What Happens If You Leave Your Outdoor Furniture Outside All Winter?
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Time to read 7 min
Every fall, millions of homeowners haul patio furniture into the garage, wrap it in tarps, or rent storage units they did not have room for. Whether you can leave outdoor furniture outside all winter comes down almost entirely to the material.
Table of content
The Answer Depends on What Your Furniture Is Made Of Our Top Picks for WestinTrends What Winter Does to Wood Furniture What Happens to Metal and Iron Furniture Annual maintenance comparison by material type: Wicker and Rattan: The Cold-Weather Casualty Why HDPE Poly Lumber Is Different The Hidden Cost of Seasonal Storage Estimated annual protection costs by material type: The Bottom Line on Winter and Outdoor Furniture Frequently Asked Questions Make the Switch Before Next Winter Recommended Products Related readings
The Answer Depends on What Your Furniture Is Made Of
The short answer is: it depends. Wood warps, metal rusts, natural wicker cracks apart, and budget plastic turns brittle. One material type, HDPE poly lumber, is engineered to stay outside through every season without covers or storage, because it is non-porous.
Porous materials absorb moisture, and when that moisture freezes it expands roughly nine percent in volume, generating internal pressure that fractures fibers, pops joints, and cracks surfaces. In Minneapolis, the average winter delivers 55 to 60 freeze-thaw cycles per season. The material you choose determines whether your fall includes hauling furniture into storage, or simply walking past it.
The WestinTrends Adirondack Chair is built from HDPE poly lumber and is designed to stay on your patio through sleet, snow, and subzero temperatures without any maintenance.
Wood: Absorbs moisture, warps, and cracks through repeated freeze-thaw cycling.
Iron and steel: Develops rust wherever the protective coating chips or scratches.
Natural wicker: Water soaks into woven fibers, freezes, and breaks the weave apart.
Budget plastic: Becomes brittle in extreme cold, prone to cracking under wind or weight.
HDPE poly lumber: Non-porous, dimensionally stable to -58 degrees Fahrenheit, no storage needed.
Our Top Picks for WestinTrends
What Winter Does to Wood Furniture
Wood is porous by nature, and that is its biggest liability in cold climates. Untreated wood can absorb up to 30 percent of its own weight in water during freeze-thaw cycles. When that moisture freezes inside the grain, it expands and forces wood fibers apart from within. It is the repeated cycling between freezing and thawing, rather than any single cold event, that causes warping, cracking, and joint failure.
Experts at This Old House recommend a full annual routine: deep clean, fresh sealant, and indoor storage if possible. Matt Scallions, Design Director at Lane Venture, told Martha Stewart that wood should be covered or moved inside during sub-freezing temperatures, even in the South. Wood furniture protection runs an estimated $200 to $400 per year in supplies and refinishing alone.
What Happens to Metal and Iron Furniture
Metal furniture can look rugged enough to handle anything, which makes the spring rust discovery all the more frustrating. Iron and steel oxidize wherever moisture meets exposed metal, and in a snowy winter that contact is unavoidable. Powder coating provides the primary defense, but temperature cycling creates micro-fractures in the coating over time, and any chip or scratch becomes a rust entry point.
Road salt, common throughout the Midwest and Northeast, accelerates corrosion on metal furniture significantly. Aluminum performs better than iron or steel but still has vulnerabilities: hollow tubes can trap water that freezes and expands inside the joint, forcing connections apart. Lightweight aluminum furniture is also prone to blowing over in winter storms, adding physical impact damage to weather damage.
Annual maintenance comparison by material type:
Material |
Annual Protection Cost |
Typical Lifespan (cold climate) |
Wood |
$200-$400/year |
5-8 years (unprotected) |
Iron / Steel |
$150-$300/year |
10-15 years (with care) |
Natural Wicker |
Must store indoors |
2-5 years (cold climate) |
HDPE Poly Lumber |
$0-$50/year |
20+ years |
Wicker and Rattan: The Cold-Weather Casualty
Natural wicker and rattan may be the most vulnerable materials in a cold winter. The woven construction soaks up water readily, and when that moisture freezes inside individual strands, the expansion cracks the weave apart. Cold and dry winter air make the fibers brittle even before any freezing begins, and strong winds can blow unanchored pieces into walls or fences.
Synthetic wicker made from HDPE resin handles cold weather well, but many products marketed as all-weather wicker use lower-grade PVC resins without adequate UV inhibitors. For natural rattan, the universal recommendation is simple: bring it inside before the first frost.
Signs natural wicker sustained winter damage:
Cracked or snapped strands, especially at corners and stress points on the armrests.
