Insulation fixed on top of the roof structure- mounting on top of the bearers : metal sheets

This construction ensures extra safety when metal sheets are used as roof deck.

Please consult the manufacturer's instructions for the mounting of the metal sheets.

Due to the phenomenon "supercooling" of metal sheets, the risk of condensation is larger than when using corrugated sheets. Therefore, it is necessary to pay extra attention to the drainage of condensation water.

When the metal sheets are directly mounted on the insulating boards, the contact surface would be too large and the thermal load would be too heavy.

The construction described takes these facts into consideration.

The border finishing - type "W" combined with matching Z-profile and sealed on top with a waterproof, elastic tape - ensures a continuous insulating shield.

LEGEND

1. Metal sheet
2. Wood lath 50 x 70 mm
3. Transverse member 22 x 68 mm
4. Waterproof elastic tape
5. EUROTHANE
6. "W" type border finishing
7. Z-profile
8. Bearer

On top of this tape a wooden transverse member is attached from ridge to gutter, assuring an extra clamping of the structure and meanwhile enabling the draining of condensation water.

Square with these members, wood laths are mounted, serving as support for the metal deck. By using this lathing, every direct thermal contact with the insulation is avoided.

Due to its closed character, a roof construction with metal sheets is more susceptible to wind loads. Therefore, lathing dimensions and fastenings have to be thoroughly examined.