Northern KDAT Decking from Northern Crossarm is the rich, prefinished lumber product you’ve been waiting for.

Call 715-723-4100

The Nation’s #1 Brown Treated Wood Supplier


KDAT Decking

Northern KDAT Decking is uniquely designed by Northern Crossarm Company. Northern Crossarm’s Northern KDAT Decking boasts a traditional radius edge profile, stress relief cuts and a 1-3/8″ thickness for greater stability. Each deck board is coated in a rich brown finish for a finished look.

Northern KDAT Decking Benefits

Find A Dealer

Looking for your nearest KDAT lumber dealer? We have stocking yards throughout the United States.

“Northern Crossarm’s KDAT Brown product line is still our best selling point.”

David Albers, Lampert Lumber – Faribault, MN

Northern KDAT Decking Photo Gallery

Northern KDAT Decking FAQ & Information

Northern KDAT Decking FAQ

Common Questions About Northern KDAT Decking

Watch this short, 1-minute video about the 6 benefits of brown treated wood.

Northern KDAT Decking is thicker, coated in a rich brown finish and Kiln Dried After Treatment – That means, it’s more stable with a beautiful appearance and less likely to warp, twist and cup.

Northern KDAT Decking is Kiln Dried After Treatment. It’s extremely important to add a 1/4″ – 3/8″ gap between each Northern KDAT Decking board at install. We have our own KDAT Spacing Tool to make sure that install is done correctly.

To find your nearest brown treated wood dealer or retail location, please give us a call at 715-723-4100, or send us an email with your name and zip code to

Northern KDAT Decking Resources

FREE 37-Page KDAT Lumber Guide

The Ultimate Guide to KDAT Lumber

Kiln Dried After Treatment (KDAT) wood is pressure treated lumber that’s been dried after the pressure treating process to deliver better resistance against warps, cups, twist and checks.

Northern KDAT Decking Articles

90-Day Stocking Dealer Program

Try our top-selling KDAT for 90 days, risk free – if it doesn’t sell, we’ll pay to ship it back!