The key to a successful installation of modular metal roofing tiles is to establish the batten spacing precisely from the instructions for the specific model, not from dimensions carried over from another profile. Before laying the sheets, check the geometry and condition of the substrate and plan the eaves details and water drainage. Also confirm that the covering suits the roof pitch. Differences in the pressing can prevent the module from being supported correctly, so verify the dimensions and fixing sequence for the chosen product before starting permanent fixing.

A small module is easier to carry and to fit to a complex roof slope. A long sheet can efficiently cover a simple area. Neither solution wins on every building, however. You need to compare the cutting layout, delivery conditions and the requirements of the chosen profile. It also matters how a damaged section will be replaced later. A module has a fixed length and coverage width. Repeated elements form successive rows. Made-to-measure sheets are ordered in selected lengths, within the limits of the given technology. In both solutions, side joints remain. Long strips can reduce the number of transverse laps on a simple roof slope.

First, check how the roofer intends to resolve the specific roof details, not just the price per square metre. During the conversation, ask for a description of the substrate preparation, the fixing method for the covering and the sequence of work that will later be covered up. Note whether the contractor clearly separates material supply from labour and how they document any changes after uncovering the layers. Photos of valleys, eaves and chimneys give good insight, not only a view of the finished slope. On this basis it is easier to judge whether the offer matches the real conditions of your roof.