Roofing may be provided using a variety of materials depending on the needs and preferences of the Client.
- outer metal sheet/woolen isolation/inner metal sheet
Outer trapezoid metal sheet covered from outside with zinc alloy and aluminum, or polyester paint in RAL colour are attached to roof purlins using screws with neoprene washers. The inner metal sheets are covered with polyester paint in RAL colour from the underside and from the non-visible side with grey priming paint.
Glass wool mats are used most often as isolation – their thickness is decided depending on the needs of a chosen object. In halls requiring a high level of isolation 200mm mats are used. In halls with a lower level of isolation 100mm mats are used. In order to protect the mats from dampness they are isolated from the underside by a paraisolation layer made of a PE 0,2 mm foil.
- PCV roof membrane
Trapezoid metal sheets are fixed to roof purlins using srews with neoprene washers. The trapezoid metal sheets are covered with polyester paint in RAL colour from the underside and from the non-visible side with grey priming paint.
The most common isolation is polystyrene or a hard glass wool sheet – their thickness depends on the requirements of the project. In halls requiring a high level of isolation 200mm thick isolation is used, in other cases 150mm, or 140mm thick isolation may be used. The inner isolation is protected from dampness using a paraisolation PE 0,2 mm foil. The outer layer is a PCV roof membrane (foil).
- outer metal sheet / soft wool on a glass veil
The trapezoid metal sheets are covered with a zinc and aluminum alloy from both sides and are fixed to the roof purlins using cold rolled sections and screws with neoprene washers.
Mats of glass wool joint permanently with additional layers: aluminum foil – being the steam- and water-resistant factor, a glass wool net – used as a reinforcement element and a white vinyl-layering - being the visible element. The altogether thickness of the mat calculates to 140mm. The isolation is placed between the outer metal sheet and the purlins.
- layered sheets
Structure and isolation
A layered sheet based on purlins is both a construction and isolation element. Layered sheets are made of two facings made of metal sheet and a construction-isolation core. The core can be made of mineral wool, polyurethane foam, or polystyrene. The facings are made of steel sheets ranging from 0,5 mm to 0,6 mm in thickness. They are covered with polyester coating in colours from the RAL palette.