SURFACE PREPARATION
Surface shall be clean, dry and free from loose particles Dust, loose materials and protrusions must be removed and cracks holes made good.
For better performance surface may be dampened but not wet, particularly in hot and dry weather.
APPLICATION BITUMINOUS PRIMER
Apply by means of brush, roller into the entire coverage area of the substrate and allow drying.
MEMBRANE
A bituminous waterproofing membrane manufactured by blending a mixture o bitumen and SBS(Styrene Butadiene Styrene) polymers to obtain excellent waterproofing and low temperature flexibility properties. The polymerized bitumen id coated onto a dimensionally stable reinforcement core of mom-woven spun bond polyester rot-proof fabric.
APPLICATION BITUMINOUS MEMBRANE
Bituminous membrane shall be laid fully torched on blinding concrete with minimum of 100mm end laps and 150mm side laps Waterproofing membrane installation shall be performed using cylinder fed propane gas torch, trowel to seal the seams of the membrane and knife for cutting.
The membrane is then placed in the correct torching on position then re-rolled for about half of its length without changing its orientation.
The membrane is then un-rolled again and torched on pressing the melted area against the substrate.
Repeat till the entire length of the membrane is bonded firmly onto the surface then the second membrane is laid in the same way with an overlap of 150mm at the end and 100mm at the side.
PROTECTION BOARD
Awazel MS 30 is a high performance semi rigid pre-formed protection board composed of mineralized polymer bitumen impregnated and coated with rot proof cares covered with polyethylene film on both sides.
APPLICATION
PROTECTION BOARD is to be installed over waterproofing membranes and may be easily cut with a knife to fit any profile. The board id semi rigid and will not crack when bent. Depending on the waterproofing system, the board may be welded into position by heating it with a gas torch.
An extra length of minimum 300mm of the horizontal membrane shall be left to carry up the vertical surface to maintain continuity of the membrane and be protected as above.
Inspection would be submitted for approval of the Engineer.
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