Frequently asked questions about the Roof category
Roof — what is it and why is a roof needed?
Roof is the top part of a building that protects interiors from rain, snow, wind and sun while providing thermal and vapour barriers. Proper selection of materials and layers (structural frame, underlays, surface roofing) increases durability, prevents water ingress and improves energy efficiency.
What roofing materials are available in the "Roof" category?
The category includes concrete and clay roof tiles, Eterniit fibre cement, sheet roofing, PVC roofing materials, bitumen roofing, roofing underlays and tapes, plus paints and other roofing accessories.
How to choose between bitumen shingles and metal roofing for a house?
Bitumen shingles are flexible, suitable for complex roof shapes, easy to install and provide good sound insulation. Metal roofing is durable, long-lasting and fire-resistant but requires a proper substructure and additional sound insulation for rain noise.
What is Eterniit (fibre cement) and where is it used?
Eterniit is a fibre-cement sheet used for roofing and cladding. It is weather- and fire-resistant, commonly available in sheets like 1250x1150 mm in various colours, suitable for pitched roofs and extensions.
What Eterniit sheet sizes are listed in the catalogue?
The catalogue lists Eterniit sheets in 1250x1150 mm sizes and related components such as ridge/edge plates 480x230 mm, suitable for pitched roof coverage and trim elements.
Which roofing underlays and tapes are needed for installing soft bitumen roofing?
For soft bitumen roofing use vapour-control and waterproof underlays plus butyl or butyl-aluminium sealing tapes for seams and penetrations. These products ensure watertightness and protect insulation from moisture.
Which roofing accessories are commonly purchased with the materials?
Common accessories include ridge and edge trims, roofing screws/nails (e.g. for bitumen sheets), snow guards and ventilation flashings. These components ensure correct installation and long-term performance.
What roof types are mentioned in the category description and how do they affect material choice?
The description lists pitched (gable), flat and green roofs. Pitched roofs suit tiles, Eterniit and bitumen; flat roofs require bitumen, PVC or reinforced waterproofing; green roofs need multi‑layer systems with drainage and root protection.
Which roof paints and coatings are suitable for restoring an old roof?
Suitable products include elastic bitumen or polymer mastics for bitumen and metal surfaces, and acrylic coatings for concrete and tiled roofs. Surfaces must be cleaned and primed before application.
Which technical parameters to check on datasheets when choosing roofing materials?
Check material type (bitumen, metal, clay, fibre cement), dimensions (e.g. 1250x1150 mm, 930x2000 mm), frost resistance, waterproofing, fire rating and recommended roof pitch. These determine suitability, installation and longevity.