Insulation fixed to the bottom of the roof structure - nailed: fastening of thin boards with screws or twisted nails with plastic cap

It is prefered to make three high-quality fastenings per bearer at 20 cm from the ends and in the centre of the board width .

The use of screws or twisted nails and washers is recommended. In each case, the fastenings have to penetrate the wood with at least 3 cm.

Bearer distance max 1350 mm.

A seam finish with waterproof tape is recommended.

LEGEND

1. Corrugated sheets
2. Bearer
3. EUROTHANE
4. Rebate on longitudinal side
5. Vapour seal tape
6. Nails or screws

Recticel points to the risk of accumulation of moist behind the bearers.

As a consequence, this construction is to be avoided in particular with metal roofing panels.

The QUATTRO-system is recommended when a flat ceiling and a good sealing of the seams is desired or in case of ventilation or the prevention of condensation.