Installing made-to-length metal roof tiles: from measurement to handover

The order drawing should show slope dimensions, diagonals and openings. Lengths must account for profile-step limitations, laps and cuts, not just the distance to the eaves. Where many short sections occur, compare long-sheet cutting plans with modular roofing before buying.

Count the components and inspect packaging and coatings on delivery. Carry long sheets with suitable support, without dragging them across other sheets. Identify transport bends before they interfere with joint alignment on the roof.

Arrange packs in the installation sequence and label them against the roof drawing. Sheets needed first should be accessible. Less rearranging reduces scratches and the risk of different workers confusing sheet lengths.

Battens must provide the correct plane, stiffness and spacing for the chosen roof-tile module. The first batten at the eaves may need a different arrangement. Do not adopt spacing from a visually similar model without confirmation in the instructions.

Before fitting sheets, install the required underlay, ventilation route and preceding flashings. Check drainage at the eaves and the insulated assembly’s connections. The metal surface does not replace internal airtightness or a properly detailed wall-plate junction.

The starting sheets establish alignment with the eaves and slope edge. Regular checks prevent errors from accumulating. Correct the setting-out rather than stretching laps or forcing sheets to bend into place.

Joint geometry determines the laying direction. If edges do not fit naturally, check alignment, the support and material condition. Extra screws do not remove the cause of poor fit and must not substitute for correct joint geometry.

Choose screws for the substrate and their pattern for the instructions and design loads. Sealing washers need correct compression, neither loose nor crushed. Roof edges and accessories may need different fixing arrangements from the central field.

An approved cutting tool protects the coating from overheating. Abrasive discs can damage edges and nearby sheets with hot particles. Remove cutting and drilling swarf immediately, including from recesses; the first rainfall is not a cleaning method.

Prepare separate details for chimneys, valleys, ridges and verges. Flashings must shed water while maintaining necessary ventilation. Match their shape to the profile; a matching colour does not establish technical compatibility.

Service penetrations must fit the roofing model rather than depend on thick filler. Components exposed to snow loads or maintenance traffic need a load path into the structure. A thin sheet alone is not a universal equipment support.

Inspect laps, screws, coating and drainage, including valleys and the uphill sides of chimneys. Remove swarf, waste and protective film within the required timeframe. Detail photographs and material documents help later inspections and investigation of defects.

Walking on completed metal roofing requires suitable footholds and fall protection. Agree maintenance procedures with the contractor. An attractive, watertight roof depends on coordinated measurement, support preparation and installation, not sheet quality alone.