Best picks

Best 12 x 10 Metal Sheds: Top 9 Picks (November 2026)

Updated on · By the Three Porches team

The best 12 x 10 metal sheds include the Aoxun 10 x 12FT Outdoor Storage Shed for most backyards, the Aoxun 10x12 FT Outdoor Storage Shed for a lighter color scheme, and the Benass 10 x 12 FT Outdoor Storage for extra kit in the box.

On this page (9 sections)
  1. The best 12 x 10 metal sheds, ranked
  2. How these 12 x 10 metal sheds compare
  3. How we compared these sheds
  4. What size base does a 12 x 10 metal shed need?
  5. Does a 12 x 10 metal shed need a floor?
  6. Where should you put a 12 x 10 metal shed?
  7. Are metal sheds worth it compared with wood or plastic?
  8. How do you keep a 12 x 10 metal shed in good shape?
  9. The best 12 x 10 metal shed for your yard

The best 12 x 10 metal shed for most backyards is the Aoxun 10 x 12FT Outdoor Storage Shed with double hinged doors, a black galvanized steel building with a sloped roof, built-in vents and a lockable door. It gets the core job right: keeping tools, bikes and garden gear dry and out of the way.

If you want daylight inside, the Quictent is the better pick. If pests getting under the door are your worry, choose the Patiowell.

The rest of this guide sorts nine 12 x 10 metal sheds by what each one is actually good at. You'll find the roof, door and vent details that matter for daily use, plus the base and anchoring jobs every metal shed needs before it stands straight.

Our picks at a glance

  1. 1 Aoxun 10 x 12FT Outdoor Storage Shed
    Best for most backyards

    Aoxun 10 x 12FT Outdoor Storage Shed

    9.7/10 our score

    See it on Amazon
  2. 2 Aoxun 10x12 FT Outdoor Storage Shed
    Best for a lighter color scheme

    Aoxun 10x12 FT Outdoor Storage Shed

    9.6/10 our score

    See it on Amazon
  3. 3 Benass 10 x 12 FT Outdoor Storage
    Best for extra kit in the box

    Benass 10 x 12 FT Outdoor Storage

    9.4/10 our score

    See it on Amazon
  1. 4Quictent Large 10x12 FT Outdoor Storage ShedCheck it
  2. 5BEHOO 10x12 FT Outdoor Storage Shed

    BEHOO 10x12 FT Outdoor Storage Shed

    Best for a simple tool store
    Check it
  3. 6Breezestival 10x12FT Outdoor Storage Shed BlackCheck it
  4. 7Patiowell 10x12 FT Outdoor Storage Shed

    Patiowell 10x12 FT Outdoor Storage Shed

    Best for keeping pests out
    Check it
  5. 8LAUSAINT HOME 10 x 12 FT Outdoor

    LAUSAINT HOME 10 x 12 FT Outdoor

    Best for a bright, tall interior
    Check it
  6. 9AMERLIFE 10x12x7 FT Outdoor Storage ShedCheck it

The best 12 x 10 metal sheds, ranked

Every shed here covers roughly 120 sq ft of floor, so the differences come down to the roof, the door, the vents and how much light gets inside. Start with the top pick unless one of the needs below is yours.

1

Aoxun 10 x 12FT Outdoor Storage Shed: Best for most backyards

Aoxun 10 x 12FT Outdoor Storage Shed, 12 x 10 metal sheds
9.7/10Our score
  • Galvanized steel panels
  • Sloped roof sheds rain
  • Lockable double hinged door
  • Built-in ventilation

A black steel shed with a sloped roof, ventilation and a lockable double door. It covers the basics for tools, bikes and garden gear.

See it on Amazon

Pros

  • 120 sq ft of floor space
  • Sloped roof and vents
  • Lockable double door

Cons

  • Height is modest for tall riders

Aoxun's black shed is the pick for most people because nothing about it is fussy. The sloped roof pushes rain off instead of letting it pool, and the built-in vents let damp air escape so tools don't sit in condensation all winter.

The double hinged door is 28 in wide per leaf and 68 in tall, which is enough to wheel a mower or a bike through without lifting it. A lockable door adds security for anything valuable you keep inside.

Galvanized steel panels with reinforced edges handle rain, wind and sun, and Aoxun says the finish resists dents and rust with little upkeep. Optional internal storage racks, sold separately, let you use the vertical space above the floor for smaller items.

