The cost of a panel roof is the sum of material, details and installation. The price of the panel per m² shows only one part of the bill. On a small roof area, flashings and equipment delivery can account for a large share. It is worth comparing full variants with the same requirements. A simple example shows how the cost of a completed job arises from the panel price. Describe the function of the room, the temperature and the humidity. Check the loads, the purlin spacing and the fire requirements. Only on this basis is the core and thickness selected. A roof over a heated service outlet has different needs from a canopy over an open storage yard.

The pitch of a sandwich panel roof must suit the chosen system and drain water effectively. The limit value depends on, among other things, the joints and openings in the roof slope. In service, deflection, clean gutters and the condition of the seals also matter. A well-chosen fall helps, but does not make good execution defects. The roof must direct water to the designed drainage. Standing water extends the contact of the surface and joints with moisture. If leaves or dust collect in a depression, drying takes even longer. This does not mean that every visible drop indicates a defect. The problem is water permanently retained in a place that was meant to drain it away.

A sandwich roof panel is worth considering when you want efficient enclosure of a regular hall or farm building structure, rather than a quick substitution of insulation with sheet metal. Check, however, that the selection accounts for the support layout, slope length and pitch, not just core thickness. Ask for a panel schedule, fixing plan and flashing details, because only the complete roof confirms the declared performance. Also verify fire and acoustic requirements for the correct variant and how equipment loads are transferred.