When it comes to lumber, you’ve come to the right place. We stock dimensional framing lumber in all popular standard sizes. We also have pressure treated posts & beams, decking, & landscape timbers. Knudson Lumber stocks the largest selection of timbers in Central Washington.  Along with an extensive inventory of quality Douglas fir, Knudson Lumber also stocks pressure treated lumber, cedar, LP products, Hardie products, and engineered wood products.  Interior finish lumber consists of clear hemlock, clear fir, oak, MDF, and finger jointed pine.  For all your lumber needs, you can count on the quality and quantity of inventory along with the superior customer service available at Knudson Lumber.

We will deliver your order right to your job site in convenient sorted bundles. You will find our lumber to be a better grade and higher quality than anything from a big box store. This better grade of lumber insures you will have less waste and save valuable time on your job. For your next lumber project think Knudson Lumber for quality wood at fair prices!

Doug Fir
Clear Cedar
TK Cedar
Cedar Decking
Composite Decking
T&G Decking
Railroad Ties

Sheet Goods
Particle Board
Specialty Plywood



Paint continues to be a key differentiator for driving customer traffic to home improvement stores like ours. While our customers can go online to look for color inspiration, our business remains the primary shopping destination for purchasing paint. Our people truly make the difference! We maintain a very knowledgeable support staff with years of service and training in the specialties of paint.

Rodda Paint
Rodda has been supplying products in the northwest since 1932. We carry Residential, Commercial and Industrial coatings as well as the supplies to apply them for a variety of specific uses.
Best Look – Do it Best Quality Paints™
Leveraging the strength of Sherwin-Williams
Produced by Sherwin-Williams, the largest paint manufacturer in the US, our Do it Best Quality Paints line of Best Look products is offered exclusively at Do It Best stores.

We have  thousands of colors and custom matching available options with our paints.

Paint Supplies
National & Private Label Brands
Of course, no paint department is complete without a full selection of applicators and supplies for getting the job done right. We provide our DIY, contractor and professional customers with paint sprayers, lightweight ladders, top-quality Best Look paint applicators, and more.
In addition, we carry ladders and related supplies to ensure you have everything you need to get the results you want. We also stock a large selection of stains and finishes.


Looking for new windows or replacement windows, doors for your home, shop or patio doors?  We have a large selection to choose from. We can order stock sizes or custom!

Whether you are building your dream home or remodeling the one you currently call home, we have new and replacement windows and doors to fit your style and budget. Our trained staff can assist you in ordering the right products, whatever your needs.

We offer the following lines of windows & doors (other brands available):

Exterior Doors
Alliance Door Products
Therma Tru

Interior Doors

Prime Windows
Milgard Windows

Door Hardware

Knudson Lumber carries exterior and interior door hardware by SCHLAGE and DEXTER. Need a new look for your kitchen or bathroom? Come and look at our selection of door pulls for cabinets. If we do not have in stock what you are looking for we can order it. Check out the inventory from Builder’s Hardware & Supply where we can order and bring to the store anything you see on the website!

Do you have a damaged door?

If you need to replace a door slab click HERE here for a Door Slab Measurement form.

Stop in and speak with one of our sales associates and they can help you pick the perfect door and/or window for your project



Our  store has a complete line of door knobs, locks, entry hardware and cabinet hardware. We also have hundreds of displays and access to an almost limitless assortment. So come on in and look around. We’ll help you make just the right choice. Check out the inventory from Builder’s Hardware & Supply where we can order and bring to the store anything you see on the website!


When it comes to our selection of hand and power tools and vast array of hardware, you’ll find everything you need for every home owner job. Knudson’s carries Milwaukee, DeWalt and Black and Decker power tools, including Circular Saws, Sabre Saws, Drills, Angle Grinders, Routers, & Belt Sanders.We also have Orbital Sanders, Hand Planers, Reciprocating Saws, Miter Saws, and a wide selection of Cordless Tools, Tool Kits, & Accessories.

