Aluminum fencing made of square profiles — how much does it cost and how to build it?
Aluminum fencing made of square profiles is a solution that combines a modern look, corrosion resistance, and simple installation. For the investor, the three most important issues are usually: how much material needs to be purchased, which cross-sections to choose, and what the actual cost of the entire structure depends on. In practice, a well-designed aluminum fence can be lighter than a steel one, require no regular painting, and offer great flexibility when building panels, wicket gates, and gates. If you are planning a fence made of 40x40 and 80x80 mm profiles, below you will find a practical guide: from choosing the cross-sections, through calculations, to installation.
The AluVeno store offers custom-cut aluminum profiles, including square tubes and rectangular ones, as well as V-SLOT and T-SLOT structural profiles for other technical applications. For fencing, however, properly selected load-bearing and infill profiles are crucial, because they determine the rigidity, durability, and aesthetics of the finished structure.
Why is fencing made of square profiles so popular?
The popularity of aluminum in fencing results from its practical advantages. The material does not rust like classic carbon steel, is lightweight, and at the same time sufficiently rigid for building residential fence panels, modern property fronts, or enclosures around pergolas. In everyday use, this means less maintenance work and a lower risk that after a few seasons paint chips, corrosion spots, or deformations caused by excessive weight will appear.
Square profiles are particularly convenient in design. They make it easy to build a fence panel frame, posts, and horizontal crossbars. They also provide an aesthetic, repetitive visual layout that suits both modern buildings and simple functional projects. An additional advantage is the option to order profiles cut to a specific size, which reduces waste and shortens working time on site.
Which profiles should you choose for aluminum fencing?
The choice of cross-sections should depend on the span of the panels, the fence height, the type of infill, and wind loads. In typical single-family residential projects, the following cross-sections work well:
| Element | Recommended cross-section | Why this choice? |
|---|---|---|
| Fence posts | 80x80 mm | Good rigidity, stability for panels and wicket gates, safe load capacity margin |
| Horizontal crossbars in the panel | 40x40 mm | Sufficient strength while maintaining a lightweight structure |
| Panel frame | 40x40 mm or 50x50 mm | Easy joining, good geometry, aesthetic appearance |
| Vertical infills | 20x20 mm, 25x25 mm or 30x30 mm | Allow you to adjust the visual lightness and opening size |
| Posts by the gate or a heavier wicket gate | 80x80 mm or larger | Greater resistance to moments from leaves and fittings |
If you are building standard panels about 2000 mm long and 1200–1500 mm high, an arrangement of 80x80 mm for posts and 40x40 mm for crossbars is usually the most reasonable choice. 80x80 posts carry panel and wind loads well, while 40x40 horizontal profiles provide sufficient rigidity without excessively increasing the weight. This is especially important where the fence runs over a long section and easier installation matters.
When is it worth increasing the cross-section?
Larger cross-sections are worth considering when the panels are long, visually fuller, or heavily exposed to wind gusts. This also applies to property fronts with a wicket gate and gate, where loads are greater than on the side sections of the fence. If you plan a more substantial infill or small gaps between vertical profiles, it is better not to go below 40x40 mm for horizontal elements and 80x80 mm for posts.
What does the cost of aluminum fencing depend on?
The cost of such fencing is not determined solely by the number of linear meters. It is mainly affected by: the profile cross-section, wall thickness, fence height, post spacing, installation method, and the complexity of the panels. A simple section with two crossbars and vertical infills is priced differently from a modern framed panel with a dense profile layout.
The largest share of the costs usually includes:
- profiles for posts and panel frames,
- vertical or horizontal infill,
- cutting to size and end finishing,
- connectors, screws, end caps, and mounting components,
- anchors or foundations for posts,
- optional powder coating or surface finishing.
If you want to estimate the budget realistically, do not calculate only the perimeter of the plot. Calculate the posts, frames, crossbars, infills, and material reserve for cutoffs separately. In long projects, even small differences in the number of vertical profiles make a big difference in the final order.
How to calculate material for fencing?
The easiest way is to start with one panel module. Let us assume the following example: the panel is 2000 mm wide and 1400 mm high, the posts are 80x80 mm, and the frame and crossbars are 40x40 mm. The infill is made of 20x20 mm profiles set vertically at approximately 90–110 mm center-to-center, depending on the desired effect.
Sample list for one panel
| Element | Quantity | Sample dimension |
|---|---|---|
| Posts | 2 pcs. | 80x80 mm, length depending on height and anchoring method |
| Top crossbar | 1 pc. | 40x40 mm, panel clear opening length |
| Bottom crossbar | 1 pc. | 40x40 mm, panel clear opening length |
| Frame sides or additional verticals | 2 pcs. | 40x40 mm, panel height |
| Vertical infill | depending on spacing | 20x20 mm or 25x25 mm |
How do you calculate the number of vertical profiles? Divide the usable panel width by the assumed center-to-center spacing. For a width of about 1920 mm and spacing of 100 mm, you will get about 19–20 infill pieces. Then multiply this number by the height of a single profile. It is worth adding a reserve for cuts to the total, usually a few percent, especially if you are building several sections of different sizes.
How to build the fence step by step?
1. Marking the fence axis
First, mark the exact building line, corners, and post positions. Check levels and differences in ground height. This is the stage where you decide whether the panels will be installed in one line or in steps.
2. Choosing the foundations and anchoring
80x80 mm posts can be set in a point foundation or fixed to a previously made plinth or ring beam. The anchoring method is selected according to the substrate, fence height, and service loads. For wicket gates and gates, a more rigid and reliable foundation is recommended than for standard panels.
3. Preparing the panels
Panels are assembled as frames made of 40x40 mm profiles with infill from smaller cross-sections — usually 20x20 or 25x25 mm. The frame is best assembled on a flat, even surface: cut the four sides, fasten them at the corners, and then check the diagonals. A diagonal difference above 2–3 mm means the frame is out of square and needs adjustment before installing the infill. Only on such a prepared frame do you mark out and fix the vertical profiles, maintaining constant center-to-center spacing.
4. Installing the posts
The posts are positioned according to the previously marked axis, checking plumb in two planes and the height of the top edge. On longer sections, it is worth stretching a string line between the outer posts and aligning the intermediate ones to it. Until the foundation sets, the posts are stabilized with braces. Each post should be closed at the top with an end cap right away — this prevents water from collecting inside the profile.
5. Installing the panels
Ready-made panels are fixed to the posts using mounting brackets or angle brackets fastened with stainless steel screws. Important: do not connect aluminum directly to galvanized steel without a spacer washer — in moisture, a galvanic cell forms and the connection begins to corrode. Leave a few millimeters of clearance between the panel and the post for thermal expansion; aluminum expands noticeably with the temperature difference between winter and summer.
6. Finishing and adjustment
Finally, check the evenness of the top fence line, adjust the wicket gate and gate, fit end caps on the open ends of the profiles, and complete the decorative elements. The anodized surface only needs to be cleaned with water and a mild detergent — it requires no painting or impregnation.
Summary
A fence made of aluminum square profiles is a structure that can be planned with a spreadsheet: calculate the panels, choose 80x80 cross-sections for posts and 40x40 for frames, determine the infill spacing, and add a few percent reserve. The greatest savings come from ordering profiles cut to size — no on-site cutting, less waste, and fewer dimensional errors.