Budgeting for metal roof tiles: compare coverage and the complete roof

First establish the pricing unit: total sheet area, effective covering area or one module. Laps consume material without covering additional roof. Divide a piece price by its effective coverage.

Compare equivalent steel thickness, coating and tax basis. A net amount is not a gross equivalent. Tax treatment for an installation service must be established separately in that quotation.

The Balex Metal list valid from 28 October 2026 quoted SPEKTRUM 0.50 mm with PE25. Converted for illustration, this is EUR 8.96 net / 11.03 gross per effective m². Conversion: NBP table 219/A/NBP/2026, 10 November 2026, EUR 1 = PLN 4.3895.

Using the same exchange rate, PE35M becomes EUR 10.18 net / 12.52 gross, and PUR55 EUR 13.57 / 16.69 per effective m². The source uses 23% VAT and independently rounded columns. These are historical material examples, excluding the complete roof.

For modular PANORAMA, the same list and conversion give net / gross prices per effective m²: PE25 EUR 9.99 / 12.29, PE35M EUR 11.13 / 13.69 and PUR55 EUR 14.56 / 17.91. These are not the adjacent per-sheet figures.

A higher modular rate in this example does not determine the whole project cost. Dormers and short slopes affect cutting, handling and labour. Compare both layouts on the same roof drawing.

Derive the order quantity from measured slopes and the sheet layout. A building footprint is not a roof measurement. Allowance should reflect actual cuts and laps, not a universal percentage.

Assuming 216 m², the original gross calculation converts to EUR 2,654.79 at the stated NBP rate. The total is converted before rounding; multiplying the rounded EUR unit price gives a small difference. The 216 m² is an example assumption, not a prescribed allowance.

List ridges, flashings, fixings, ventilation, underlay, battens and gutters separately. Refurbishment may add removal, waste handling and substrate repairs. Each item needs a quantity and defined work scope.

Check delivery, unloading, lifting and scaffolding as well. Bringing long sheets to the property does not include getting them onto the roof. Specify who supplies equipment, labour and safe access.

Reduce losses from inaccurate measurements and unplanned cuts first. Then compare coatings suited to the exposure. A more expensive finish should provide a useful property, not merely a more impressive name.

Omitting flashings, fixings or a specified thickness changes the technical solution rather than creating an equivalent saving. For a substantially cheaper quotation, compare exclusions against the competing scope.

Provide a plan, lengths, pitch, location, profile and coating. Request a sheet schedule, accessory list, delivery scope and validity date. One shared specification reveals whether quotations describe the same roof.

Replace every illustrative figure with a current quotation before ordering, and retain the schedule used for your decision. Compare a complete, defined scope rather than one square-metre price detached from its terms.