At 192.7 lb it's a two-person build, and the base needs to be flat before the panels go on. The sloped roof also frees up height inside, so the 77 in overall figure leaves usable room under the peak.

The trade-off is height. At 77 in overall it's fine for most people to walk into, but a very tall rider will want more headroom.

For everyday storage, though, it's the safest all-round buy.

Aoxun 10 x 12FT Outdoor Storage ShedCheck it on Amazon
2

Aoxun 10x12 FT Outdoor Storage Shed: Best for a lighter color scheme

Aoxun 10x12 FT Outdoor Storage Shed, 12 x 10 metal sheds
9.6/10Our score
  • Aluminum panels and frame
  • Lockable double doors
  • Sloped roof and vents
  • Light brown finish

The same 10 x 12 footprint as the top pick, in aluminum with a brown finish. Its maker states rust resistance as the headline benefit.

See it on Amazon

Pros

  • Rust-resistant aluminum build
  • Wide double doors
  • Sloped roof and ventilation

Cons

  • Brown finish may not suit every yard

This second Aoxun shed is the same size and layout in a light brown aluminum build. If you want a shed that blends into a wooden fence line rather than making a black statement, this is the one to look at.

The panels are aluminum rather than steel, and Aoxun says the aluminum frame resists rust and dents over long outdoor use. That matters in a wet climate, where cut edges on steel panels are the first place trouble starts.

Read our guide to whether metal sheds rust before you commit either way.

The lockable double doors are tall and wide, so patio cushions, pool gear and garden tools all go in without a fight. Ventilation openings and a sloped roof do the same moisture and rain work as the top pick.

Its base measures a little larger than the black model, at 142.91 x 120.08 in, so give it a slightly bigger pad. Reserved mounting points for internal storage racks help you stack gear upward.

Choose it over the black version when the color matters more to you. The brown finish won't suit every yard.

Aoxun 10x12 FT Outdoor Storage ShedCheck it on Amazon
3

Benass 10 x 12 FT Outdoor Storage: Best for extra kit in the box

Benass 10 x 12 FT Outdoor Storage, 12 x 10 metal sheds
9.4/10Our score
  • Galvanized steel build
  • Three-beam roof design
  • Four-vent airflow system
  • Work light and solar sensor light included

A brown metal shed with a three-beam roof and four vents, sold with a work light, a solar sensor light and a door lock. It ships with gloves and labeled parts.

See it on Amazon

Pros

  • Extras included in the box
  • Three-beam roof design
  • Four vents for airflow

Cons

  • Assembly needs 2 to 4 adults

Benass sells this shed with a box of extras that many buyers end up buying separately: a handheld work light, a solar-powered sensor light, a leaf bag and a door lock. That's the reason to pick it over the plainer sheds here.

The three-beam roof design gives the roof more structure than a simple panel, and a four-vent airflow system keeps the inside from getting stuffy. A sloped roof stops water sitting on top.

It's a galvanized steel build in brown, with lockable doors. Benass recommends 2 to 4 adults for assembly and includes gloves and labeled parts to speed it up.

The kit also lists around 733 cubic feet of storage space.

The published dimensions are worth a second look before you build a pad, since the depth and height figures read oddly against the 10 x 12 label. Measure the base area you have and compare it with the product images.

Skip it if you already own lights and a lock and would rather not pay for a kit you don't need. Choose it if you're starting from nothing and want the shed and the small accessories in one order.

Benass 10 x 12 FT Outdoor StorageCheck it on Amazon
4

Quictent Large 10x12 FT Outdoor Storage Shed: Best for working inside

Quictent Large 10x12 FT Outdoor Storage Shed, 12 x 10 metal sheds
9.2/10Our score
  • 2 clear roof panels and 4 windows
  • 3-tier frame with cross support
  • Sloped roof rated for 8 in of snow
  • 4 airflow vents

Light comes in through two roof panels and four windows, so you can work inside without lamps. The sloped roof is rated for 8 in of snow.

See it on Amazon

Pros

  • Roof panels and windows bring in daylight
  • 8 in snow load rating
  • Pre-drilled holes and numbered parts

Cons

  • Heaviest pick here at 309 lb

Quictent's shed is the one to pick if the shed doubles as a workspace. Two clear roof panels and four windows bring daylight in, so you can sort tools or tinker without running a cable out for a lamp.

