SASIB: Metal Roof Waterproofing in Dammam

Project photos

Tap any photo to enlarge. All photos were taken on site by the ETCE team.

The challenge

SASIB's roof carries large exhaust hoods, gooseneck vents and turbine ventilators, and it meets a parapet wall along one edge. The bases of these units and the roof-to-parapet junction had become the main entry points for water.

What ETCE did

ETCE sealed each exhaust hood and vent base with EPDM shaped to the sheet profile, flashed the turbine ventilators, sealed the roof-to-parapet junction and closed the end laps across the slope with EPDM strips.

Failure points treated on this roof

• Roof hoods, cowls & AHU curbs

  Exhaust hoods, cowl vents and equipment curbs sealed where they sit on the roof.

• Pipe & cable penetrations

  Every pipe and cable through the roof or wall sealed with a bonded EPDM collar.

• Roof-to-wall flashings & parapets

  Junctions between roof, walls, parapets and platforms sealed and turned up.

• Turbine ventilators & fan units

  Ventilator bases flashed with EPDM shaped over the sheet ribs.

• End laps (horizontal joints)

  Horizontal sheet overlaps cleaned and closed with a continuous EPDM strip.

Materials & method

• EPDM membrane (1.2 mm) cut to width for each detail: UV-stable and flexible at Gulf roof temperatures.
• Promax Bonding Adhesive, rated for surface temperatures up to 120°C, for a permanent bond to the metal sheets.
• Preparation first: old coatings, failed sealant and loose rust removed so the membrane bonds to sound metal.
• Roof-side, zone-by-zone execution so the building below keeps operating with no shutdown.
• Working-at-height HSE: trained crews, full PPE and safety lifelines on every roof.

The result

The roof-mounted equipment and edge details are now sealed with one consistent membrane system that the client's maintenance team can walk and inspect.