Building a corrugated sheet fence: the complete guide

Why are more and more people choosing corrugated sheet for their fence?

Honestly? Not because it's the prettiest type of fence - but because it's the best compromise on the market today. Let's look at what you get for your money.

Affordable

The total material cost of a 50-metre fence is 500,000-600,000 Ft. The same in brick? At least five times that. In decorative wrought iron? 4-7 million. A corrugated sheet fence isn't a "cheap solution", it's a smart one.

20-30 year lifespan

We don't consider the 40 years you read about in manufacturer leaflets to be fully realistic, but a well-installed corrugated sheet fence should easily last 20-30 years - significantly more than you could realistically expect from a wooden fence, for example.

Quick to install yourself

Most of our customers put up the fence themselves because there's nothing magical about it: all you need is a driver, a spirit level and a bit of handiness. The biggest saving is on labour costs.

Maintenance-free

No need to paint it, treat it or replace rotten boards. Once a year you wash it down, check the screws, and that's it. Steel is 100% recyclable, so it's also kind to the environment.

Better security

There's no grip on a smooth metal surface - you can't easily climb it the way you can climb wire mesh or a wooden fence. And if it's made of 0.5 mm sheet or thicker, you can't kick it in or tear through it either. A corrugated sheet fence isn't just durable - it also protects.

How does corrugated sheet compare to other fence types?

Before you dive in, it's worth comparing the options. Look at prices, lifespan and what you can do yourself, because labour is often the biggest single cost.

Corrugated sheet is the cheapest solution that gives full privacy and is also doable as a DIY job. For price vs privacy there's no competitor on the Hungarian market. Concrete panel and stone are stronger but cost two to three times as much and need a tradesperson. A wooden fence lasts 10-25 years and needs constant painting - with corrugated sheet you don't even have to buy paint for a good 15-20 years.

Which profile should you choose for a fence?

The "T" number refers to the rib depth in millimetres. The deeper the rib, the stiffer the sheet - but also the more expensive. Three profiles come into consideration for fencing, but we recommend T18 in 90% of cases.

T8 (8 mm rib height) - cheap but weak

The cheapest sheet, with an almost flat appearance. We don't recommend it for fencing. In a sheltered yard, between neighbouring plots, it might just about work - but the moment it catches any wind, it'll start rippling. We had a customer who tried to save a few thousand forints this way, and then had to replace the fence after the first storm.

T14 (14 mm rib height) - a bit better, but still not enough

Much stiffer than T8, but we still wouldn't call it ideal. It vibrates in the wind, and since T18 is barely more expensive (in fact our T18 is cheaper than most retailers' T14) - we don't recommend it separately. Whoever buys T14 saves a few hundred forints per square metre and in return gets a weaker fence. Not worth it.

T18 (18 mm rib height) - this is what we recommend

This is the profile most of our customers order for fencing - and with good reason. Stiff enough not to vibrate in the wind, but not so deep-ribbed that it looks industrial. Strong, durable, but still easy to work with - no special tools or particular extra expertise needed.

How thick a sheet should you pick?

This is the second most important decision after the profile. We recommend 0.5 mm as the minimum thickness for fencing - most people in the trade agree. 0.4 mm will just about do for a fence, 0.6 mm is worth it on a windy site, but for most everyday situations 0.5 mm is the right call.

Each extra tenth of a millimetre adds roughly 15-20% to the price, but the stiffness grows much more than that. The difference between 0.5 and 0.4 is huge in the hand - 0.5 feels stable, 0.4 feels "papery".

Don't fall for "super cheap" sheets. Suspiciously cheap corrugated sheets pop up online all the time. Either the thickness isn't stated, or it's hidden somewhere in the small print: typically 0.35 mm or even less. That's paper-thin, has no rigidity, and bends in a stronger gust. We've seen enough of it. If the price looks too good to be true, ask for the thickness - and if you don't get a straight answer, don't order.

Posts and foundation - this is where everything is decided

We can't say this often enough: a corrugated sheet fence is a continuous steel wall that catches the wind like a sail. That's a 5-10 times greater load than what hits a wire mesh fence. If the posts are weak or the foundation shallow, the fence will tip over in the first serious gale. Not "warp" - topple.

What size post do you need?

Posts should be hot-dip galvanised, and if you can, powder-coated in the same colour as the fence. And always put on a post cap - rainwater running into an open tube rusts the post from the inside, and in winter it can split it with frost.

