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Internet # 301913683

Model # 288741

Store SKU # 411310

4 in. x 4 in. x 6 ft. #2 Ground Contact Pressure-Treated Timber

  • 2X the protection compared to Above Ground treatment
  • Treated for protection against fungal decay, rot and termites
  • Ideal for decks, walkways, landscaping and other outdoor projects
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Product Details
Pressure treated deck at sunset to show stairs and an outdoor living space.

Add Value To Your Property

Studies show that adding a deck is one of the best ways you can increase your home's value.

Pressure treated deck overlooking a lake complete with pressure treated steps and Deckorail components

Building Code Approved

Pressure-treated decking is building code approved for use in decking in above-ground or ground contact applications.

Close up of the deck boards showing how to properly clean your deck

Extend The Life Of Your Deck

Your maintenance efforts will give you a pressure-treated project that looks bright and fresh for years to come!

A sunny day of a man using a powerwasher to clean his deck boards

Preventative Maintenance Plan

1. Depending on the location of your outdoor project with regard to direct sun exposure, foliage coverage, etc., it may be sufficient to clean/brighten and recoat every two years. 2. If you decide to wait two or more years to perform your next cleaning/brightening, you may want to use a power washer. Be sure that the cleaner/brightener you use contains a mildewcide.

Close up of the a generic paint can on deck boards

Choosing The Right Stain Or Paint

When determining the right stain and paint for your deck, consider what color will best enhance the wood's finish.

A close up of water beaded up on a deck board

Paint or Stain Tips

If you desire to paint or stain the treated wood project, it is important that the wood be dry enough to accept a coating. The best way to determine if the wood is sufficiently dry to paint or stain is to sprinkle droplets of water onto the wood. If the water droplets are absorbed, the wood is ready to be painted or stained. If the water droplets bead on the surface of the wood, it is too wet. You should wait a few days before attempting to paint and stain the wood.

Close up of a non color additive pressure treated deck board

No Color Additive

Weathershield Pressure-Treated Lumber

Close up of a cedar-tone pressure treated deck board


Weathershield Pressure-Treated Cedar Tone Lumber

Close up of a redwood-tone pressure treated deck board


Weathershield Pressure-Treated Redwood Tone Lumber

Close up of a pressure-treated post with Deckorail solar and ball top post caps

Post Caps

Post caps add the finishing touch to your deck, porch, or fence project. What's more, they protect your post from nature's elements.

Close up of a pressure-treated double v and square edge posts

Deck Posts

Deck posts add a classic, decorative charm to your outdoor living space all while adding support to your deck, fence or porch.

Close up of a pressure-treated B2E baluster and square edge spindle

Balusters & Spindles

Treated balusters are used not only for safety and strength, but they also aid in creating a custom look to your railing project.

About This Product

Pressure-treated timbers are treated for protection against termites and rot. Ideal for a variety of applications including decks, play sets, walkways and landscaping projects where lumber is exposed to the elements. When used properly, it is both safe and environmentally friendly.Treated wood is typically still wet when it's delivered to The Home Depot or job site. As it dries, you should expect slight changes in width and length. As lumber dries, it may split, cup and warp. This is more likely to occur to occur in lower-grade boards, where knots and uneven grains are already present. Each piece of lumber is unique and carries physical characteristics that may include the following: knots, warping, shrinkage, swelling and/or splitting.


  • Made of pine
  • For use at ground contact
  • Significantly improved corrosion resistance for metal fasteners
  • Lifetime limited residential warranty
  • 3-1/2 in. x 3-1/2 in. x 6 ft.
  • Stainable and paintable
  • No two pieces of lumber are the same.
  • Color, grain pattern and texture will vary as well.
  • Use #2 grade lumber when both appearance is not the most important to you project.
  • May have wane (bark edge) on corners
  • Use #2 grade lumber when strength is the main feature you are looking for on your project.
  • Find everything you need to complete your decking project here
  • Note: product may vary by store
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 301913683

Model # 288741

Store SKU # 411310



Actual Product Length (ft.)

6 ft

Actual Product Thickness (in.)

3.5 in

Actual Product Width (in.)

