Installation

Substrate Preparation

• All substrates to which the Cosmofin membrane is to be applied must be sound, smooth, clean, dry and free from the residues of any foreign material.
• Oil or bitumen residues must be removed.
• Check the existing bond and/ or compatibility before deciding to leave existing membranes in position. While laying the membrane, keep the substance swept clean and prevent stones or debris from lodging under the membrane.

Membrane Laying and Lap Welding

• Layout: Set out the rolls so that they are used most economically, and the welds are minimised.
• Side laps: Overlap each roll a minimum of 50 mm and weld the full width.
• End laps: All as side laps.
• Multi lap junctions (capillaries): Where these occur they are to be welded tight. Sealants should not be used.
• Cut edges: All sheet or patch edges where the selvedge is cut away, should be dressed with Cosmofin Liquid so that they are "closed" against ponding water.

Upstand and Perimeter Terminations

Profile Fixing

• COSMOFINSTEEL profiles are supplied in 2 metre lengths. Space them 2 mm apart and join with 50 wide welded patches for the full girth of the profile. This jointing process is not required for Type C 2. Fix all profiles at 200 mm centres.

Technical Assistance

• Projex staff are available on request to provide any assistance required.

Deck		Detailing
Underwater		Wall under water