Ridge tiles are located in the most exposed part of the roof. Their surface is subjected to sun, precipitation and temperature changes. The choice of material therefore matters, but it does not explain everything. The durability of the ridge is also determined by the shape of the flashing, the condition of the edges and correct connections. It is worth assessing the whole detail before assuming that the colour alone or the name of the coating will deliver the expected result. Surface heating depends on its colour, finish and exposure conditions. A dark flashing may perform under different conditions than a light one on a shaded roof slope. This does not mean dark colours are prohibited. It means the coating and detail need to be matched to the actual application.

A steel external window sill primarily drains water from beneath the window and protects the façade, so when choosing one it is worth looking not only at colour but at the fall, drip edge and connection to the window. Coated sheet metal offers wide scope to match gutters, roof or joinery, and its low weight makes transport and work easier. Compare physical samples under the same lighting before ordering. Differences in gloss and texture can be hard to see on a screen.