The frame is a 3-tier design with three longitudinal beams and a cross support, which Quictent says makes it 20% stronger than a basic frame. The sloped roof has a 3 in overhang and is rated to carry 8 in of snow, so it holds up in a hard winter.

Four vents keep air moving in summer. The dark gray finish is neutral, and pre-drilled holes with numbered parts make assembly quicker for three people.

Quictent also claims the design saves about 20% on setup time.

The trade-off is weight: at 309.3 lb it's the heaviest shed here and needs a careful two or three-person build. It's also the pick to choose when light matters more than a low price.

Quictent Large 10x12 FT Outdoor Storage ShedCheck it on Amazon
5

BEHOO 10x12 FT Outdoor Storage Shed: Best for a simple tool store

BEHOO 10x12 FT Outdoor Storage Shed, 12 x 10 metal sheds
8.9/10Our score
  • Galvanized steel panels
  • Lockable door
  • Sloped roof and vent cuts
  • Ships in 2 boxes

A brown steel shed with one lockable door, a sloped roof and vent openings. It works as a basic tool and gear store.

See it on Amazon

Pros

  • Lockable door
  • Vent cuts for airflow
  • Gloves and video guide included

Cons

  • Smaller usable footprint than most sheds here

BEHOO's brown shed is a straightforward tool store. One lockable door, a sloped roof and ventilation cuts do the basics without extras or complexity.

It's built from galvanized steel with strengthened frames. BEHOO lists lawn mowers, bikes, garden tools, pool supplies and trash cans as the sort of gear it holds, and suggests it can double as a pet shelter or a waste collection spot.

It ships in two boxes with labeled parts, a video guide and gloves. BEHOO advises a flat foundation and two people for the build, and says to check your local HOA policy before you buy.

The honest catch is floor area. Its stated footprint is 116 sq ft against 120 for most of this group, and its overall dimensions are smaller than the label suggests.

A single door also means you load one item at a time rather than swinging both leaves open. It's best for light storage where a compact footprint helps.

BEHOO 10x12 FT Outdoor Storage ShedCheck it on Amazon
6

Breezestival 10x12FT Outdoor Storage Shed Black: Best for windy, exposed yards

Breezestival 10x12FT Outdoor Storage Shed Black, 12 x 10 metal sheds
8.6/10Our score
  • Galvanized steel with waterproof build
  • Rated for winds up to 30 mph
  • Rated for 6 in of snow
  • 4 air vents and padlock-compatible doors

Breezestival rates this black shed for 30 mph winds and 6 in of snow, with wide French doors and four vents. The usable floor area is a little under the stated 10 x 12.

See it on Amazon

Pros

  • Wind and snow load ratings given
  • Wide 45 in French doors
  • Four vents

Cons

  • Floor area is about 110 sq ft

Breezestival gives you numbers to work with: 30 mph wind rating and 6 in snow load, with a reinforced metal roof and walls. That makes it a sensible pick for an exposed yard where the shed takes the weather head-on.

The French doors are 45 in wide and 63 in tall and take a padlock. Four air vents keep the interior from getting clammy, and the sloped roof sheds rain and frees up height inside.

The catch is the size label. Breezestival describes the shed as 9.4 x 11.8 ft and states 110 sq ft of floor area, so it's smaller than a true 12 x 10.

Measure your pad against the actual dimensions before you commit.

At 227 lb it sits between the light Patiowell and the heavy Quictent, so two people can manage the build. Breezestival includes two pairs of gloves and numbered parts.

Its maker also lists optional storage racks sold separately for tools and umbrellas.

Choose it when wind and snow matter most and you can live with slightly less floor. Otherwise the Aoxun gives you more room.

Breezestival 10x12FT Outdoor Storage Shed BlackCheck it on Amazon
7

Patiowell 10x12 FT Outdoor Storage Shed: Best for keeping pests out

Patiowell 10x12 FT Outdoor Storage Shed, 12 x 10 metal sheds
8.4/10Our score
  • Gap-free door reaches the ground
  • 4 roof vents
  • Sloped roof rated to 750 lb
  • Ships in 2 boxes

The lockable door runs all the way to the ground, which helps keep small animals and debris out. Four roof vents keep air moving.