We also carry Pneumatic Nail Guns and Compressors, as well as Salamander Heaters, Shop Vacs, and Generators.Our in-stock assortment of hand tools and supplies is 2nd to none.

Our display racks are always stocked and well organized. You’ll find Levels, Screwdrivers, Hack Saws, Putty Knives & Scrapers, Cold & Wood Chisels, Drill & Router Bits, Saw Blades, Chalklines, Pry Bars, and Wallpaper Tools.

Not only do we have it, but we have it in every shape size and color!Measuring Tools, Squares, Utility Knives, Surform Tools, Hammers, Nail Sets, Wrenches, Glue Guns & Sticks, Nut Drivers & Ratchets, Staple & Brad Guns, Riveters, Tool Boxes & Organizers, Saw Horses, Benches, Pliers of every shape and sort, Automotive Tools, Files, Socket Sets, Clamps & Vises, Specialty Tools, & Much More!

There is always someone available to help you with your tool selections and to answer any questions you have concerning your project or repair.


Solutions for those plumbing and electrical projects are just a step away when you shop at Knudson Lumber & Hardware. We have an extensive selection of parts for the Do it Yourselfers and professionals alike. Our friendly staff can assist you with your questions and finding the right products the first time. Your time is important to you and we’re here to help.

Our plumbing department carries (but isn’t limited to):

Pipe and fittings: pvc (dwv schedule 40, pvc pressure schedule 40), cpvc, galvanized, black iron, copper, copper flare, compression fittings, corrugated black drainage pipe
Valves: threaded and sweat, gas valves, ball valves, boiler drains, hose bibbs
Bath accessories
Bath light, ventilator and heater combinations
Garbage disposers
Pipe insulation
Plumbing repair parts
Pool chemicals
Range vent hoods
Sinks: composite and stainless steel
Submersible pumps and supplies
Toilets and supplies
Vinyl and rubber hose

Our electrical department carries (but isn’t limited to):

Ceiling fans, pedestal fans, and desktop fans
Circuit breakers and panels
Electrical wire
Extension cords
Fireplace tools and supplies
Fluorescent bulbs and fixtures
Light bulbs
Light fixtures: interior and exterior
Recessed lighting


The Beauty of Wood Made Better. LP SmartSide Trim & Siding. Beautiful. Durable. Workable.

LP SmartSide Trim & Siding products offer all the warmth and beauty of traditional wood, along with all the advantages of LP engineered wood.  The advanced technology actually improves upon nature, creating products that are far more durable and consistent than traditional wood.

The Making of a Dream Home

James Hardie creates innovative siding products that increases the beauty, value, safety and durability of your home.  Feel safe knowing that these siding products are resistant to just about anything mother nature can throw at them.

Made from the patented TEC™ process, MiraTEC® Treated Exterior Composite trim combines the eye-catching beauty of cedar with the long-lasting performance of an engineered product. Because it is not hardboard, MiraTEC trim will not delaminate, is moisture, rot and termite resistant, and is backed by a 50-year limited warranty.


Our expanded lawn & garden department offers a variety of products to help you properly care for your yard all year round, and give your home that added ‘curb appeal.’ Having product in stock isn’t enough when you’re trying to get a beautiful lawn. With Best Garden, Miracle Gro, Jobe and Scotts Lawn Care products in stock you can be certain to get the high quality products you need but you also get great advice on how to turn your lawn into the envy of the neighborhood.

We carry Carpinito Brothers high-quality bagged landscaping products

Carpinito Brothers high-quality bagged landscaping product are made with the highest quality all-natural ingredients,  their bagged landscape products are perfect for all your  landscape and garden needs.  Below are the Carpinito products we carry:

    • Chicken Manure
    • Organic Compost
    • Organic Potting Soil
    • Steer Gro
  • Top Soil

To find out more information about Carpinito Brothers, visit their website.

