Dunn Lumber
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A fourth-generation family business, we specialize in quality lumber and building materials, cabinets, decking, moulding, doors, and windows. Every week on our Dunn Solutions blog, we bring you trade tips and insights because we know the most important part of a successful project is feeling prepared. A trusted friend, we can help you with all your building needs. Locations and Hours:
Bellevue
06/25/2026
Do you know how to size deck footings and support posts?
Understanding tributary areas is critical to building a safe, long-lasting deck. It's how you determine how much of your deck's surface each post and footing is responsible for supporting, and how that load gets distributed across the structure.
In this guide, we walk through the basics of calculating tributary areas so you can choose the right materials and build with confidence.
Follow the link to get step-by-step instructions.
How To Calculate Tributary Areas for Decks One of the most common questions we get from people building a deck is how to properly plan for the size of their footings and support posts.
When working with manufactured decking, a little planning upfront can go a long way.
With a thoughtful design, you can use materials more efficiently, improve the overall look of your deck, and build a space that fits how you actually live.
In this guide, we share ideas to help you save money and get the look, layout, and function you want out of your deck.
Follow the link to learn more.
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Address
3801 Latona Avenue NE
Seattle, WA
98105
Opening Hours
| Monday | 7am - 6pm |
| Tuesday | 7am - 6pm |
| Wednesday | 7am - 6pm |
| Thursday | 7am - 6pm |
| Friday | 7am - 6pm |
| Saturday | 8am - 5pm |