Warped or uneven frame, from moisture working into the structural joints.
Visible mold or mildew, dark spots or a musty smell noticed after the thaw.
Brittleness when pressed, meaning the material will not flex back to its original shape.
Why HDPE Poly Lumber Is Different
HDPE, or high-density polyethylene, solves the core problem that damages every other outdoor furniture material: it does not absorb water. Because the material is non-porous, there is no moisture inside the board to freeze, expand, and crack. The physics of freeze-thaw damage cannot apply to a material with no internal water content.
According to material science references in the Handbook of Polyethylene, HDPE remains intact and non-brittle down to -58 degrees Fahrenheit, far below temperatures reached anywhere in the continental United States.
Real-world reports confirm it. On Reddit's r/Costco forum, one HDPE Adirondack owner wrote: 'We leave them out through harsh winters, all year long, never cover them. They look brand new years later.'
The Hidden Cost of Seasonal Storage
The labor of winterizing non-HDPE furniture is easy to underestimate. A thorough routine for wood or metal patio furniture involves cleaning, drying, applying sealant or wax, moving pieces to storage, covering them, and reversing everything in spring. A conservative estimate for a standard patio set puts the seasonal labor at four to eight hours of work per year.
Space adds another layer of cost. Self-storage units average $75 to $150 per month, adding $375 to $750 over a five-month winter on top of covers and repairs. Industry data estimates $2.8 billion worth of outdoor furniture is damaged by winter weather in the United States each year.
Estimated annual protection costs by material type:
Wood furniture: $200 to $400 per year in sealants, covers, and refinishing.
Metal furniture: $150 to $300 per year in coatings, touch-up paint, and protective covers.
Budget plastic: Low upfront cost, but replacement needed every three to five years in cold climates.
HDPE poly lumber: $0 to $50 per year, covering only basic soap and water for cleaning.
The Bottom Line on Winter and Outdoor Furniture
Wood absorbs moisture and cracks under freeze-thaw cycling. Metal develops rust wherever its coating fails. Natural wicker breaks apart as frozen water expands inside the weave. Budget plastic becomes brittle in extreme cold. HDPE poly lumber experiences none of those failure modes because it is non-porous and stable well below any North American winter temperature.
For homeowners who want furniture that simply stays outside and is ready when they are, poly lumber is the material that makes it possible. The WestinTrends Malibu Bench at is built from the same non-porous HDPE and backed by a 20-year warranty. Explore the full WestinTrends HDPE collection to find the right fit for your space.
Freeze-thaw cycling is the core problem for most materials
HDPE poly lumber sidesteps the problem entirely
Seasonal storage has real hidden costs
Frequently Asked Questions
Can you leave any outdoor furniture outside all winter?
HDPE poly lumber can safely stay outside through all four seasons, including snow and subzero temperatures, because it is non-porous and does not absorb moisture. Wood, natural wicker, iron, steel, and budget plastic will degrade without covers or indoor storage in cold climates.
What does freeze-thaw cycling do to wood furniture?
Wood absorbs moisture into its grain, and when that moisture freezes it expands roughly nine percent in volume, forcing fibers apart from within. Repeated dozens of times per winter season, this internal stress warps boards, loosens joints, and causes surface cracking.
Does HDPE outdoor furniture need to be covered in winter?
No. HDPE is non-porous, so water cannot enter the material and there is nothing to freeze or expand. It is rated stable down to -58 degrees Fahrenheit, far below any recorded winter temperature in the continental United States.
How do you clean HDPE furniture after a winter outdoors?
A garden hose handles most of the work. For stubborn mildew or algae, a soft brush with mild soapy water clears it quickly. No sanding, sealant, or repainting is ever required.
Is HDPE furniture worth the higher upfront cost compared to wood or cheap plastic?
Over a decade, HDPE typically costs less in total when you include protection supplies, replacement cycles, and storage labor. WestinTrends backs its HDPE pieces with a 20-year warranty, reflecting how well the material holds up outdoors year-round.
Make the Switch Before Next Winter
Seasonal furniture storage feels manageable until you tally what it costs in time, space, and money. When the covers, sealants, storage fees, and replacement cycles add up, the case for furniture built to stay outside becomes easy to make. WestinTrends was designed around exactly that premise: outdoor furniture that belongs outdoors, in every season.
WestinTrends Editorial Team
The WestinTrends Editorial Team is a collective of design experts and outdoor enthusiasts with over a decade of experience in the furniture industry. Deeply passionate about sustainable craftsmanship and timeless styling, they share industry insights to help you transform your backyard into your favorite place to gather and unwind.
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