Our lawn & garden department carries (but isn’t limited to):

Bagged mulch, stone, compost, lime, potting soil, and top soil
Bagged sand, ice melt, and salt
Bird feeders and bird food
Grass seed, fertilizer, spreaders, and seeders
Garden hoses, sprinklers, and accessories
Insecticides, herbicides, and animal repellents
Landscape timbers, blocks, and fabric
Lawn trimmers, edgers, and leaf blowers
Poultry netting, fencing, and posts
Shovels and rakes
Wheelbarrows, storage bins, and hand trucks
Charcoal, lighter fluid, and grilling accessories
Flags and accessories
Large glove selection for all varieties of uses


 If you’re ready to begin a new deck project in Kittitas County or the surrounding area, Knudson Lumber has the expertise and composite decking selection to make it happen. Knudson Lumber stocks a wide variety of composite and wood decking products. Our knowledgeable staff enjoys helping homeowners find the perfect deck for their home or property. Our sales representatives will describe the benefits of each line and assist in the process of selecting and installing your new deck.

Composite Decking

Composite decking is highly durable, attractive and low-maintenance. Typically manufactured with a combination of recycled plastics and wood pulp, advances in composite decking have created realistic wood grain appearances with a broader spectrum of colors and sizes. This durability also makes composite decking an excellent choice for any high-use areas like outdoor seating, walkways and docks.

Why choose a Composite Deck?

  • Low maintenance
  • Warranty
  • Selection and versatility
  • Performance
  • Environmentally friendly

Composite Decking Available:

  • TimberTech
  • Azek
  • Trex

Wood Decking

Beautiful and durable, wood decks remain a tried and true favorite in the Northwest. Knudson has a great selection of pressure treated lumber in stock. With periodic maintenance, the beauty of a real wood deck will last for many years.

Why choose real wood?

  • Natural beauty
  • Affordability

Deck cleaners, sealers and stains available:

  • Penofin
  • Superdeck

Railings & Decking Accesories

Railing, postcaps and deck lighting all provide safety benefits, but they’re also great ways to add style to your outdoor area. The options for combining different style spindles, support posts, and caps are endless. Consider the character and aesthetic appeal of the finished deck; then select a elements that enhance the desired look while meeting all local safety standards.

Top brands include:

  • TimberTech
  • Fortress

North Idaho Energy Logs & Pellets

North Idaho Energy Logs Inc. has been manufacturing logs and other compressed wood products since 1986. We provide Renewable, Efficient manufactured logs and pellets for home heating. North Idaho Energy Logs products are a renewable energy source made entirely of wood by-products from sawmills. Energy Logs are a much cleaner burning fuel than firewood and other densified fire logs. Because of our manufacturing methods, Energy Logs create more heat with less particulate emissions, less ash and little or no residue.


Warmer: Produces more heat than firewood and other manufactured logs, 68,000 BTU’s per log (Approximately 8 lbs each).
Greener: 100% natural recycled wood with no chemicals or binders. Cuts emissions by more than 50%
Cleaner: No bugs or dirt with less ash and creosote means less maintenance for you!
Wiser: More heat and longer lasting for less money.


A roof has to perform two very important functions.

First – Your home needs to be protected from all of the varied types of weather that come along. From the extreme cold and icy weather of a Maine winter to the hot baking sun in the summer. A good roof will prevent water from coming inside and ruining ceilings, walls and the structural integrity of your home.

In addition to different weather, a roof needs to perform well in high winds, hail and other extreme weather events.

Second – A nice roof will make your home look beautiful. A roof needs to complement and enhance the look of the house. With a house design like a cape, the roof can be the dominant feature of the exterior of the house.

DIY? Although some simple roofs can be done by a skilled do-it-yourselfer, in most cases it is better to hire a competent professional roofer to do the job. Roofing can be heavy, bulky and hard to handle. A good professional roofer will have all the safety equipment, training, experience and insurance coverage to do a good job.

