Waterproofing of walls, roofs and parking areas is a growth industry in Lebanese building construction.

Bituminous Membrane WaterProofing

Specifications	Approx Cost
Prepare surfaces, supply and apply waterproofing system:
Cement and leveling screed laid to falls and cross falls (average thickness 70mm)	$15-$18/m²
40mm x 40mm triangular cement and sand angle fillet to roof concrete upstand	$3-$4/Im
50mm thick extruded polystyrene rigid insulation boards (35kg/m² density)	$10-$12/m²
As above, 20mm thick fixed vertically to external walls	$6-$8/m²
1,000 gauge polyethylene sheets laid horizontally including overlaps	$4/m²
4mm single ply APP (polypropylene and polyester) modified bitumen waterproofing membrane	$10-$12/m²
Anti-root membrane (single layer)	$12-$14/m²
Geotextile filter membrane including overlaps (105g/m² density)	$2-$4/m²
50mm thick gravel bed	$6/m²

Sheet Membrane WaterProofing

Specifications	Approx Cost
Supply and apply EPDM membrane rubber elastomeric waterproofing membrane 1.5mm thick, loose-laid on concrete flat roof with 150mm overlaps, fully adhered by means of bonding adhesive, area of concrete not less than 1,500m²	$25-$32/m²
Supply and apply EPDM membrane flashing to roof parapet/upstands, (1.5mm) thick, 250mm average height, fully bonded with bonding adhesive	$9-$12/Im
Supply and fix aluminum strip bar 3mm thick x 25mm girth including Sealant pointing to upper ends of parapet skirting upstands	$10-$15/m²
Supply and install extruded polypropylene boards, 2mm minimum thickness, lose laid	$5-$6/m²
50mm thick gravel bed	$6/m²

Fluid Applied WaterProofing – Parking Areas

Specifications	Approx Cost
Surface preparation of concrete surfaces and substrate receiving the polyurethane fluid applied waterproofing	$10-$15/m²
Supply and apply vapor barrier, water-based material, imported from USA	$7/m²
Supply and apply polyurethane liquid, cold applied membrane for parking areas	$12-$17/m²