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MECHANICALLY ATTACHED ROOFING SYSTEM (FIXING BAR OPTION)

1. SUBSTRATE

Typical: structural concrete

  • The substrate will provide for the required fasteners' minimum pull-out resistance: steeldeck: 1.700 N plywood: 2.000 N concrete: 2.500 N
  • Concrete: the substrate will be clean, dry, smooth and free from contaminants.
  • Although dead level is acceptable, a slope is recommended for roof drainage.
  • All vertical surfaces will be compatible with the Flashing/Substrate Adhesive.*

* Refer to technical data sheet

2.VAPOUR CONTROL LAYER

Typical: 200µ polyethylene film

  • The material type will be specified if/as required by the dew point calculation.
  • Install PE loose-laid with 100mm overlap and taped seam, other types as specified by manufacturer.

3. INSULATION

Typical: Class C mineral wool

  • Any Class C or Class D UEAtc approved roofing board with the required thickness is also acceptable.
  • The boards will be mechanically secured as per the insulation manufacturer's recommendations.
  • Taper the joints at roofdrains.
  • Should insulation not be used (concrete), a protection layer (geotextile 300-400 g/m²) should be installed.

4.SINTOFOIL MEMBRANE

Typical: ST/Grey/1.2 mm

  • Install the membrane with overlap and welded seam as per specifications.*
  • Mechanically secure the membrane to the deck according to the wind uplift pattern using fixing bars and approved fasteners.
  • Cover the fixing bars with a Sintofoil ST/1.2 mm strip (min. 150 mm) welded on both sides to membrane.
  • The membrane will be mechanically secured at roof perimeter and around protrusions.
  • The RG type membrane is recommended, would aesthetics (wrinkles) be an issue.

* Refer to "welded seam technology" section

5.TRAFFIC

Typical: smooth round river washed gravel, ø 12-35 mm, 60kg/m² min.

  • The installed membrane will be protected from following other trades' work.
  • Walkways (if required): SLM walkways or a 1.5 mm Sintofoil roll 1.05 m wide, welded to the membrane.

Notes:
The architect is responsible for the wind study and the resulting fastening pattern.
Refer to the local code requirements when applicable. Reroofing projects will be subject to a specific study, including preliminary inspection and pull-out testings.

Roofing System