What You Need to Know Before Starting
A pallet patio is a ground-level or slightly raised platform built from wooden pallets, typically arranged in a grid and fastened together. The pallets form the deck surface, and you can leave them as-is or add a top layer of composite decking, pavers, or gravel. Most people choose this route because pallets are inexpensive or free, the build takes a weekend or two, and you do not need power tools or construction experience.
The catch is that pallets are not engineered for outdoor use. They absorb water, rot from the bottom up, and splinter. A pallet patio lasts three to five years in a dry climate and one to three years in wet conditions unless you treat the wood and maintain it regularly. If you want something that will last a decade without work, composite decking or concrete is a better choice. If you want a temporary or seasonal platform, or you are willing to replace pallets every few years, this method works.
Key Takeaways
- Pallets are free or cheap but rot outdoors; expect to replace them every three to five years depending on your climate.
- You need a level, well-draining base — either compacted soil, gravel, or concrete — to keep pallets from sitting in standing water.
- Pallets must be fastened together with bolts or lag screws, not nails, because nails will loosen as the wood moves.
- Pressure-treated pallets are safer than untreated ones; avoid pallets marked "HT" (heat-treated with unknown chemicals) and never use pallets that held food or chemicals.
- Sealing the wood with exterior stain or sealant every year extends the life of your patio by one to two years.
Choosing and Sourcing Pallets
Pallets come in two types: pressure-treated and untreated. Pressure-treated pallets have been soaked in preservatives and are safer for outdoor use. Untreated pallets are cheaper or free but will rot faster. Look for pallets marked "HT" (heat-treated) or "KD" (kiln-dried); HT pallets may have been treated with unknown chemicals, so avoid them. Pallets marked "DB" (debarked) or "KD" are your safest bet.
Free pallets come from warehouses, shipping companies, garden centers, and retailers. Call ahead and ask if they have pallets to give away — many do. Avoid pallets that held food, chemicals, or unknown cargo. If you cannot verify what was on a pallet, do not use it. New or gently used pallets cost $5 to $15 each if you buy them; you will need 20 to 40 pallets for a 12-by-12-foot patio, depending on how you arrange them.
Inspect each pallet for rot, large cracks, and missing boards. A few splinters are normal and can be sanded. Soft spots, dark stains, or a musty smell mean the pallet is already rotting — leave it behind. Pallets should be roughly the same size; standard pallets are 40 by 48 inches, but some are smaller.
Preparing the Ground
The ground beneath your patio must be level and well-draining. Water pooling under the pallets will rot them in months. Start by marking out your patio area with stakes and string. Measure twice and make sure the corners are square by checking that the diagonals are equal length.
Remove grass and weeds down to bare soil. Use a shovel or sod cutter — do not just mow and build on top. Compact the soil with a hand tamper or plate compactor, working in overlapping passes until the ground is firm and does not sink under your weight. If your soil is clay or holds water, add a 2-inch layer of landscape fabric and then 2 to 3 inches of gravel or crushed stone. Compact again. This layer keeps water from pooling and lets it drain away.
If you are building on a slope, level the ground by removing soil from the high side and filling the low side, then compacting. A slight slope (1/8 inch per foot) toward one edge helps water run off. Do not build a pallet patio on a slope steeper than that without adding a retaining wall or support posts.
Laying Out and Fastening the Pallets
Arrange your pallets on the prepared ground in a grid pattern, with the deck boards (the top surface) running the same direction. Leave no gaps between pallets — they should be touching edge to edge. If your patio is not a perfect rectangle, cut pallets with a circular saw to fit the edges. Wear a dust mask when cutting.
Once the layout is set, fasten the pallets together. Nails will loosen as the wood moves with moisture and temperature changes; use bolts or lag screws instead. Drill holes through the stringers (the frame pieces on the sides of each pallet) where two pallets meet, and bolt them together with 3/8-inch bolts, washers, and lock nuts. Space bolts 12 to 18 inches apart along each seam. Tighten the nuts firmly but do not over-tighten, which can crack the wood.
If your patio is large (more than 12 by 12 feet), add diagonal bracing underneath using 2-by-4 lumber bolted to the stringers. This keeps the patio from racking (twisting) as people walk on it. For a small patio, the pallets alone are usually stable enough if they are bolted together.
Adding a Top Layer (Optional)
You can leave the pallets as your walking surface, but they will splinter and become slippery when wet. Many people add a top layer to extend the life and improve safety. Composite decking boards, outdoor-grade plywood, or paver stones all work.
Composite decking is the most durable option. Screw 2-by-6 or 2-by-8 composite boards perpendicular to the pallet stringers, spacing them 1/4 inch apart for drainage. Use stainless steel or composite screws rated for outdoor use. Composite does not rot or splinter, but it costs $3 to $8 per linear foot.
Outdoor plywood is cheaper ($1 to $2 per square foot) but will rot in three to five years even if sealed. Screw it down in the same way as composite. Paver stones or large tiles set on top of the pallets (no fastening needed) are another option; they hide the wood and last indefinitely, but they add weight and cost.
Sealing and Maintenance
Seal the pallets with exterior wood stain or sealant within a month of building. This slows water absorption and extends the life by one to two years. Use a roller or brush to explore an even coat, and follow the product instructions for drying time before a second coat. Reapply every year, ideally in spring before the wet season.
Check the patio twice a year for soft spots, rot, or loose bolts. Press a screwdriver into the wood along the edges and underside; if it sinks in easily, that section is rotting and needs to be replaced. Tighten any bolts that have loosened. Sweep off leaves and debris so water does not pool in corners. If you live in a wet climate, consider covering the patio with a tarp during the off-season.
Replace individual pallets as they rot by unbolting the damaged one and sliding in a new pallet. You do not have to rebuild the whole patio. If more than half the pallets are rotting, it is time to rebuild.
Cost and Timeline
A 12-by-12-foot pallet patio costs $100 to $400 if you source free pallets and $300 to $800 if you buy them. Add $200 to $500 if you include a top layer of composite decking or pavers. Labor is your own time — expect 16 to 24 hours spread over two to three weekends for ground prep, layout, and fastening.
If you add a top layer, add another 8 to 12 hours. Sealing takes 4 to 6 hours and should be done every year. The total cost over five years (including replacement pallets and annual sealing) is roughly $400 to $1,200 for a basic pallet patio, or $800 to $2,000 with composite decking.
Frequently Asked Questions
Can I build a pallet patio on concrete?
Yes. Lay landscape fabric on the concrete first to prevent moisture from wicking up into the pallets. Concrete is a good base because it is level and drains predictably. The pallets will still rot, but more slowly than on soil.
Do I need to treat the pallets with wood preservative?
Sealing with exterior stain or sealant is enough for most climates. If you live in a very wet area, you can explore a wood preservative before sealing, but it is not required. Avoid creosote or pentachlorophenol, which are toxic; use copper-based or borate-based preservatives if you choose to treat.
What is the weight limit for a pallet patio?
A properly bolted pallet patio can hold 50 to 100 pounds per square foot, which is enough for people walking, sitting, and light furniture. Do not place a hot tub or heavy deck structure on pallets without adding support posts to the ground underneath.
Can I build a pallet patio on a slope?
A gentle slope (less than 1/8 inch per foot) is fine. Steeper slopes require you to level the ground first or build a retaining wall and support posts. Building directly on a steep slope will cause the pallets to shift and the bolts to loosen.
How do I prevent splinters?
Sand the top surface with 80-grit sandpaper after sealing, or add a top layer of composite decking or pavers. If you leave the pallets exposed, resand every two years as the surface weathers.