See it on Amazon

Pros

  • Gap-free door design
  • Roof rated to 750 lb
  • Assembly gloves included

Cons

  • Lighter frame than the top picks

Patiowell's gray shed solves one specific problem well. Its lockable door runs all the way to the ground with no gap, so mice, rats and blown-in debris have a much harder time getting inside.

That's the reason to pick it over the others here.

The sloped roof is rated to hold up to 750 lb, and four roof vents keep air moving so moisture doesn't build up. Patiowell says some screws carry a protective cap to slow rust and corrosion.

The door is 44.4 in wide and 63.5 in tall, so wide loads go through easily.

It's a metal build in gray and arrives in two boxes with gloves and a manual. It's lighter than the top picks at 95 lb, which makes it easier to move and assemble but also means less heft in the panels.

Note that the roof load figure and the 200 lb maximum weight capacity are separate ratings.

Pick it for a yard where small animals are the usual problem. Skip it if you want the heavier feel of the Aoxun or Quictent panels.

Patiowell 10x12 FT Outdoor Storage ShedCheck it on Amazon
8

LAUSAINT HOME 10 x 12 FT Outdoor: Best for a bright, tall interior

LAUSAINT HOME 10 x 12 FT Outdoor, 12 x 10 metal sheds
8.2/10Our score
  • Windows and a gable roof
  • Double lockable doors
  • Built-in air vent
  • Powder-coated galvanized steel

A black steel shed with windows, a gable roof and a built-in vent. The gable roof adds headroom at the center and drains rain to the sides.

See it on Amazon

Pros

  • Windows bring in daylight
  • Gable roof adds center height
  • Wide double doors

Cons

  • Gable shape needs careful anchoring

LAUSAINT HOME's black shed has windows and a gable roof, a combination the others here don't offer. The windows let daylight in, and the gable peak adds headroom down the center and sends rain off to the sides.

It's galvanized steel with a powder-coated finish that LAUSAINT says resists rust, corrosion, UV and moisture. The double lockable doors are wide enough for mowers, wheelbarrows and generators.

Its base measures 141.73 x 117.32 in, close to the group average.

A built-in air vent and the gable shape keep the interior drier and better ventilated than a flat-roofed box. Numbered parts and instructions make the build more straightforward.

LAUSAINT lists camping gear and storage boxes among the things it will hold, so it covers seasonal clutter as well as tools.

The gable roof is the trade-off. It looks good and drains well, but a peaked shape catches wind more than a low slope, so anchoring matters more than ever here.

LAUSAINT HOME 10 x 12 FT OutdoorCheck it on Amazon
9

AMERLIFE 10x12x7 FT Outdoor Storage Shed: Best for a workshop corner

AMERLIFE 10x12x7 FT Outdoor Storage Shed, 12 x 10 metal sheds
7.9/10Our score
  • 2 transparent roof panels and 2 windows
  • 4 vents
  • Wide double doors
  • 7 ft peak height

The pick for a full 7 ft of headroom, with light panels and two windows. It suits a yard where you want room to stand and work.

See it on Amazon

Pros

  • 7 ft peak height
  • Roof panels and windows for light
  • Wide 60 in double doors

Cons

  • Maker recommends an 11 x 13 ft foundation

AMERLIFE's shed gives you a full 7 ft of headroom, which is why it suits a workshop corner rather than a plain storage box. If you want to stand up straight while you work at a bench or sort tools, this is the one.

Two transparent roof panels and two side windows bring in daylight, and four vents keep the air moving so dampness doesn't set in. Wide double doors, 60 in across and 67.2 in tall, make moving big items easy.

The base measures 144 x 120 in.

AMERLIFE recommends building an 11 x 13 ft foundation first and says assembly takes about 7 hours with 3 people. The shed arrives in three separate boxes that may turn up at different times.

Anchoring it with expansion bolts on concrete or ground anchors in soil is the maker's advice, and it warns against installing in strong wind or heavy rain.

Choose it if headroom is your main need. Skip it if you just want a dry box for garden gear and don't want to build a bigger pad or wait on extra boxes.

AMERLIFE 10x12x7 FT Outdoor Storage ShedCheck it on Amazon

How these 12 x 10 metal sheds compare

The top picks differ most on light, roof shape and extras, not on floor area. Use this table to line up the features that matter to you before you read the buying advice below.