3.5 in

Nominal Product Length (ft.)

6 ft

Nominal Product Thickness (in.)

4 in

Nominal Product Width (in.)

4 in


Chemical retention (lb./cu. ft.)

.14 lb/ft3

Fastener Recommendation

Galvanized Fastener


Paintable, Stainable

Lumber Grade

No. 2

Lumber quality




Moisture content


Pressure treatment chemical

MCA - Micronized Copper Azole



Wood Species


Warranty / Certifications

Manufacturer Warranty

See store for details

Questions & Answers

Q:Can I get a 4x4 lumber beam cut into four pieces
by|Jan 23, 2024
1 Answer
Answer This Question

A:  Bigsmooch, please contact a Pro associate at your local Home Depot store to see about the availability of this particular service in your area.

by|Jan 23, 2024
    Q:I'm about to place a pickup order for a 4�4�4ft . Is it possible to leave detentions and the could cut it for me please I just need 5 / 4" and 1/ 6" ?
    by|Jan 3, 2024
    1 Answer
    Answer This Question

    A:  Christina, we would recommend reaching out to the Home Depot store where you are placing the pick-up order to inquire if this service is available at the location.

    by|Jan 5, 2024
      Q:Can I mount a heavy bird feeder on top by using a mounting cap screwed into the post.
      by|Nov 25, 2023
      1 Answer
      Answer This Question

      A:  John, this timber is ideal for decks, walkways, landscaping, and other outdoor projects. It can be used for this purpose.

      by|Mar 17, 2024
        1 found this answer helpful
        Q:how many posts are needed to install 140' of 8"panels of fencing with two gates
        by|Jul 10, 2023
        1 Answer
        Answer This Question

        A:  Higgins, To better answer your question, please contact the HD.com customer service department at 800-430-3376. Call any day between 6 A.M. and 2 A.M. EST or call your local store. They can either answer your question or transfer you to your local store to answer your specific question.

        by|Jul 11, 2023
          Showing 1-4 of 29

          Customer Reviews

          4.6 out of 5

          • 4.6 out of 553 reviews
          • 93% recommend this product
          Filter by:
          Showing 1-10 of 553 reviews
          I needed to replace a fence post and the 6 foot length was perfect for my fence height and placing into an 18 inch hole.
          Response from UFPI RepresentativeMar 22, 2024
          Dear WJB, Thank you for the positive review! ProWood really appreciates your business. If there is anything else that we can do for you, please e-mail our customer service department at CustomerService@ProWoodLumber.com, and one of our representatives will be happy to assist you.
          • Verified Purchase
          New mailbox
          Used this 4 x 4 to install a new mailbox. It was 6 ft in length. I dug a 3 ft hole for the post leaving 3 ft which the new mailbox fit on perfectly. The whole project took less than 1 hr.
          Response from UFPI RepresentativeMay 3, 2023
          Dear Bell Cheer, thank you so much for your wonderful review. Our customers do so many creative and clever things, so we love to hear how our products fit into your ideas! Thank you for sharing! If there’s anything else we can help you with, please e-mail our customer service department at UFPRetailCS@UFPI.com, and one of our representatives will be happy to assist you.
          • Verified Purchase
          • Recommended
          Does the job
          Does the job
          • Verified Purchase
          • Recommended
          As it should be...
          As it should be
          • Verified Purchase
          Just what I wanted for the new bluebird houses. ...
          Just what I wanted for the new bluebird houses.
          • Verified Purchase
          1 found this review helpful
          Used for a mailbox post. Worked fine.
          Used for a mailbox post. Worked fine.
          • Verified Purchase
          • Recommended
          3 found this review helpful
          • Verified Purchase
          • Verified Purchase
          The posts function well.
          Response from UFPI RepresentativeApr 17, 2024
          Dear HomeDepotCustomer, thank you for sharing your experience with ProWood. Your feedback is truly valued. If you have any further questions or need assistance, please don't hesitate to reach out to our customer service team at CustomerService@ProWoodLumber.com. We are here to help!
          • Verified Purchase
          • Verified Purchase
          Showing 1-10 of 553 reviews