1. SUBSTRATE

Typical: structural concrete

• The structure will be designed to support the ballast weight.
• The substrate will be clean, dry, smooth and free from contamination.
• Although dead level is acceptable, a slope is recommended for roof drainage.
• All vertical surfaces will be compatible with Rubberfuse
  Flashing/Substrate Adhesive*.

* Refer to technical data sheet

2. VAPOUR CONTROL LAYER

Typical: 200µ polyethylene film

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

3. INSULATION

Typical: 25 kg/m² expanded polystyrene

• Any UEAtc approved roofing board with the required thickness is also acceptable.
• Install loose with staggered joints, avoiding gaps in excess of 6mm.
• 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/Black/1.2 mm

• Any other type of Sintofoil membrane is also acceptable.
• Install loose, with overlap and welded seam as per specifications*.
• The membrane will be mechanically secured at roof perimeter and around protrusions.

* Refer to the "welded seam technology" section

5. BALLAST

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

• The ballast's weight will be sufficient to resist the wind uplift pressure.
• Should non typical ballast be used,a 200-400 g/m² protective mat should be installed.
• Do not stockpile the ballast.

6.TRAFFIC

• The installed membrane will be protected from following other trades' work.
• If required, walkways, usually pavers on geotextile layer, will be installed.