, due to extra material | Narrower look |
| 11-inch exposure | Custom order in 1,400-square-foot lots | Higher, due to extra material | Must be face nailed, so nails are visible |
Smooth or Wood Grain Texture
Texture is another choice to make. Lap siding comes in a smooth texture for a clean finish or a wood grain texture for a look closer to natural wood. Between sizes and textures, homeowners have plenty of options.
Why Most Homeowners Stick with 8 1/4-Inch Siding
Cost and logistics lead most homeowners to the 8 1/4-inch board. Its familiar look is another strong reason to choose it.
A Look People Recognize
The vast majority of lap siding jobs use this size, and that has held true for about 20 years. When you see wood lap siding or James Hardie lap siding on a home, you are almost always looking at a 7-inch exposure.
A Safe Choice That Saves Money
The 8 1/4-inch board gives homeowners three clear benefits:
- Comfortable: It looks right because people are used to seeing it.
- Repeatable: It is the proven standard on homes across the market.
- Affordable: It saves homeowners a lot of money compared with custom sizes.
Pro Tip: If you are unsure which size to pick, the 8 1/4-inch board is the safest choice. It is the look people are used to seeing, and it keeps your budget in check.
Frequently Asked Questions
- What Does Siding Exposure Mean?
Exposure is the part of each board you can see after installation. Each row overlaps the one below it, so an 8 1/4-inch board shows about 7 inches.
- Why Do Custom Siding Sizes Cost More?
Custom sizes are sold in 1,400-square-foot lots. If your home needs 1,450 square feet, you would have to buy 2,800 square feet. The standard size can be bought by the piece.
- Is 11-Inch Lap Siding a Good Option?
It is available, but few homeowners choose it. The 11-inch option must be face-nailed, which leaves thousands of nails visible on the outside of the home.
- What Textures Does Lap Siding Come In?
Lap siding is available in a smooth texture and a wood grain texture.
Get the Right Siding for Your Home
For most homes, the 8 1/4-inch board with a 7-inch exposure is the practical choice. It is locally stocked, available the next day, and the most economical option on the market. It also gives your home the familiar look that has been the standard for about 20 years.
If you want a narrower 4-inch, 5-inch, or 6-inch exposure, a wider 11-inch exposure, or a smooth or wood grain texture, we can walk you through the cost and look of each option.
Fairway Exteriors helps Kansas City homeowners upgrade from cedar and vinyl to James Hardie siding. Contact us today to schedule your free consultation, and let our team help you choose the lap siding width that looks best on your home.
