Learn how Tenhulzen Construction and Dunn Lumber helped revitalize a PAWS animal shelter for animals and staff.
- Posted: 12.08.2025Read Article
Contractor Resources
As a contractor, there's a lot to keep in mind to run a smooth business. Whether you need advice on project management or job site professionalism to ensure efficiency and safety on every project, we'll provide you with the knowledge you need to be successful on the modern worksite.
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CONTRACTOR LIABILITY INSURANCE SERIES
Learn the basics of contractor liability insurance, including how to read your policy, manage risk, choose an agent, and find better rates.
- Posted: 07.04.2021Watch Video
From how to read your policy to understanding Washington laws that may impact you, we're covering everything you need to know about contractor liability insurance for your business in this new series.
- Posted: 28.04.2021Watch Video
In this episode, we go over the basics of what contractor liability insurance is, who needs it, and what it covers.
- Posted: 04.05.2021Watch Video
Today, Shelli takes us step by step through the different parts of a base policy and then explains how to read and understand your contract liability policy.
- Posted: 06.05.2021Watch Video
Having contractor liability insurance is just one way to protect your business and risk. In this episode, Shelli shares why it’s important for contractors to work with a risk management specialist (risk manager) in addition to their insurance broker.
- Posted: 12.05.2021Watch Video
We’re covering contractor liability insurance exclusions, including what they are, how to identify them, and why it’s crucial to be aware of them before you choose a policy to ensure your business is protected.
- Posted: 05.08.2024Watch Video
Not all contractor liability insurance agents are created equal. In this episode, Shelli walks us through how to find quality contractor liability insurance agents you can trust, particularly in Washington state and King County.
- Posted: 20.05.2021Watch Video
In this episode about contractor insurance, Shelli shares how policies are calculated and how full transparency with your agent is the best approach.
- Posted: 18.03.2024Watch Video
In this episode, Shelli talks about different types of insurance carriers, how they function, and offers a word of caution when applying.


Business Advice
Practical tips and strategies to help you streamline your contracting business and strengthen client relationships.
- Posted: 23.11.2020Read Article
Building successful supplier/customer relationships is an important part of working in this industry. Here's how we maintain great relationships at Dunn Lumber.
- Posted: 04.10.2022Read Article
Contracts don't need to be long to be thorough. In this episode of the Solutions podcast, Seth Millstein gives us his contract writing tips straight from the attorney's desk.
Featured Guide
UNDERSTANDING LUMBER TYPES AND SIZING
Explore how lumber is sized, measured, milled, and cut, along with the differences between traditional and engineered wood products.
- Posted: 27.12.2021Watch Video
Wood Technology Center instructor Dave Borgatti gives us a brief history of lumber manufacturing and how lumber sizing and naming have evolved over the years.
- Posted: 21.02.2022Watch Video
Why is a two-by-four not actually a two-by-four? In this discussion with Dave Borgatti of Seattle's Wood Technology Center, we explain the difference between nominal and actual lumber size and learn some helpful tips and best practices.
- Posted: 21.03.2022Watch Video
How do you calculate board measure, and why would you ever need to? In this episode of our Wood Technology Series, we get into the details of calculating board measurement and explain the nuances every tradesperson should be aware of.
- Posted: 28.11.2022Watch Video
With the right skills and tools, you can buy rough lumber and take it all the way down to surfaced, finished, usable product for a job.
- Posted: 04.04.2022Watch Video
Understanding different milling methods is critical to selecting the right lumber product. Learn how to tell the difference between a quartersawn, rift-sawn, and plain-sawn piece of lumber in this installment of our Wood Technology series.
- Posted: 09.01.2023Watch Video
Join us on the job site to learn about what goes into making grade-A plywood.
- Posted: 07.02.2022Watch Video
At Dunn, we know wood is our greatest renewable resource, which is why engineered lumber is such an important product. In this video, learn why engineered wood is so sustainable—and why some prefer it to natural lumber.
ENERGY RETROFIT SERIES
Mark LaLiberte and Daniel Westbrook discuss climate in the Pacific Northwest, managing humidity, and other ways to protect your home during a remodel or energy retrofit.
- Posted: 19.11.2018Watch Video
Mark LaLiberte and Daniel Westbrook discuss climate in the Pacific Northwest, managing humidity, and other ways to protect your home during a remodel or energy retrofit.
- Posted: 07.01.2019Watch Video
Mark LaLiberte and Daniel Westbrook offer tips on how to make energy efficient upgrades that promote health, durability, and safety.
- Posted: 04.02.2019Watch Video

Considering an upgrade to your vintage or historic home? In this ongoing energy retrofit series, master craftsman Daniel Westbrook interviews industry expert Mark LaLiberte, founding partner and president of Construction Instruction. Mark has been educating the building industry on the science and physics of construction for more than 30 years, and is sharing the benefits of constructing durable, energy efficient, healthy homes in this series.
Here are a few things you’ll learn in this video:
Practical Things You Can Do to Save Energy
Many times, attics don’t have much insulation. One way to save energy is to work with a company that will first bring in a large vacuum to suck out whatever insulation is in the attic and clean up any mess made by animals and rodents who have made their way into the space. Once things are cleared out, you’ll discover gaps and holes—and likely feel air blowing in your face. To solve for this, fill gaps and holes with foam and caulk. Once you've
- Posted: 04.03.2019Watch Video
Daniel Westbrook and Mark LaLiberte offer insulation recommendations and tips to help maximize your home's energy efficiency.
- Posted: 27.05.2019Watch Video

