A time-tested waterproofing method trusted by Southern California roofers and builders for decades.
Hot mop roofing is a traditional built-up waterproofing method that has been a staple of Southern California construction for generations. The process involves layering roofing felt with hot-applied liquid asphalt, creating a thick, seamless, fully bonded membrane that provides exceptional waterproofing and durability. It is most commonly used on flat and low-slope roofs, as well as shower pans and interior waterproofing applications in residential construction.
Despite the emergence of newer roofing systems, hot mop remains a preferred method for many contractors and builders in Southern California — and for good reason. The system is proven, reliable, and when installed correctly, delivers outstanding waterproofing performance at a competitive cost. Its multi-layer construction provides redundancy that single-ply systems simply can't match, and its compatibility with the region's climate and building styles makes it a practical choice for both new construction and re-roofing projects.
• Proven, time-tested waterproofing performance
• Seamless multi-layer membrane with built-in redundancy
• Excellent compatibility with flat and low-slope roof designs
• Cost-effective solution for both residential and commercial applications
• Widely accepted by Southern California building departments and inspectors
• Suitable for both roof decks and interior shower pan waterproofing
At Advanced Roofing and Sons, Inc., hot mop is a method our team has mastered over more than three decades of roofing across Southern California. We apply it with the same craftsmanship and attention to detail we bring to every job — ensuring a watertight result that holds up for years.
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