Planning and costs
How much do T18 and T35 trapezoidal steel sheets cost?
In brief
The price of trapezoidal sheet depends on the profile, steel thickness, coating and unit of settlement. Compare T18 and T35 at the same thickness and per square metre of coverage. Accessories and delivery must be added to the price of a sheet. The examples below come from public price lists checked on 1 November 2026. They are catalogue prices for the material, not a current sales offer from IZOProfil. In the checked price list, trapezoidal sheet T18 made of 0.50 mm sheet, with a polyester coating, costs €8.41 net and €10.35 gross per m² of coverage. The T35 variant of the same thickness and type of coating has a price of €9.04 net and €11.12 gross per m² of coverage.
What are the example prices for T18 and T35?
In the reviewed price list, trapezoidal sheet T18 made of 0.50 mm sheet, with a polyester coating, costs €8.41 net and €10.35 gross per m² of coverage. The T35 variant with the same thickness and type of coating is priced at €9.04 net and €11.12 gross per m² of coverage. The document states that it is valid from 13 April 2026. The final order price requires confirmation.
Another price list, valid from 28 October 2026, gives for a roof trapezoidal profile with a height of 18 mm and a pitch of 157 mm the amount of €8.41 net and €10.34 gross per m² of coverage. This applies to 0.50 mm sheet in 25 µm polyester. Similar prices do not mean identical sheets. Before purchase, compare the cross-section, width and installation requirements.
Why can the price per metre look different?
In the first T18 example, one square metre of sheet measured across its full width costs €8.09 excluding VAT or €9.95 including VAT. The price per square metre of roof covered is higher because the side lap uses part of the sheet width. Both prices describe the same material. Compare quotations using the same area basis.
When ordering by linear metres, the sheet width is important. One metre of length does not automatically cover one square metre. The number of sheets must be calculated for the dimensions of the roof slope, not merely by dividing its area by the area of one element. The last strip and cut-offs may leave material that you cannot use elsewhere.
How do thickness and coating change the cost?
Greater thickness means more steel and may improve the load-bearing parameters of a specific profile. However, you should not pay more without checking the design, nor save by accidentally reducing the thickness. The supports and loads are selected for the actual product. T35 made of very thin sheet is not a simple equivalent of every thicker T18.
Coatings differ in composition, thickness and scope of protection. A matt appearance alone does not determine durability. Compare resistance to corrosion and UV radiation, as well as the warranty conditions. Industrial, coastal or agricultural environments may impose particular requirements. In such a situation, the cost of a suitable coating is often justified by the service conditions.
Is it worth paying extra for the anti-condensation layer?
In the price list of 28 October 2026, the described 18 mm trapezoidal profile with fleece costs €10.09 net and €12.41 gross per m² of coverage. Without fleece it is €8.41 net and €10.34 gross. The difference relates to the same variant of sheet and coating. It is not a universal surcharge applicable with every supplier.
The surcharge makes sense when the layer meets the building’s need. In an uninsulated canopy or garage, it can temporarily hold back condensation. However, it requires conditions for drying out and correctly formed edges. It will not heat the structure or replace the entire roof insulation. Before purchase, the source of moisture must be identified, rather than treating the fleece as a solution to every leak.
How do you calculate the requirement for your roof slope?
Assume, solely for the purposes of the calculation, that the cutting plan indicates the purchase of 100 m² of covering. At the catalogue amount of €10.34 gross, the material would come to €1034.00 gross. If the cutting plan yields a larger quantity, you calculate the actual order. This is still not a quote for a finished roof. Flashings, fasteners, sealants and transport must be added.
Pay attention to the sheet length and the possibility of unloading. Very long elements can limit the number of joints, but they require a suitable vehicle and safe handling. Ask about the delivery cost for a specific location and the unloading arrangements. This item can change the result of comparing two offers with a similar price per metre of sheet.
What should a price enquiry include?
Provide the application, profile, thickness, type of coating and colour. Include the number of sheets with lengths or a drawing of the roof slopes for calculation. Indicate whether fleece is required and describe the conditions of use. Ask for the covering width, the price validity date and the expected delivery date. Such data allow comparable responses to be obtained.
Before accepting the offer, also check the material grade and documents. For an outlet batch, you need to know what defects it has and whether they will affect the application. A low price for a sheet with a damaged interlock may not bring savings on the roof. The most useful quote describes the goods precisely and separates the cost of the material from the cost of its use on site.
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