It's important to know that driven posts and ground screws are unfortunately not enough for a corrugated sheet fence. They're proven solutions for wire mesh, but the solid surface of corrugated sheet picks up far higher wind loads - and over time the wind loosens driven posts and ground screws from the ground. The safe solution is always a post set in a concrete foundation.

How far apart should the posts be?

2.0-2.5 metres is the generally recommended post spacing. You can go wider, but that needs a thicker sheet and a stronger post - in most cases 2.5 metres is the safe upper limit.

Why does the right post spacing matter?

Fences that rattle and ripple in the wind are almost always down to too wide a post spacing. On windy sites - a hillside, open ground - it's worth tightening the posts to 1.5-2.0 metres. That's a smaller investment than fixing the fence afterwards.

Concrete foundations

The concrete foundation has to reach below the frost line - the depth to which the ground freezes in winter. If the concrete is shallower than that, frozen soil lifts the post in winter and drops it again in spring, and in a few years the fence "drifts". On the Hungarian Great Plain the frost line is 60-80 cm, in hilly areas and the north of the country at least 80 cm, and up to 100 cm in the mountains.

The rule of thumb is simple: one-third of the total post length goes into the ground. So for a 1.8 m high fence you need roughly a 2.5 m post, of which 70-80 cm is concreted in. This isn't overkill - with corrugated sheet, where wind load hits the entire surface, this is what it takes to keep the post from tipping over.

1. Digging the hole

The hole should be at least 30×30 cm in cross section, and deep enough to reach below the frost line - so typically 80-100 cm deep. At gate posts and corners it's worth widening the cross section to 40×40 cm, because greater forces act on these points - opening the gate, and corners catch the wind from two directions. If the soil is clay or stony, digging by hand is hard work: half an hour per post with an auger, potentially half a day with a spade. It's worth considering renting a motorised auger - for a larger fence it pays back quickly.

2. Gravel bed

Spread 10 cm of crushed stone at the bottom of the hole (8-16 mm or 16-32 mm fraction). This gravel layer does two important things: it drains water away from the base of the post, and stops the post "sinking" in wet soil. Without drainage, water pooling around the concrete foot freezes in winter and pushes the whole post up from below.

3. Setting the post

This is the step that decides whether the finished fence stands straight or looks "drunk". Use a spirit level on two adjacent sides - the front and the side of the post - to check it's vertical. If the post is off by even one degree, you already get a deviation measured in centimetres at the top of the fence, and from there on the sheets won't sit straight either.

Before pouring concrete, secure the post with temporary braces (wooden boards, angled props), because the weight of the concrete going in can easily shift the post, and once it sets you can no longer correct it. Two boards from two directions - that's it, and yet many people skip it, then try to "drag back" the leaning post afterwards.

4. Concreting

Use C16-C20 grade concrete - available at any builders' merchant as dry concrete (in bags), or mix it yourself (1 part cement, 2 parts sand, 3 parts gravel). You'll need around 2-3 bags (25 kg) per post of bagged concrete, depending on the hole size. Shape the top of the concrete into a cone or dome above ground level - that way rainwater runs off and doesn't stand at the base of the post.

Curing time is a minimum of 48 hours, but the ideal is 3 full days (72 hours). That means don't fit anything during that time - no rails, no sheets. We know it's tempting to crack on the next day, but in 48 hours concrete only reaches about 60% of its final strength, and fitting the sheet puts serious shear force on the posts. Whoever fits too early risks the post shifting in the still-soft concrete.

Don't concrete below 5°C. In the cold, the chemical reaction in cement (hydration) slows dramatically, and stops below freezing. The result: the concrete never reaches the required strength, stays crumbly and weak. A foundation like that fails in the first serious gale. If you have to build a fence in winter, wait for days above 5°C - or use frost-protected concrete, but even that only shifts the limit a few degrees lower. In spring and autumn, watch the night-time temperature too: if it's 10°C by day but freezes at night, fresh concrete is still vulnerable.

For those who want something more serious: strip foundation with shuttering blocks

Many people don't just concrete each post individually but build a continuous strip foundation. The tried-and-tested recipe: 10 cm reinforced concrete base, a row of 20 cm shuttering blocks on top reinforced and filled with concrete, with the posts set in afterwards.

It's more work and more material, but it's worth it: the fence is more stable, and neither the neighbour's irrigation water, nor rainwater, nor stray animals can get through underneath. Whoever puts in the extra work never regrets it later.

Combined solutions

The most popular "upmarket" fence is the combination of brick or stone posts with corrugated sheet infill. Prettier than a pure metal fence, and the posts are much stronger - but the build is slower and more expensive, because you also need a bricklayer.

