Metal roofing is a covering made from shaped metal sheet, most commonly coated galvanised steel or aluminium, used on saunas, pergolas and wellness structures. It comes as trapezoidal profile, standing-seam panels or tile-effect sheets, with individual strips joined by overlap or seaming that keeps the roof watertight without fasteners penetrating the covering surface. Compared with bitumen shingle, metal roofing typically offers a longer service life and lower weight per square metre. A surface coating, for example polyester or an aluminium-zinc layer, protects the steel against corrosion. Roof pitch and fixing method are specified according to the wind and snow loads for the given location.
For a garden sauna, a gazebo or a utility shelter the choice is usually between sheet metal roofing and bitumen shingle. Each of them has different strengths.
| Metal roof | Bitumen shingle | |
|---|---|---|
| Weight | Low | Higher |
| Minimum roof pitch | Lower | Higher |
| Noise in rain | More noticeable | Muffled |
| Speed of installation | Faster | Slower |
| Snow sliding off | Easier | Harder |
| Adaptability to shape | Limited | High |
| Repair of local damage | Replacement of a whole sheet | Replacement of individual shingles |
Noise in the rain is the most common objection to sheet metal, and it can be worked with. Solid boarding instead of battens helps, as does an underlay beneath the covering and insulation in the roof, which damps the sound. On an insulated sauna cabin with an insulating layer in the roof, the difference compared with an uninsulated shelter is marked.
Related terms: Bitumen shingle, PAROC 10 cm insulation, EPDM membrane, Drainage system.
We're happy to help personally. Leave us your contact, or write or call us:
+421 940 916 815 info@luxurelax.sk