Application
Roof Waterproofing Systems in Pakistan
Roof waterproofing in Pakistan must resist high UV, summer temperatures, monsoon wetting, and follow-on traffic during maintenance. Petroseal typically specifies APP-modified torch membranes as exposed or protected cap sheets, polyurethane liquid systems where seamless coating is preferred, and coordinated insulation (XPS/PUF via Green Insulation) where thermal performance is required. Surfacing (aluminum, granular, or protected screed) must match exposure.
Recommended systems
Match site condition to a Petroseal system page.
| Condition | Recommended system |
|---|---|
| Exposed flat roof | APP membrane roof system |
| Seamless liquid roof | Polyurethane roof waterproofing |
| Insulated waterproof roof | Bitumen membrane + XPS/PUF |
Technical requirements
- —Dry, primed substrate; falls to outlets verified
- —Correct lap welding and upstand heights
- —Protection or UV-stable surfacing for exposure class
Limitations
- —Plain PE-film membrane is not a permanent UV finish
- —Liquid systems require weather windows and skilled applicators
Application sequence
- Survey falls, outlets, and existing defects
- Select APP, SBS, or liquid system
- Prime, install, detail upstands
- Protect and commission drainage
Common failure modes
- —Ponding due to inadequate falls
- —Open laps at upstands
- —Mechanical damage from unprotected traffic
Related systems
- APP Waterproofing System
APP waterproofing systems use atactic-polypropylene modified bitumen membranes with high heat resistance for exposed and…
- Polyurethane Waterproofing System
Polyurethane waterproofing systems apply liquid coatings that cure into seamless membranes—useful on complex geometry, d…
- Bitumen Membrane Waterproofing System
Bitumen membrane systems use prefabricated APP or SBS modified sheets torch-welded at laps to form a continuous waterpro…
Related products
- PetroGrip APP
APP-modified torch membrane—2mm to 4mm with plain, aluminum, or granular surfacing.
- Polyurethane Chemical Coatings
Seamless liquid waterproofing for roofs, terraces, and industrial floors.
- XPS Foam Board
Extruded polystyrene boards for thermal efficiency on roofs and walls.
- PU Foam Insulation
Rigid PUF boards and spray foam for high R-value roof and wall insulation.
Related projects
- Allama Iqbal International Airport
Lahore · Infrastructure
- Metro Cash & Carry
Lahore · Commercial
- Honda Car Plant
Multan Road, Lahore · Industrial
Technical downloads
- PetroGrip APP Polyester Fiberglass Membrane TDS
APP-modified torch-applied membrane with composite polyester + fiberglass reinforcement — 3 mm and 4 mm plain PE film finish.
Technical guides
- Waterproofing Companies and Membrane Manufacturers in Pakistan (2026)
How Pakistani waterproofing contractors, APP/SBS manufacturers, and international brands compare—and where Petroseal Enterprises fits as a Lahore-based manufacturer with project-backed systems.
- APP vs SBS for Pakistan’s Climate (Roofs and Below Grade)
Heat, UV, monsoon recharge, and thermal movement—when PetroGrip APP caps beat SBS on Punjab roofs and when SBS is mandatory below grade.
- Torch-Applied Waterproofing: PetroGrip Site Practice
How PetroGrip torch-applied bitumen membranes are specified, primed, and welded on roofs and podiums—with quality checks that protect your warranty.
- APP vs SBS Bitumen Membrane: Which PetroGrip System Fits Your Project?
Compare PetroGrip APP and SBS torch-applied membranes—modifier chemistry, surfacing options, and where each system belongs in roof and below-grade build-ups across Pakistan.
FAQ
- Is APP or SBS better for roofs in Pakistan?
- APP is generally preferred for exposed roof cap sheets because of heat and UV stability. SBS is often preferred where greater flexibility is needed. Petroseal manufactures both.