Plinth - the most often neglected part of the fence

The weakest point of a corrugated sheet fence is the bottom: this is where it catches most of the moisture - splashing rainwater, snowmelt, and moisture drawn up from the soil. If the sheet goes right down to the ground - or worse, sits in the ground - the bottom 10-15 cm starts to corrode within 5-8 years. This is the most common fence problem we see, and it's almost always preventable.

The solution is a 20-30 cm high concrete plinth that the metal fence panel sits on. The plinth does two things at once: it lifts the sheet away from ground moisture, and closes off the bottom of the fence so neither water nor stray animals can get through. If you don't want to build a plinth, at least leave a 5-10 cm gap between the bottom of the sheet and the ground - that way the sheet isn't sitting in wet soil and air circulates freely underneath. It doesn't protect as well as a plinth, but it's much better than the sheet sitting directly on the ground.

Horizontal rails - what the sheet is screwed to

Between the posts run horizontal steel rails - the corrugated sheet is screwed to these. The rails are galvanised steel box sections, and their size depends on post spacing: a 2.5 m span needs 40×40×2 mm section, and up to 2.0 m a 30×30×2 mm is enough. The smaller section is cheaper, but only takes the sheet's weight and the wind load over a shorter distance.

How many rails do you need? Up to 1.5 m fence height, two rails - one top, one bottom - hold the sheet. Above that, three rails are needed: top, bottom and middle. In fact above 1.5 m it's always worth fitting three - the middle rail is what stops the sheet deflecting or "pumping" in the wind.

Placement: the top rail 5-10 cm below the top of the fence, the bottom one 10-20 cm above the ground, and the middle one roughly halfway between. Most installers weld the rails to the posts, but there are screw-on brackets that let you do the same without a welder.

Many people forget this: the entire steel frame - both posts and rails - must be painted or treated with a rust-inhibiting primer before you fit the sheets. Once the sheet is on, you can't get to the surfaces behind it. Untreated steel quietly rusts under the cover of the sheet, and by the time you notice - typically when you replace the sheet - years have passed and part of the frame is beyond saving.

Wind is the biggest enemy

We're not trying to scare you, but the numbers speak for themselves. On a 2 m high solid fence with 2.5 m post spacing, in normal Central European winds, a single post can carry up to 600-800 kg of force. That's not a storm - that's just strong wind. In a storm it's more, of course.

That's why under-sized fences fall over. Not because corrugated sheet is bad material - but because the foundation and posts couldn't handle the force that a 2-metre "sail" transmits.

How do you reduce wind load?

The answer is either to place the posts closer together (2.0 m or less), or to use a thicker post, deeper foundation and diagonal bracing at the corners. If you don't mind how it looks, small ventilation gaps between panels also help a lot - these openings can cut wind load by up to half.

What will you need?

It's worth getting everything in advance, because running off to the DIY store next to a half-built fence isn't the most fun programme, and it eats up a lot of time.

Tools

• Cordless driver with a magnetic 8 mm hex bit holder
• Spirit level - min. 600 mm, but 1,200 mm is much more comfortable
• Auger or spade - for the post holes
• Tape measure - a 5 m and a 25+ m for the fence line
• Builder's line and pegs - for setting out
• Tin snips - for small adjustments
• Welder or screw-on brackets to fix the rails

Protective equipment

Safety is no joke: the edges of corrugated sheet are razor-sharp. Without cut-resistant gloves injury is practically guaranteed - we hear that back from time to time from people working with sheet for the first time. Safety glasses, steel-toecap boots and a dust mask when cutting are also mandatory.

Screws - don't skimp here

Fix the sheets to the rails with 4.8 × 19 mm hex-head self-drilling screws with an EPDM rubber washer.

The screws should be the same RAL colour as the sheet. Silver screws on a dark sheet look odd to say the least. This isn't about money - we can supply colour-matched screws with every corrugated sheet for the same price.

Plan for 7-8 screws per square metre, every 2nd or 3rd trough, about every 30 cm along the rails. In our experience this also helps a great deal in preventing wind-noise problems.

How to fit the sheet - step by step

1. Setting out

Put wooden pegs at the corner and end points and stretch a builder's line between them at the planned fence-top height. Mark the post positions every 2.0-2.5 metres.

If the run is longer than 10 metres, check the line is level with a spirit level or laser - you can't judge it by eye. We've met people who pulled the line "by eye" and ended up with a 5 cm difference in height at the end of the run. Sadly, that fence had to be redone.

