What is the purpose of the calotte when fastening a roof thermal panel?

The calotte is a profiled load-bearing element under the screw in the area of the roof rib. It helps distribute the pressure from the fastener along the shape of the rib instead of concentrating it only around the hole. Tesla Panels requires such an element when fixing their roof panels. The calotte does not replace the rubber seal, the correct screw, or the structural sizing of the fasteners.

What do the sizes 25, 35, and 40 mm mean for the calotte?

These are the three size labels in Shopify, but the product record does not include a drawing or specify whether the number refers to width, height, or another geometric measure. Therefore, 25, 35, and 40 mm should not be chosen based solely on the panel thickness. It is necessary to compare the calotte profile, the rib, and the screw hole with an exact sample or technical sheet.

In what colors is the calotte for thermal panels available?

The calotte comes in RAL 9002, RAL 3009, and RAL 7016 variants for each of the sizes 25, 35, and 40 mm, totaling nine combinations. The color matches the outer side of the roof panel but is not a criterion for mechanical compatibility. Shopify does not specify the type of coating, so if the fastener is visible, the finish of the physical part should be checked.

Is the same calotte used for panels with 3 and 5 ribs?

One calotte is not automatically considered compatible with both profiles. The number of ribs does not alone determine the shape and width of each rib, and the calotte must fit the specific profile without wobbling or local pressure. Shopify does not publish compatible models for the sizes 25, 35, and 40 mm. For 3- and 5-rib panels, the cross profile and system specification must be checked separately.

How is the calotte combined with the screw and rubber seal?

The calotte, screw, and seal must form one compatible fastening element: the hole accepts the screw, the profile rests on the rib, and the sealing remains even. Do not drill or enlarge the calotte to fit an unsuitable screw. The length of the fastener is determined after including the height of the rib and all layers down to the supporting base.

How can I check if the calotte is properly placed on the rib?

Before tightening, it should lie stably and symmetrically on the profile, without visible gaps or twisting. When tightening, the panel should not be crushed, and the seal must remain evenly compressed. If the calotte wobbles or does not follow the rib, the size or profile is unsuitable. The final check is done according to the instructions of the specific panel manufacturer.