The cost of a sandwich panel roof consists of many items, although the rate for the panel usually attracts the most attention. You also need to calculate the actual roof slope, the cutting layout, the joints, the flashings and the crew's work. A detailed schedule allows you to compare quotes for the same roof and to see whether an attractive price omits part of the required scope. The length of the roof slope is measured in the direction of the fall, taking into account the eaves detail and the joints. The area of the horizontal projection may differ from it. On the drawing, also mark openings, skylights and points of contact with other elements. Do not automatically deduct them from the purchase, because an opening is often cut from a full panel.

Eaves gutter flashings direct water from the roof covering towards the gutter. On a sandwich panel roof, the eaves also require the exposed parts to be closed off and a proper connection to the wall. The eaves must therefore be considered as an assembly of components. The eaves gutter flashing, the core cover and the profile associated with the gutter can perform different tasks. Combining them at random impedes drainage even when each element has been carefully made on its own. The drawing should show how the outer and inner panel skins are terminated. The position of the core, the wall and the gutter is also required. In some solutions the terminations of the layers are offset relative to one another. This is a feature of the specific detail that must be taken into account when ordering flashings.