ProductBest forFloor areaSize (D x W x H)DoorOur score
Aoxun 10 x 12FT Outdoor Storage Shedmost backyards120 sq ft141 x 113 x 77 inDouble hinged, 28 in wide9.7
Aoxun 10x12 FT Outdoor Storage Sheda lighter color scheme120 sq ft142.91 x 120.08 x 76.39 inDouble door with lockable latch9.6
Benass 10 x 12 FT Outdoor Storageextra kit in the box120 sq ft142.52 x 81.49 x 117.71 inLockable doors9.4
Quictent Large 10x12 FT Outdoor Storage Shedworking inside120 sq ft138.11 x 84.25 x 114.49 inWide opening, dark gray finish9.2
BEHOO 10x12 FT Outdoor Storage Sheda simple tool store116 sq ft42.5 x 72 x 72.44 inLockable single door8.9
Breezestival 10x12FT Outdoor Storage Shed Blackwindy, exposed yards110 sq ft142.9 x 120 x 76.4 inFrench doors, 45 in wide8.6
Patiowell 10x12 FT Outdoor Storage Shedkeeping pests out120 sq ft141.7 x 118.1 x 76.8 inLockable, 44.4 in wide8.4
LAUSAINT HOME 10 x 12 FT Outdoora bright, tall interior120 sq ft141.73 x 117.32 x 76.38 inDouble lockable8.2
AMERLIFE 10x12x7 FT Outdoor Storage Sheda workshop corner120 sq ft144 x 120 x 84 inHinged double, 60 in wide7.9

How we compared these sheds

We compared nine 12 x 10 metal sheds on the details that decide how well one works in a real yard. Our score weighs specs, features and buyer feedback against what you're shopping for.

The first check was floor area and real dimensions. Several sheds carry a 12 x 10 label but measure smaller, so the stated depth, width and height mattered more than the name.

That is why the Breezestival's 110 sq ft and the BEHOO's 116 sq ft rank below the sheds that hold a full 120.

Next came the roof. A sloped roof drains rain and adds usable height; a gable roof adds more headroom but catches more wind.

Snow and wind load ratings went into the score where a maker gave them, such as the Quictent's 8 in snow figure and the Breezestival's 30 mph wind rating.

Doors and vents came third. Wide double doors make moving a mower or bike easier, and vents keep moisture from building up inside.

A gap-free, lockable door was a plus for keeping pests out. The Aoxun's 28 in leaves and the AMERLIFE's 60 in opening sit at opposite ends of that scale.

Last, we weighed the extras each shed includes, such as lights, locks and gloves, and how much assembly it asks of you. Heavier panels usually mean a sturdier build and a longer install.

The Benass kit carries the most accessories, while the 95 lb Patiowell is the easiest to handle but the lightest build.

What size base does a 12 x 10 metal shed need?

Plan for a base slightly larger than the shed's footprint, and check the exact depth and width in the specs rather than trusting the 12 x 10 label. Most sheds here measure close to 141 x 118 in at the base.

A concrete pad is the most durable base, because it stays flat and gives anchors something solid to grip. A timber frame on compacted ground is a cheaper route that still works if it's level.

AMERLIFE suggests an 11 x 13 ft foundation for its shed. Allow that kind of margin on all sides so water drains away and you have room to work while assembling the panels.

The Aoxun sheds need the same care, since their bases run to about 141 x 113 in and 142.91 x 120.08 in.

Concrete pad

A poured pad is the longest-lasting option. It won't shift with rain or frost, and bolts hold the shed frame firmly.

It also gives you a floor to stand on, which matters since these sheds ship without one. AMERLIFE recommends expansion bolts for fixing the frame down.

Timber frame on gravel

Build a level frame from treated timber and fill it with compacted gravel. It drains well and costs less than concrete, but check it stays flat over the years.

For soil, AMERLIFE suggests ground anchors instead of bolts. A timber frame also lets air move under the shed, which helps keep the floor dry.

Does a 12 x 10 metal shed need a floor?

No, most 12 x 10 metal sheds ship without a floor, so you supply the base and any floor surface yourself. The panels, frame and roof go on top of whatever you build.

If you want a proper floor, a timber deck or concrete slab works well and gives you a clean surface to store things on. Our guide to the best metal shed with a floor covers the sheds that include one and the floor kits worth adding.

