Commercial Roofing Contractor

LOOSE-LAID/BALLASTED SYSTEM - HEAVY TRAFFIC

1. SUBSTRATE

Typical: structural concrete

• The structure will be designed to support the paving slab and the traffic.
• 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*.

* Refer to the "welded seam technology" section

5. SEPARATION LAYER

Typical: 200µ min. polyethylene film.

• Install loose, with min. 100 mm overlap.

7. PAVING SLAB

Typical: tiles on cement/sand bed.

• Install loose, with butted joints covered by a self-adhesive tape.

Notes:
Refer to the local code requirements when applicable.
Reroofing projects will be subject to a specific study, including preliminary inspection.