How do I order made-to-measure tile-effect metal roofing after measuring the roof truss?

For a renovation, some data can be gathered in advance, but the scope of work may change once the structure is exposed. Agree with the contractor when dimensions are to be approved. Ordering long elements before deciding on a correction to the eaves or ridge increases the risk of error. Later cutting does not always resolve the problem of the rhythm of the profiling.

Mark each roof slope separately. Give the length in the direction of flow, the width at the eaves and the shape of the hips. Mark chimneys, windows and penetrations. Add information on the planned overhang of the covering and edge details. Do not add a random allowance to all dimensions yourself.

The sheet schedule records the length and number of pieces. The order of laying on the roof slope is also important. If there are transverse joints, the correct overlap must be taken into account. The production length is not always an arbitrary dimension to the millimetre. Restrictions arise from the profile, the module and the manufacturing technology.

The effective cover is used to divide the roof slope. For example, assume a roof width of 10.3 m and an effective cover of the selected sheet of 1.15 m. Nine strips are needed, because eight would cover only 9.2 m. The total cover of nine is 10.35 m. The outer termination still has to be matched to the detail.

This is an illustrative calculation. The actual number of sheets also depends on the direction of installation and the geometry of the edges. With hips, it is worth preparing a drawn layout to see the possible use of offcuts. Simply dividing the roof area by the sheet area does not give a reliable order for a complex roof slope.

Give the profile, steel thickness, coating, colour and the expected surface finish. Specify whether the order also includes flashings and fastenings. If the new part is to match an existing roof, include the designation of the old material and a sample. A photograph from a phone can distort the shade and the gloss.

It is worth separating essential requirements from preferences. For example, conformity with the design and minimum pitch are technical conditions. The colour may allow several variants. A request prepared in this way makes it easier to compare proposals without accidentally swapping parameters. A shared entry of ‘graphite tile-effect metal roofing’ is not enough.

An example complete request may contain three groups: covering according to numbered roof slopes, flashings according to cross-sections, and mounting accessories. Add the delivery address, access conditions and required deadline. It is worth giving the amount for each group separately. This will make later adjustments to the scope easier without losing information about the parameters of the sheet itself.

Check access, the unloading location and how the sheet will be passed onto the roof. A length that is convenient on the slope may be troublesome at a narrow gate or with trees. The material should have suitable support during transport and carrying. It must not be allowed to bend under its own weight.

Establish who provides the equipment and whether the carrier performs unloading. It is worth preparing the package according to the order of works if the supplier offers this option. For two construction stages, agree the dates with the team. Sheet waiting a long time on site requires proper, dry storage. The transport film does not replace this protection.

Compare the number and lengths of sheets with the approved schedule. Inspect the edges, coating and signs of transport damage. Record discrepancies before starting cutting. It is also worth checking the first flashing at the eaves and gable edge. Its misfit may indicate an error in the entire set.

After installation, keep the final version of the measurements and the material description. For later repair, this will make it easier to order the correct element. If lengths or a detail were changed during work, note this on the drawing. An old schedule without corrections may lead to the same mistake being repeated in the future.