Some of the roofing products we carry or can supply are:

Roofing – Architectural shingles, laminated shingles, 3-tab shingles, metal shingles, metal roofing, ribbed metal roofing, hidden fastener standing seam, colored metal roofing, rolled roofing, corrugated fiberglass.

Roofing Accessories – Underlayments, felt, tar paper, Ice and water shields, vents, ridge vents, rolled ridgevents, step flashings, rolled flashing, drip edge, metal roofing boots, metal roofing trims

Knudson Lumber is able to order roofing materials from a variety of companies.  For more information on the products they carry click on the logo below.



If you’ve ever heard the expression ‘A penny saved is a penny earned’ it is important to know that that putting your ‘pennies’ into insulation will also save you ‘dollars’ in energy costs later on. A well insulated home will not only save you money on heating costs in the winter but will also keep you cooler in the summer.

Insulation and energy conservation products have changed a lot recently as have codes and recommended practices. We have the products and information you need to help you make the correct choices.

Some of the insulation products we carry or can supply are:
Premium-quality insulation and fibers,, Foam Sheets, Spray foam, Rigid foam, Fiberglass Froth Packs, Caulkings, Insulated Panels, Insulation Accessories, Ventilation Products, Weatherstripping, Pipe Insulation.

Knudson Lumber proudly carries Johns Manville Insulation Products!

Johns Manville’s residential insulation products help maintain energy efficiency and lower heating and cooling costs, making homes more comfortable year round. Johns Manville is committed to providing the high quality products, resources, guidance and on demand support you need on the job. Contact Knudson Lumber or visit our store to learn more about Johns Manville insulation!


We carry all of the sheetrock supplies and drywall tools to get the job done including sheetrock tape, tape dispensers, putty knives of all shapes and sizes, premixed mud, T-Squares, boards, cordless drivers /screws, corner bead and more.


Find Fasteners, Bolts, Nuts, and Anchors

Finish your home improvement project with any type of fastener at Knudson Lumber. Let our staff help you find what you need. Get hardware like structural bolts, machine screws, rivets, masonry fixings, and more.

Whether you need a single nail or full 50 pound boxes, Knudson Lumber has the products you need in the quantities you want. By the box, the pound, the package or the each, Knudson’s is your source for all things “nuts and bolts”.

Finish Your Project with the Right Supplies:
Stainless steel fasteners
Structural bolts and nuts
Chemical anchors
Masonry fixings
Holding down bolts
Threaded bar
Self-drilling tech screws
Machine screws
Senco fastening systems

Knudson Lumber is able to get hurricane ties, joist hangers, anchors and fasteners for concrete and masonry product and many more structural connectors from Simpson Strong-Tie.  For more information click here.

Mutual Materials Hardscapes

Knudson Lumber is your Kittitas County hardscape supply store, proudly carrying a large selection of Mutual Materials.  Come visit our store to view all the hardscaping products you need to create your own unique outdoor living space….we can also place special orders!

We carry Mutual Materials concrete retaining walls, paving stones, architectural slabs and lightweight outdoor porcelain tiles; all for your outdoor living space.

While we do not install, we work with the finest contractors, large and small, to provide the right contractor for you. Our customers. say….”the most helpful, knowledgeable staff we have found anywhere.”


Gear Up & Keep those drinks cool with YETI®

Get the latest YETI products at Knudson Lumber!

Top-rated YETI cups and coolers come in a range of new colors and sizes. Pick up a YETI 20 oz. or 30 oz. tumbler in many colors or the classic stainless steel. Read customer reviews and find out why so many people consider YETI a must-have brand and pick products like the top-rated YETI 30 oz. Rambler Tumbler Cup to keep beverages hot or cold.

YETI coolers make ideal gifts for the adventure seekers in your life or those who spend their weekends at tailgates. These top-rated coolers keep food cold for hours.

All hard-side and soft-side YETI coolers are extremely durable and deliver a rugged quality that’s perfect for just about anything outdoors. From camping trips to tailgates to backyard barbecues, this high-quality brand is built for the wild.