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Methodology For Seepage Barrier Lining
Scope
This specification covers supply, laying,welding, repairing and protection of under slab seepage barrier lining for preventing the penetration through the slab of damaging alkaline salts, moisture, mold, radon gas and water seepage.
Surface Preparation
Material
- Seepage Barrier lines of thickness of 0.25mm -1.5mm for the area of coverage
- Seepage liner should be smooth, uniform in colour, texture & finish, free from pin holes, un dispersed raw material, streaks & particles of foreign matter, no other visible defects uch as melt fracture, holes, tears or blisters dry.
Installation
- Unroll the Seepage barrier sheet above well prepared surface with the longest dimension parallel with the direction of the po
- Mark 100 mm overlaps over the edges of liner (length and widthwise) by drawing a white line using a marker pencil
- Adjacent layers shall be laid within 100 mm overlap
- The overlaps shall be cleaned to ensure free from dirt and moisture
- Overlaps are welded with Leister automatic/ hand held hot air fusion welding machine with correct temperature, pressure and speed
Terminations
