FAQ
Will new asphalt survive Mumbai monsoon?
Yes — if it's specified and laid correctly. Mumbai gets 2,400 mm of rain in four months. Standard thin overlays crack at the edges, let water under the mat, and heave by November. We use 60/70 penetration-grade bitumen blended with anti-stripping agent, compacted to 97% Marshall density. Water has nowhere to go except off the surface.
The critical detail most crews skip: the tack coat. A proper 0.3 kg/m² bitumen emulsion tack between the base course and wearing course bonds the layers so they move together in the heat — not apart. Debonded layers are what you see bubbling on Linking Road every August.
We also cut and seal every edge against kerbs and walls. Water infiltration is an edge problem 80% of the time. A sealed edge means the surface performs for 5–7 years, not 18 months.
Pavement Cross-Section — Standard Mumbai Specification
Material & Spec Reference
Bitumen grade
VG-30 (60/70 Pen)
Compaction target
≥ 97% Marshall
Tack coat rate
0.25–0.35 kg/m²
Edge sealing
Bituminous sealant, all perimeters

Project Reference
Scope
2,800 sq. ft. internal road + speed-breakers, overlay on failing WBM base
Outcome
Surface intact after 3 monsoons. Zero pothole patches required.