2. Setting the posts

Always set the corner and end posts first - these are the reference points. Gravel at the bottom, post in, spirit level on two adjacent sides, temporary braces, concrete. Then stretch a line between them, and align the intermediate posts to that.

Don't move on to the rails until the concrete has set for at least 48 hours. Ideally 3 days. We know it's hard to wait - but from experience, it always starts the same way: someone concretes on Saturday morning, wants to fit the rails in the afternoon because "it's already good and hard", then the first gust tips the posts. Between waiting two days and starting the whole project over, there's no question which is the better deal.

3. Horizontal rails

Whether you weld or screw them, the rails must be perfectly level. If you weld, treat every weld point with zinc spray - bare metal is an entry point for corrosion. An untreated weld point can start rusting within a few months, and the problem spreads from there.

Paint the entire steel frame before you put the sheets on. You won't be able to reach it afterwards. Many people make this mistake - they fit the sheet, then realise the rail is unpainted, but can't get a brush in behind the sheet any more.

4. Fitting the sheets

Start from one corner and work in one direction. Take care to set the first sheet vertical - all the others will line up to it. The good side should face outwards.

Screw from the top down

If you start from the bottom, the sheet can distort. Put a screw in every 2nd or 3rd trough, along the rails.

The screw should go in at right angles

The correct torque is when the EPDM washer compresses slightly and just barely bulges out. If you over-tighten, you deform the sheet and lose the seal. If you under-tighten, water can get in underneath. It's a matter of feel, but after 3-4 screws you'll have the knack.

Leave a gap for thermal expansion

A ~5 mm gap between neighbouring sheets at the posts. In summer the metal expands - if there's no room, it bulges. The overlap is one rib, and that's already included in the "effective cover width".

Check every 2-3 sheets

Use a spirit level to check vertical alignment. Small deviations add up, and by the end of the run it'll look ugly. Brush off metal swarf from the surface immediately - steel particles on a painted sheet cause rust spots that can't be removed. This is not an exaggeration: a single chip from a cut, left overnight in the rain, is already rusted on by the next morning.

How to cut the sheet (forget the angle grinder)

Never use an angle grinder to cut coated corrugated sheet. That's a basic rule.

The heat from the grinder burns off the zinc and paint layer along the cut, and the sparks embed themselves in the surface leaving rust spots that can't be removed. The manufacturer's warranty also goes out the window. Many sheets specifically come with a "no angle grinder" symbol, and despite that, we see photos of grinder-cut fences every week.

Our experience is that the angle grinder causes the most complaints with fencing. Not sheet quality, not coating - it's that the cuts are burnt to pieces. Then comes the complaint: "the sheet is rusting, and it's barely six months old". Sadly it's always the same story.

The right tools: a nibbler is best - cuts without heat, follows the profile, leaves the coating intact. Electric shears for straight cuts, hand tin snips for small adjustments. After every cut, treat the exposed edge straight away with zinc spray or touch-up paint. Those few minutes save the sheet for years.

Corners, gates and finishing

Corners

A corner point needs a reinforced post. Close off one run here, and start the perpendicular run from the same post. Cover the joint with an L-shaped corner element, or bend the sheet around the corner. Both look good - pick whichever is easier for you.

Gates

Gate posts should be at least 80×80 mm - deeper and set in more concrete, because they carry 3-4 times the load of intermediate posts. Don't save money at this point: a weak gate post can work loose within half a year, and if the whole gate frame drops, replacing the post is a bigger job than the original installation was.

Build the gate frame from welded box section (40×20 or 40×40 mm) - the sheet screws onto it the same way. The hinges should be rated for the weight of the gate - here too the cheapest hinge is the most expensive decision in the long run.

How much work does it need afterwards?

Not much. But the little maintenance it does need, you should actually do - otherwise the fence will last 10 years instead of 20. The difference is a total of 1-2 hours of work per year.

The one rule to remember

Treat every scratch immediately. With zinc spray or colour-matched touch-up paint. Rust starts at these points and spreads under the coating - if you leave it, within a few months it can no longer be fixed simply.

We had a customer who picked up a few scratches during installation and didn't bother with them, "I'll do it in the spring". By spring there were 10 cm rust patches along the scratches. The repair ended up costing as much as the zinc spray would have - except that would have been a few hundred forints, and the repair ran into tens of thousands.

Cleaning

Warm soapy water, soft brush, top to bottom, rinse off. A garden hose is enough in most cases. A pressure washer is OK too, but keep it at a distance and don't turn the pressure up too high - the concentrated jet can damage the paint layer. Scouring agents, steel wool and strong acids are forbidden - they strip off the coating. Once every six months is enough, more often next to a salted road.

