Zamil Plastics: Factory Roof Waterproofing in Dammam

Project photos

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

The challenge

Zamil Plastics' roofs cover production areas where water ingress can damage machinery and raw materials. The side and end laps across the roof, and the valley lines where the slopes meet, had become the main paths for water during rain.

What ETCE did

ETCE sealed the side laps and end laps across the roof with EPDM strips and lined the valley lines with wide EPDM runs. As each section was completed, the team flood-tested it with hoses before moving on to the next.

Failure points treated on this roof

• Side laps (vertical joints)

  Vertical overlaps sealed along their full run so wind-driven rain cannot track in.

• End laps (horizontal joints)

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

• Eave, valley & box gutters

  Gutter beds lined with a jointless EPDM sheet dressed up under the roof sheets.

• Flood / water testing

  Treated zones hosed and flood-tested on site before handover.

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

Every treated section was proven watertight on site, giving Zamil Plastics a roof system backed by testing rather than assumptions.