How do you compare two variants of insulated wall panels with a mineral wool core?

For comparison, it is best to use neutral designations A and B. Record an identical range of information for both. If one column gives mass per square metre and the other per metre of length, first unify the units. Otherwise the table may suggest a difference that does not actually exist.

The wool density describes the core, while the panel mass also includes the steel sheets and other layers. The weight of the entire panel must not be calculated solely as thickness times density. In thin variants, the contribution of the facings is significant. Two panels with the same core may weigh differently if they differ in steel thickness.

An example panel 100 mm with a 105 kg/m³ core and 0.5/0.6 mm sheets has a mass of 20.3 kg per metre of length at a covering width of 1 m. This is simultaneously 20.3 kg/m². For another module, the two figures would not be equal. Such data should not be transferred to a variant with 0.5/0.5 mm facings.

There is no simple rule that greater weight means a lower U-value. Thermal insulation is determined by the properties of the core, its thickness and the panel design. Compare the values declared for complete variants. Do not draw a conclusion from the wool density alone or from the name of the version.

One may encounter a 100 mm panel with U 0.44 W/(m²·K), but also another with a value of 0.38 at the same nominal thickness. This is not proof that one is superior in every respect. A lower U-value describes heat flow. It does not determine span, fire resistance or the coating for a specific environment.

A variant with concealed fastening allows the fastener to be hidden in the panel joint zone. This changes the edge detail and the way the joint works. It does not mean there are no fasteners or that supports can be positioned arbitrarily. The solution must be assessed on the basis of the documentation for the specific system.

A visible screw head is sometimes accepted on a technical wall. In a small retail unit, the client may choose a smoother façade finish. In both cases, airtightness, the choice of fixing and the quality of installation matter. Aesthetics do not replace checking loads and the width of the bearing surface.

Enter each property separately. Fire reaction A2-s1,d0 does not automatically give the same EI class in both variants. The acoustic result relates to a specific assembly. Load tables refer to the stated sheet thicknesses, number of spans and deflection criteria. It is not worth creating a single ranking based on only one column.

If the wall is to shield a room with equipment, noise passing through doors and openings is also important. If it stands in open terrain, wind loads will be significant. A good choice results from the operating conditions of the entire envelope. These conditions may differ for two seemingly identical pavilions.

The surcharge is justified when you are buying a property you need. This may be a specific classification, a stiffer facing or a desired façade detail. If both panels meet all requirements, it is worth comparing the cost of the finished wall. Include fixings, flashings, transport and installation, not just the price per square metre of the panel.

For several repeatable buildings, record one approved specification. Check every variant change against the same list of parameters. This helps limit accidental substitutions between deliveries. A difference in designation is not always significant, but identical thickness also does not guarantee conformity.

Assume option B costs an extra €2.78/m². For 48 m² of panels the difference is €133.44 before other costs. Include any different flashings needed for B, and allow for any savings from an approved simplification of the structure. The figures illustrate the comparison and are not current prices.