Roof battens provide direct support and fixing points for the covering, so their layout must be decided before installation rather than corrected during the work. Instead of generic recommendations, check the spacing required by the instructions for the specific product and the cross-section determined by structural conditions. The first batten at the eaves is especially important, as it governs support for the start of the sheet and drainage into the gutter. Counter-battens, running along the slope, serve a different purpose and help create the ventilation space. Before fixing the whole framework, it is worth trialling a section of covering with the eaves components.

The way beams are connected depends primarily on the forces, geometry and location within the structure. Joining two lengths is different from connecting a rafter to a support. It is worth checking what forces the node must transfer and whether the joint matches the structural drawing. Cross-section, timber grade and moisture conditions must be considered. Merely butting two beam ends together does not restore continuity. Load capacity is determined by the whole detail, not by a number of random screws. That is why a carpenter needs a design, not just a photo from a neighbouring site.

The choice of roofing for a holiday home depends primarily on the intended use and the roof parameters. It is worth checking whether the building will be used only in summer or also in winter, as well as the roof pitch and support spacing. The risk of condensation, rain noise and the convenience of transporting sheets to the plot should be assessed. If heating is planned, the entire insulation system must be designed, not just the top layer. Location affects loads and maintenance. The covering alone will not ensure comfort without properly selected flashings, ventilation and fixings.

Begin by inspecting the trusses, supports and connections to find out where the leak originates. The cause may lie in the material itself or in a detail at the chimney, valley or eaves – in which case new sheets alone will not suffice. Only after this assessment should you choose the sheet metal, underlay and flashings, bearing in mind that T18, T35 and tile-profile sheeting reduce weight but will not strengthen a damaged structure. Plan the measurements, rain protection and inspection of each layer, and settle insulation, drainage and roof equipment straight away.

Before laying a new covering, check whether the old asbestos-cement really contains asbestos – not every fibre-cement sheet does. If asbestos is confirmed or even suspected, do not break, cut or remove the sheets yourself; leave the removal to a company equipped for such work, which should also take away the waste. Only then prepare the new roof layers and order the material, choosing from trapezoidal sheet metal, modular metal tiles or an insulated roof panel. The decision depends on the structure’s condition, the roof pitch and how the building is used.