Post Protector 4 in. x 4 in. x 3-1/2 ft. Fence Post Protector-4442 at The Home Depot

Post Protector

Model # 4442

Internet # 203165674

4 in. x 4 in. x 3-1/2 ft. Fence Post Protector

Post Protector 4 in. x 4 in. x 3-1/2 ft. Fence Post Protector

This item has been discontinued.
The Home Depot no longer carries this specific product.

$19.99 / each


In Stock



Model # 4442

Internet # 203165674

Post Protector is a slide-on barrier system protecting in-ground posts from decay by eliminating soil-to-wood or concrete-to-wood contact. Decay occurs when the following conditions exist: Moisture saturation of wood fiber, Oxygen, Temperature 40 -100 degrees Fahrenheit. These conditions enable the soil dwelling micro-organisms, to colonize the post using the wood fiber as their food source. This consumption of the wood fiber is otherwise known as decay or rot. Post Protector allows for typical post-in-ground foundations without the decay causing micro-organisms ever having access to the post. The treatment in a pressure treated post is a pesticide used in an effort to make the wood fiber an undesirable food source for these micro-organisms. The treatment is effective initially but loses its effectiveness as the chemical migrates or leaches from the post over time. Post Protector eliminates this chemical migration and keeps the treatment with the post where it belongs. Common applications are decks, pergolas, fences, pole barns, or any post-in-the-ground project. Available in 4x4, 4x6 & 6x6 in 42 in. and 60 in. lengths.

  • Simple slide-on installation
  • HDPE- material has 400 plus years of in-ground useful life
  • Light weight, flexible and strong
  • Attractive appearance-rich clay tone color with wood grain texture
  • Easily trims to desired height above grade
  • Integral uplift protection
  • Stronger, faster, and less expensive than concrete pier and steel bracket method
  • Protects post from weed eaters
  • Net opening size is 3-3/4 x 3-3/4
  • Includes(4 per post) 1/4 in. x 1-1/2 in. galvanized lags with EDPM bonded washers to attach post protector to post
  • Use attachment lags near grade level for ease of post removal/replacement

Info & Guides

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Actual post height (in.)  42  Actual post thickness (in.)  3.75 
Actual post width (in.)  3.75  Assembled Depth (in.)  4 in 
Assembled Height (in.)  42 in  Assembled Width (in.)  4 in 
Cap/top included  No  Color Family  Brown 
Color/Finish  Brown  Commercial/Residential Use  Commercial / Residential 
Fencing Product Type  Composite Posts  Manufacturer Warranty  30 day manufacturer defect 
Material  Composite  Number of posts included 
Product Weight (lb.)  2 lb  Returnable  90-Day 
Shape  Square  UV Protected  Yes 
Use  Any 


Rated 5 out of 5 by 4 reviewers.
Rated 5 out of 5 by don't put wood posts in the ground without these I build a lot of pole barns. The weak point of any pole barn is the wood in the ground. Doesn't matter if the wood is treated or not, eventually it rots. I used to pour concrete around the posts, but if any moisture gets between the concrete and the post, it can rot even faster. The post can shrink allowing moisture in the gap between the wood and the concrete. Post Protectors eliminate ALL contact with the soil. Also, there are molded ridges in the product for uplift protection. No more drilling through the posts to insert rebar. I like that there is a protector for just about any square pole. Unfortunately Home Depot doesn't yet carry all of the ones available. If you use laminated poles, they're available. I like to buy from Home Depot for the free delivery when I can. If you want lumber to last, whether you are building a fence or a pole building, start with these. December 10, 2013
Rated 5 out of 5 by Best solution !! Great product......Can be used in any post/fence application for guaranteed DRY posts. Post Protector sleeves and isolated the post from any moisture, chemicals in soil or any seasonal natural run-off.....Making the wooden post completely isolated and dry.............extending the life of the post exponentially in the process. No doubt, I would recommend Post Protector to anyone. September 2, 2014
Rated 5 out of 5 by Great product! I have used this product before for my mailbox post and decided to use it for the bird feeder pole because of the ease of replacing a damaged pole and the extended life it offers to the post. This post protector has a bottom with holes along the vertical edge so water drains out. Without a bottom the wood post would have a shortened life. This product also has rippled edges so water can drain more easily down the sides of the pole and out the drain holes. May 8, 2012
Rated 5 out of 5 by Don't build a pole building without them I use these all the time anymore as a builder of custom barns. Even with pressure treated lumber, rot is inevitable. This virtually eliminates it. I just wish Home Depot carried these protectors in other sizes. Fortunately, other sizes are available direct from the manufacturer. July 17, 2012
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