17 Budget-Friendly Ways to Block Fence Gaps Using Repurposed Materials
I refuse to spend hundreds of dollars fixing a simple fence gap. Homeownership is expensive enough as it is.
When you look at that awkward space under the wood panels, it is easy to think you need custom concrete, heavy steel, or an expensive landscaper to fix it. You really don’t. I have blocked massive holes in my own yard using literal junk. It just takes a little creativity and absolutely zero shame about dragging scrap materials out of a dumpster.
Why buy brand new materials to stick in the dirt where they will just get covered in mud anyway? Here are 17 dirt-cheap, highly practical ways to block those gaps using things you probably already have or can find for free.
1. Broken-Down Wood Pallets
Pallet wood is the ultimate free building material. You can find them sitting by the dumpsters behind almost any store. Just break them apart and nail the rustic planks across the bottom of your fence posts.
A quick warning: pulling those spiral pallet nails out is a total nightmare. I ruined a good hammer trying to pry them loose. Don’t pull them. Just grab a reciprocating saw and cut right through the nails. It saves you an hour of sweating.
2. Leftover Paving Bricks
Got a random pile of old bricks sitting behind your shed from a patio project ten years ago? Put them to work. Just dig a shallow trench under the gap and drop them in. You don’t need mortar. They are heavy enough to stay put.
3. Urbanite (Broken Concrete Chunks)
“Urbanite” is just a fancy landscaping word for broken sidewalk trash. Whenever I see a crew tearing up a driveway, I ask if I can haul a few pieces away. They usually say yes. You stack these jagged gray chunks under the fence. It actually looks like a very cool, rustic rock wall. It costs zero dollars and lasts literally forever.
4. Fallen Logs and Branches
Mother Nature’s free gap filler. Next time a storm knocks down a big branch, cut it to the length of your fence panel and just roll it right against the bottom gap. It looks incredibly natural. Just keep dead wood away from the side of your actual house to avoid termite issues.
5. Corrugated Metal Scraps
If you can find old roofing metal on Craigslist or Facebook Marketplace, grab it. Dig a narrow line, drop the metal in, and push the dirt back. Be extremely careful, though. The cut edges of this stuff are like razors. Wear heavy leather gloves.
6. Old Rain Gutters as Planters
People throw away old aluminum gutters all the time. Cut a section, lay it flat on the ground right in front of the gap, and fill it with cheap potting soil. Throw in some mint or wildflower seeds. It completely blocks the hole.
If you love the idea of using green stuff instead of hard junk, I highly recommend checking out my guide on [clever ways to hide fence gaps using plants and planter boxes]. It changes the whole feel of the yard.
7. Composite Decking Scraps
Ask a neighbor who just built a deck for their off-cuts. Composite boards (like Trex) are heavy, totally waterproof, and will never rot when sitting in wet mud. They make the perfect permanent kickboard for the bottom of a fence.
8. Cracked Terracotta Pots
Never throw away a cracked pot. Just flip it upside down. You can overlap a few broken pots along the dirt line to hide weird, uneven holes under your fence. It gives the yard a messy, relaxed garden vibe.
9. Halved PVC Plumbing Pipes
If you have leftover 4-inch sewer pipes, slice them in half lengthwise. Push the open side down into the dirt right under the fence boards. It blocks small pests and costs you nothing.
10. Salvaged Roof Tiles
Clay or concrete roof tiles look awesome stacked up. You can usually buy a stack for a few bucks at a local architectural salvage yard.
11. Chicken Wire + Scrap 2x4s
I honestly hate chicken wire on its own. It bends, it looks cheap, and dogs destroy it. But if you staple it to a heavy piece of scrap 2×4 wood first, and then lay that wood on the ground, it actually holds its shape and works well.
This works fine for basic gaps. But if you have a massive Husky trying to dig his way out to the street, scrap wood won’t hold him. You need to look at these [dog-proof ideas to fill the gap under your fence] instead.
12. Hidden Old Tires
Look, it isn’t the prettiest solution. But if you have a massive, awkward gap in the back corner of your yard where nobody looks, a dirt-filled old tire blocks anything.
13. Rusty Farm Tools or Iron Grates
Old cast iron floor grates or rusty farm implements look amazing leaning against a raw wood fence. It solves your gap problem and counts as “vintage yard art.”
14. Upside-Down Glass Bottles
Bury old wine bottles upside down so just the thick glass bottoms stick out. It sounds crazy, but it makes a really solid border. Just don’t do this if you have kids running barefoot.
15. Painted Old Cabinet Doors
Grab these from a kitchen remodel dump. You have to paint them with heavy exterior paint (I use the cheap “Oops” paint cans from Home Depot) or they will swell and peel in the rain within a month.
16. Stones in Rusted Metal Buckets
Take an old leaky metal pail, drop it in front of the gap, and fill it with yard rocks. It is incredibly heavy, holds zero water, and blocks pests perfectly.
17. Sand-Filled Burlap Sacks
Local coffee roasters often give empty burlap bean sacks away for free. Fill them with dirt or sand and jam them into the gap. Yes, they will completely rot away in a year or two. But it solves your problem today for exactly zero dollars.
FAQ: Using Repurposed Materials on Fences
Will putting scrap wood on the ground attract bugs?
Yes, absolutely. Untreated wood like pallets or old branches sitting in wet dirt will eventually attract termites and pillbugs. Never use untreated scrap wood right next to the exterior walls of your actual house.
Where is the best place to find this free junk?
Craigslist and Facebook Marketplace have “Free Stuff” sections that are goldmines for leftover bricks, urbanite, and dirt. You can also drive around newer neighborhoods on weekends and look for construction dumpsters. (Always ask the crew before taking anything!)
Are repurposed materials safe around pets?
You have to be smart about it. Pallet wood hides sharp nails. Corrugated metal has razor-sharp edges. Glass bottles can break. Always inspect your scraps and sand down rough metal edges before leaving your dog alone in the yard with them.
If you get tired of scavenging for old junk and want a mix of DIY and reliable store-bought options, browse through my ultimate list of [practical & efficient gap filler ideas for fence] to see what fits your yard and your budget best!
