• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Marketinia

Marketing Solutions for Moving Forward

  • Home
  • Topics
    • Business
    • Construction
    • Family
    • Fitness
    • Furniture
    • Health
    • Swimming Pool
  • Ask a Question
  • Contact Us

What Is the Ideal Gap Between Decking Boards?

Last updated on September 13, 2014 by Sozo Staff Leave a Comment

deck chairs on a deckCustomers often know exactly what they (think that they) want in a deck, including the gaps between the boards. However, most of them just don’t realize that just like a stopped watch is right twice a day, their preferred decking board gap will only be achieved during a portion of the year. As an organic product, wood moves, expanding and contracting with the seasonal shifts in moisture levels. As a result of such fluctuations — never mind geographic considerations — opinions abound within the industry, when it comes to this issue of gaps between boards.

Predictability of Movement

Despite the frustrating reality of fluctuation, wood offers us this consolation: its movement is predictable. Since wood fibers act like a bundle of straws that sucks up moisture from the air, we can expect the board width to expand with increased moisture. Of course, prime deck-building season is during summertime, when the high humidity levels throughout much of the U.S. dictate that wood width is as swollen as it will be at any point in the year.

deck by a poolVariations in Movement

While each species moves a bit differently from other species, the movement properties of each is predictable, allowing you to plan for shrinkage based on the current temperatures and humidity levels, as well as the typical swing in the climate specific to your job site.

In addition to variations among wood species, you can expect different kinds of anisotropic movement, depending on the way the wood was cut. For instance, quartersawn boards move very little across the width, whereas flatsawn boards tend to move quite a bit.

(The differences are noted in the Popular Woodworking chart linked here.)

Spacing for Movement

decking with gapsAs you plan the gap between your boards, you’ll want to carefully consider the humidity level and time of year, as well as the species, realizing which direction the movement will go. For instance, if you are installing a deck in a humid climate during the summer, realize that the boards are as swollen as they will get, so placing them closer together will mean that you won’t have gaps later which will be wide enough for people to lose their keys or cell phones, even when walking across a snow-covered deck.

However, if you happen to install during cooler weather, that cool air can’t hold as much moisture, so your boards will probably expand later when temps are higher. If you place the boards too close to one another, you’ll lose more than your keys; you may lose out on the cost of that lumber when you have to rebuild the deck next year.

When it comes to ideal gaps, it’s really a personal choice, and whatever you or your customer prefers for when the gaps are widest, it won’t be that way during the season when they’ll use their deck the most. More important than the sizes of gaps is planning for the fact that gap sizes will change significantly throughout the year.

Picking lumber at J Gibson McIlvain
Picking lumber at J Gibson McIlvain

J. Gibson McIlvain Company

Since 1798, when Hugh McIlvain established a lumber business near Philadelphia, the McIlvain family has been immersed in the premium import and domestic lumber industry. With its headquarters located just outside of Baltimore, the J. Gibson McIlvain Company (www.mcilvain.com) is one of the largest U.S. importers of exotic woods.

As an active supporter of sustainable lumber practices, the J. Gibson McIlvain Company has provided fine lumber for notable projects throughout the world, including the White House, Capitol building, Supreme Court, and the Smithsonian museums.

Contact a representative at J. Gibson McIlvain today by calling (800) 638-9100.

Filed Under: Construction

Additional Articles

young teen girl leaning against pool wall
Keeping Up with Swimming Pool Material Innovation, Part 2
young toddler girl jumping into swimming pool
Keeping Up with Swimming Pool Material Innovation, Part 1
completed ipe back deck and stairs
Ipe Wood: An Unusual Lumber Species, Part 3
fresh ipe wood deck
Ipe Wood: An Unusual Lumber Species, Part 2
ipe decking boards
Ipe Wood: An Unusual Lumber Species, Part 1
busy logging operation in forest
Learning About Wood Movement, Part 1

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

20 + 1 =



Primary Sidebar

Lyon Financial

Featured Articles

  • Marine Grade Plywood Uses and Facts
  • Should I Use Genuine Mahogany or African Mahogany?
  • Product Review of NuCedar Materials
  • Cracks in Large Timbers: What Can You Do To Prevent Them?
  • Genuine Mahogany vs. African Mahogany
  • How to find an Alternative to Ipe as Prices Rise
  • What Is the Ideal Gap Between Decking Boards?
  • Wood Decking Species Choices: Red Balau
  • Pros & Cons of Tropical Decking Fastening Systems
  • Wood Decking Species Choices: Jatoba
X10 Home Automation

Popular Articles

  • How to Keep Track of Your Flash Drive
  • Stretching: Can There Be Too Much of a Good Thing?
  • Benefits of Ambidexterity
  • Should I Use Genuine Mahogany or African Mahogany?
  • Marine Grade Plywood Uses and Facts
  • How Much Is Your Trucking Business Worth?
  • What’s All the Excitement over X10 Home Automation?
  • Product Review of NuCedar Materials
  • Heated Driveway Installation by D'Amico Electric of Westchester, NY
  • The Truth About Recovering from Shoulder Labral Repair Surgery
  • Encourage Healthy Choices by Adding a Pool to Your Backyard

Reader Feedback

  • Alice Carroll on Gymnastics Tips: Back to the Basics with 6 Beginner Moves
  • Alice Carroll on The Vinyl Liner Pool Owner’s Guide to Swimming Pool Repairs
  • Alice Carroll on Concrete Sealer: What You Need to Know, Part 2
  • Alice Carroll on Vinyl Liner Options for Your New Swimming Pool
  • Afton Jackson on Pros & Cons of Fiberglass Swimming Pool Liners
  • Alice Carroll on Concrete Sealer: What You Need to Know, Part 3
  • Alice Carroll on Pros & Cons of Fiberglass Swimming Pool Liners

Copyright © 2023 Sozo Firm Inc · Privacy Policy · Disclaimer · Sitemap