Without a floor, small items can sink into gravel and damp can rise from the ground. A raised base with a membrane under the shed keeps gear drier.

A sloped roof and open vents do the rest, moving moist air out instead of letting it settle on tools and mower decks.

Where should you put a 12 x 10 metal shed?

Put the shed on flat, solid ground in a spot that gets some airflow and isn't sitting in a puddle after rain. Level ground matters more than the view.

Face the doors away from the prevailing wind so rain doesn't drive under them. Leave clearance around the sides for air to move and for you to work on the panels.

A gap-free door like the Patiowell's helps here, but wind-driven rain can still find any seam if the door faces the weather.

Check local rules before you build. BEHOO advises checking your HOA policy, and many areas treat a shed this size as a structure that needs permission or a set distance from the boundary.

Are metal sheds worth it compared with wood or plastic?

Yes, a metal shed is usually worth it for tools and garden gear because it's tough, low-maintenance and resistant to rot. Steel and aluminum panels don't warp or need repainting the way wood does.

The Aoxun's galvanized panels and the Quictent's steel frame are built to shrug off rain and sun for years.

The catch is noise and heat. Metal can get hot in direct sun and noisy in heavy rain, and it dents more easily than wood if something heavy hits a panel.

Vents and roof panels help here, which is why the Quictent and AMERLIFE models with clear panels and four vents do better in summer.

Wood sheds cost more upfront and need more upkeep, while plastic sheds are lighter and cheaper but less sturdy in wind. Our post on whether metal sheds are worth it weighs the pros and cons in more detail.

How do you keep a 12 x 10 metal shed in good shape?

Keep the shed dry and anchored, and it will last for years with very little work. Most problems start with water sitting where it shouldn't.

Clear leaves and debris off the roof so rain drains and snow doesn't pile up. Check the vents stay open so air moves inside and condensation doesn't build.

On models with a 750 lb roof rating like the Patiowell, a clear roof also means the load stays within what the panels are meant to carry.

Touch up scratches and chips on the panels before rust gets a grip. The Patiowell's capped screws are a small help here, but a yearly look over the roof and door edges catches most trouble early.

When you put the shed up, follow the maker's steps so panels don't bend, and our guide to how to assemble a metal shed covers the order and the mistakes to avoid.

The best 12 x 10 metal shed for your yard

For most yards, the Aoxun 10 x 12FT with double hinged doors is the best 12 x 10 metal shed, because its galvanized steel build, sloped roof, vents and lockable door cover everyday storage without extras you don't need.

Pick the Quictent if you want daylight and a snow-rated roof, the Patiowell if pests are the problem, or the Breezestival if your yard takes strong wind. The AMERLIFE suits a workshop corner where you need to stand up.

Whatever you choose, sort the base and anchoring first. A flat, solid pad does more for a metal shed's life than any single feature on the panel.

Our top 3 picks at a glance

  1. 1 Aoxun 10 x 12FT Outdoor Storage Shed
    Best for most backyards

    Aoxun 10 x 12FT Outdoor Storage Shed

    9.7/10 our score

    See it on Amazon
  2. 2 Aoxun 10x12 FT Outdoor Storage Shed
    Best for a lighter color scheme

    Aoxun 10x12 FT Outdoor Storage Shed

    9.6/10 our score

    See it on Amazon
  3. 3 Benass 10 x 12 FT Outdoor Storage
    Best for extra kit in the box

    Benass 10 x 12 FT Outdoor Storage

    9.4/10 our score

    See it on Amazon

Frequently asked questions

How much wind can a 12 x 10 metal shed take?

It depends on the model and how well it is anchored. Breezestival rates its shed for winds up to 30 mph, but every metal shed needs fixing to a solid base with ground anchors or bolts before those figures mean much.

Do metal sheds rust?

Galvanized and powder-coated steel panels resist rust for years, but cut edges, scratches and trapped moisture can start it. Touch up chips when you see them, keep the floor drained and let air move through the vents.

Our guide to metal shed rust explains the details.

Can I put a 12 x 10 metal shed on grass or gravel?

You can, but it will not stay level or secure for long. Metal sheds need a flat, solid surface such as concrete, paving slabs or a timber frame on compacted ground, fixed down with anchors, so the panels do not twist or work loose in wind.