Costs of new construction
How to compare the prices of wall and roof sandwich panels in 2026?
Wall and roof panels must be priced as different parts of a single building envelope. They differ in geometry, accessories and operating conditions, so a single price per square metre for the whole building can be misleading. The comparison method below organises quantities and scope, and the example amounts show the mechanics of the calculation without pretending to be a current market offer. For the wall, state the vertical or horizontal layout, cover width, thickness, facings and openings. For the roof, add the pitch, lengths, transverse joints and rooflights. In both parts, specify the internal conditions and the project requirements. Such a description allows prices to be compared without mixing different products.
Build two specifications in one schedule
Do not treat identical thickness as proof that panels are equivalent. A roof has its own profiling and fixing geometry. Wall panels may also differ in their interlock and the visibility of fixings. The quote should cover the variant that will actually be installed, not the cheapest item from a broad group.
Example rates are for calculation purposes
The table uses indicative net prices solely to show the calculations. The variants do not constitute an offer or information on average prices in 2026. Both solutions must first be checked against the building’s requirements; they cannot be selected solely by comparing totals.
| Item | Quantity | Assumed rate (EUR/m²) | Amount (EUR) |
|---|---|---|---|
| Walls, variant A | 320 m² | €29.16 | €9,331.20 |
| Roof, variant A | 410 m² | €34.25 | €14,042.50 |
| Walls, variant B | 320 m² | €35.41 | €11,331.20 |
| Roof, variant B | 410 m² | €40.27 | €16,510.70 |
The panels alone come to €23,373.70 in variant A and €27,841.90 in variant B. The difference of €4,468.20 is the price of the adopted specification change, not an automatic justification for choosing the cheaper option.
Which extras should be calculated for each building element?
For walls, include base profiles, corners, reveals and roof-edge terminations. For the roof slope, allow for the ridge, eaves, side flashings, drainage and opening details. Add the appropriate tapes, seals and fixings. Settlement may be per piece, linear metre, roll or pack.
Do not add a single percentage figure without checking the geometry. A small building with many openings may have a larger share of flashings than a large simple hall. Changing the panel thickness may also change the dimensions of the accessories and the length of the fixings. Each cost variant should include its own complete set.
For the roof, list the ridge, eaves and side edge lengths, and for the walls the perimeters of openings and the corners. These quantities can be checked on the drawing. This gives the difference in accessory cost a visible justification and it does not get lost in one general surcharge per metre.
Does the price refer to the purchased or the installed area?
The panel list results from the modules and the cutting plan. The wall has a defined area after deducting the openings, but the order may require a larger square metreage. The cut-out piece cannot always be used in the adjacent field. Show both values in the comparison so as not to confuse the purchase price with the cost per metre of the finished cladding.
If 730 m² of purchased panels are used to create 700 m² of surface, dividing the value by 730 describes a different indicator than dividing by 700. Both can be useful, but they must have clear names. Apply the same principle to labour and additional works whose scope is defined by the contract.
How should installation and logistics be included?
A roof quote may include equipment and safety measures different from those in a wall quote. Long elements require appropriate lifting, and work around numerous openings takes more time than closing a regular field. Establish what the rate includes instead of assuming that every metre requires the same effort.
Compare transport for a specific schedule of lengths and number of packages. Check unloading and access conditions. The cost of the whole stage also includes equipment time and site preparation. With two material offers, add the same missing scopes before comparing the final result.
How can the comparison be updated without losing consistency?
Record the date, currency, method of tax calculation and validity period of each quote. When thickness, colour or length changes, mark a new version of the schedule. Do not update only the price of one item while leaving old additions. Such a sheet looks complete but may describe a solution that no one offers.
Before ordering, ask for confirmation of the final complete set for one version of the project. Separate agreed values from those assumed as approximate. This shows which price differences are real and which result from incomplete information about the cladding or the method of execution.
Questions and answers
Should a roof cost the same as a wall of the same thickness?
There is no such rule. Geometry, coverings, load requirements and accessories differ. Compare separate specifications within a common construction scope.
Is the catalogue price a binding construction quote?
Not necessarily. The offer confirms the value and scope of a specific order. The catalogue helps identify units and products, but does not automatically cover installation, transport or all details.
7 branches. Materials closer to your project.