Screws

It's worth going round them every quarter. Thermal expansion and wind vibration gradually loosen them. Check the EPDM washers too - if they're cracked, replace them. A check like this takes 15 minutes, but if you don't do it, sooner or later one of the sheets works loose and starts rattling in the wind. And a rattling sheet isn't just noisy - it also wears out the fixing point.

Climbing plants and the fence

Many people would like to grow ivy or a climbing vine on a corrugated sheet fence - it would look nicer, no argument. But don't put it directly on the sheet. Plants hold moisture, some species (e.g. ivy) can produce oxalic acid that attacks the coating, and the shoots scratch the surface. A barely noticeable process like this ends with the coating ruined within a few years - and you won't even see it behind the plant until you remove it.

If you want to green up the fence, build a separate trellis or wire mesh 10-20 cm away and grow the plant on that. The fence can breathe, and the coating stays intact.

Seasonal tasks

Spring

Walk the length of the fence, tighten the screws, touch up paint damage after the winter. This is the annual "big clean" - really half an hour of work, but that half hour decides how the fence comes out of the next winter.

Summer

Check the south-facing side for fading. Wipe bird droppings off straight away - they're acidic and damage the coating. If you leave them, they eat into the paint within a few weeks.

Autumn

Sweep leaves away from the base of the fence - they hold moisture and can cause corrosion on the bottom edge. Tighten screws before the winter storms.

Winter

A quick check once a month. If there's a lot of snow on it, knock it off carefully. Save the more serious work for spring.

With a matt polyester coating you don't have to repaint for 15 years. With PVDF, 25+ years. If the coating is damaged on more than 10% of the surface, it's worth thinking about a complete repaint - but under normal use, that's a long way off.

9 problems we see - and how to solve them

How much does a corrugated sheet fence cost?

In concrete terms, in forints. The total material cost of a standard 1.8 m high fence - sheets, posts, rails, concrete, screws, accessories - is 12,000-18,000 Ft per running metre. The exact figure depends on profile, thickness and coating.

What makes up this price? (Itemised breakdown)

Per running metre cost of a 1.8 m high, T8 matt polyester fence, itemised:

These are 2025/2026 guide prices. With T18, thicker sheet or a premium coating (PVDF, wood-grain) they're higher. The cheapest option (single-sided RAL 8017, 0.4 mm) starts from around 9,600 Ft/m net, two-sided coloured matt around 11,700 Ft/m, two-sided wood-grain around 14,500 Ft/m net.

By fence length

If a contractor does it, roughly double the material cost. If you do it yourself with a helper, 2-3 weekends is the whole thing (the concrete curing takes most of the time). The sheet fitting itself is half a day.

How many sheets do you need?

Simple arithmetic: total fence length divided by the effective cover width of the sheet, rounded up. Example: 50 metres of fence with T18 sheet (1.10 m cover): 50 ÷ 1.10 = 45.45, so 46 boards. Order +2-3 boards extra as spares and for cutting waste. If there's a corner on the plot, add +1 board per corner. Subtract the gate openings.

Do you need a permit?

Hungary

Under the old OTÉK (Government Decree 253/1997, § 44) you could build a solid fence up to 2.50 m high without a building permit - combined with a retaining wall, up to 3.00 m.

A new regulation has been in force since January 2025. The TEKA (Government Decree 280/2024, § 61) has reduced the maximum height for solid fences to 2.00 metres - half a metre lower than the old OTÉK limit. Which one applies to you depends on whether your municipality's local building code (HÉSZ) refers to the old OTÉK or the new TEKA. The planning department at the council can tell you.

But - and this is important - many municipal HÉSZs limit the street-facing fence to 1.8 m with 50% open area. That means you can't put a solid metal fence facing the street. On the side and rear plot boundaries there's usually no such restriction. There are municipalities (e.g. Göd) where the HÉSZ specifically bans corrugated sheet fences on the street front.

The fence has to stand within your own plot boundary, and the gate cannot open outwards onto public ground. A building permit isn't needed, but a townscape notification may be - especially for street-facing fences, in listed-building surroundings or on a plot bordering public ground.

Germany

The permit-free height varies by region, between 1.25 and 2.0 m - in most places the limit is 1.80 m. A setback of 0.50 m from the plot boundary is typically required. At junctions nothing taller than 0.80 m may be built within the sight triangle.

Before you order anything, go to the council and ask about the local rules. Five minutes, and you avoid having to tear down the fence afterwards. We didn't invent this - sadly there've been cases.