Considering an upgrade to your vintage or historic home? In this ongoing energy retrofit series, master craftsman Daniel Westbrook interviews industry expert Mark LaLiberte, founding partner and president of Construction Instruction. Mark has been educating the building industry on the science and physics of construction for more than 30 years, and is sharing the benefits of constructing durable, energy efficient, healthy homes in this series.
In this video, you’ll learn how air movement affects air quality in your house. Here are two key takeaways:
Misconception: a leaky house has good air quality
There are a few misconceptions around air movement and air quality, and some very important truths. One misconception is that a leaky house has good air quality—that’s not always the case. You could be bringing in air from many places that have a less-than-ideal or even harmful air quality, whether it’s air from a backyard or dog kennel or from a basement or crawlspace. The better
- Posted: 02.12.2019Watch Video
In this episode of our energy retrofit series, Daniel and Mark are chatting about historic windows and whether it is better to repair or replace them.
- Posted: 20.07.2020Watch Video
In this series, master craftsman Daniel Westbrook interviews industry expert Mark LaLiberte, the founding partner and president of Construction Instruction. Mark has been educating the building industry on the science and physics of construction for more than 30 years and sharing the benefits of constructing durable, energy efficient, healthy homes. In today’s video, Daniel and Mark discuss how to maintain the energy efficiency of a historic home.
- Posted: 17.08.2020Watch Video
In this series, master craftsman Daniel Westbrook interviews industry expert Mark LaLiberte, the founding partner and president of Construction Instruction. Mark has been educating the building industry on the science and physics of construction for more than 30 years and sharing the benefits of constructing durable, energy efficient, healthy homes. In today’s video, Daniel and Mark discuss resources that are available to the contracting community to learn about retrofitting historic homes.
- Posted: 21.12.2020Watch Video
Today, we're sitting down with Mark to talk about the future of energy efficiency—and how it's changing the landscape of construction as we know it.
Workforce Development
- Posted: 01.03.2021Read Article
We're sharing insights from carpenter Gary Katz on how professionalism can help trade workers earn clients' respect and strengthen the industry as a whole.
- Posted: 09.07.2018Watch Video
Gary Katz of Katz Roadshow and THISIsCarpentry talks about the current shortage of skilled tradespeople and the value of using your hands to build something lasting and visible.
- Posted: 08.07.2019Watch Video
After our Outdoor Living series, Ben Middlemiss, president of London Design Build, and Jason Cameron, contractor and DIY TV host, stuck around for a conversation that explores their own career paths and why they enjoy the Trades profession.
- Posted: 23.12.2019Read Article
In this first installment of our three-part series, Sarah from Sawhorse Revolution gives a history of shop classes and explains why there are fewer of them today.
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COMMUNITY SPOTLIGHT
- Posted: 06.10.2026Read Article
Get to know the benefits and installation best practices for ROCKWOOL Comfortboard® 80 Thermal Insulated Sheathing.
- Posted: 22.09.2026Read Article
Wherever you are in your project, get key insights and install tips for Blueskin VPTech Panels.
- Posted: 08.09.2026Read Article
Get to know the benefits and best practices for the ZIP System™ R-sheathing product from Huber Engineered Woods.
- Posted: 25.08.2026Read Article
The Dunn Lumber Gallery brings premium windows, doors, cabinets, and countertops together in one inspiring Seattle showroom.
- Posted: 28.07.2026Watch Video
Not all decking performs the same in the sun. Learn how your decking type and color can make all the difference in the heat.
- Posted: 30.06.2026Read Article
Keep keys and other everyday essentials organized with a creative DIY holder featuring a clever puzzle-like design and built-in tray.
- Posted: 02.06.2026Categories: Product KnowledgeWatch Video
TimberTech’s aluminum framing offers lightweight strength, easy installs, and lasting durability for any deck project.
- Posted: 25.08.2026Read Article
The Dunn Lumber Gallery brings premium windows, doors, cabinets, and countertops together in one inspiring Seattle showroom.
- Posted: 25.11.2024Read Article
Learn about a Seattle non-profit, Sawhorse Revolution, that is using carpentry to improve the community and support youth development.
- Posted: 27.03.2023Read Article
We’re catching up with Jonathan Cohen, Ebanista School of Fine Woodworking’s director, to learn more about his journey and see how he’s supporting a new generation of skilled woodworkers.
- Posted: 24.08.2020Read Article
This female lead carpenter realized traditional safety harnesses weren’t effective for women. She and her company spoke to the manufacturer and came up with a version to keep her safe.
- Posted: 09.11.2020Read Article
Dunn Lumber recently partnered with Habitat for Humanity Seattle-King County on a home repair for a family in need.
- Posted: 02.03.2020Read Article
In this Rampathon feature, we sat down with Daniel Bower of Jackson Design-Build to discuss what the charity event means to him and his team.
- Posted: 08.06.2023Read Article
Housing accessibility is one of our region’s great challenges, and we’re proud to see fellow businesses in the homebuilding space using their expertise to make a positive impact in our community.
- Kat Coshow - February 26, 2026
The all-new Dunn Solutions Blog combines home improvement advice, DIY tutorials, and contractor resources all under one roof.
- Jim Coshow - November 01, 2025
We're matching donations (up to $500!) to Northwest Harvest through December 5. Join us!
- Jim Coshow - October 07, 2025
"Mark and Rob share stories and examples that illustrate how to build homes that last and how energy codes can impact different systems for ventilation, insulation, and moisture."
- Jim Coshow - August 12, 2025
Learn how Tenhulzen Construction and Dunn Lumber helped revitalize a PAWS animal shelter for animals and staff.
- Jim Coshow - July 08, 2025
Tips on designing Pacific Northwest outdoor living spaces—from planning and permitting to materials, budgeting, and modern features.
- Jim Coshow - June 17, 2025
What goes into building a deck that stands up to Seattle’s weather? A local builder weighs in.













































