How much do T18 and T35 trapezoidal steel sheets cost?

T18 and T35 have different rib heights and cross-sections. They may use different quantities of steel to cover the same area. Steel thickness, protective finish and the format ordered also affect the price. A 0.50 mm sheet and a 0.70 mm sheet require separate comparisons.

Gloss polyester, matt polyester and polyurethane coatings may differ in performance and warranty terms. Assess any surcharge against the conditions where the sheets will be used. Check roof geometry, load capacity and joint details whichever finish you choose.

In the catalogue effective from 28 October 2026, a 0.50 mm T18 roofing sheet with a 25 µm polyester coating costs about €8.42 excluding VAT per m² of effective cover, or €10.36 including 23% Polish VAT. Its cover width is 1,100 mm and its overall width is 1,142 mm. The catalogue prices here are converted from PLN at the rate used on 12 November 2026.

The 0.50 mm T35 roofing sheet in the same coating group comes to €9.21 excluding VAT or €11.32 including VAT per m² of effective cover. Its cover width is 1,035 mm. These figures refer to the specified catalogue configurations. A current quote from sandwich-panel.eu depends on the actual order.

For the same T18 with 25 µm polyester, the catalogue gives €10.83 excluding VAT per m² of effective cover at 0.60 mm and €13.23 at 0.70 mm. T35 at 0.70 mm comes to €14.05 excluding VAT. Using the same price list keeps the comparison tied to specific configurations.

On 0.50 mm T18, replacing 25 µm polyester with 35 µm matt polyester raises the price from €8.42 to €9.62 excluding VAT per m² of cover. The 55 µm polyurethane finish comes to €13.23 on the same basis. Before paying the difference, check the performance data, what the warranty covers and its conditions as well as its duration.

Effective area is the area covered after the side lap is formed. Overall sheet area includes the strip under the neighbouring sheet. Ask each supplier to price the same unit and list every sheet. That makes clear whether a lower rate per overall square metre actually buys the required cover for less.

Divide the price per linear metre by the effective cover width in metres. For example, €11 per linear metre at a cover width of 1.10 m gives €10 per m² of effective cover. These round figures illustrate the calculation. Where sheets meet end to end with an overlap, allow for that loss of cover separately.

Add screws, flashings and suitable seals. Depending on the design, layers beneath the covering and preparation of the supports may also be needed. Allow for waste when cutting hips and valleys. Some offcuts cannot be reused elsewhere on the roof.

Look for small-order surcharges, non-standard length charges, delivery and unloading. Long sheets may need lifting equipment. Collection from a yard and delivery to a site with difficult access involve different costs. Check the quote expiry date and the expected lead time.

Second-grade material can suit some applications if you know the defects, lengths and usable area. A scratch, a colour variation and a distorted side lap each have different consequences. Examine the particular defect before deciding whether a sheet can form a weathertight roof.

For a critical part of the building envelope, check the available documentation and the properties required by the design. Savings can disappear if missing lengths must be bought separately or much of a lot is unusable. Calculate the cost per usable area, particularly with mixed lots of profiles, thicknesses or coatings.

State the intended use, profile, steel thickness and coating. Include the required sheet lengths, quantities and delivery location. If the selection is still open, send a drawing of the slope and the support spacing. These details help the supplier price a suitable product.

Compare the total for the complete order and check that both quotations cover the same roof area. A better cutting layout or a lower transport charge can outweigh a small difference per square metre. The total delivered cost for the required layout is the figure that matters to the roofing budget.