A large flat commercial roof with a high-performance white waterproofing membrane

Roof & Roof Deck Waterproofing

Specialized flat roof and walking roof deck waterproofing systems engineered for UV protection and long-term durability.

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High-Performance Roofing Solutions

Seamless Liquid-Applied Membranes

Ponding Water Resistant Technology

Reinforced Transition & Corner Sealing

Roof & Roof Deck Waterproofing

SPL Waterproofing provides advanced protection for one of your building’s most vulnerable surfaces: the roof. Whether you have a commercial flat roof or a residential walking deck, our systems are engineered to withstand the harshest California conditions.


Flat roof waterproofing project


Engineered for Southern California

Flat roofs and roof decks in Los Angeles and Orange County face unique challenges. The combination of high UV exposure and low-slope drainage requirements means that standard roofing often fails prematurely.

Walking Roof Decks: The Best of Both Worlds

A roof deck serves as both a roof for the room below and a floor for the occupants above. This dual role requires a specialized approach:

  • Structural Integrity: The system must be strong enough to support furniture and foot traffic.
  • Absolute Waterproofing: It must maintain a perfect seal to protect the living space below.
  • Aesthetic Finish: It should look as good as it performs.

We specialize in decorative, slip-resistant walking deck systems that turn your roof into a functional, beautiful outdoor space.

Commercial Flat Roof Restoration

Don’t replace your roof when you can restore it. Our liquid-applied membrane systems can often be installed directly over existing roofing, creating a seamless, “new” roof surface for a fraction of the cost of a full tear-off.

  • No Seams: Eliminates the most common point of failure.
  • Sustainable: Reduces landfill waste and construction noise.
  • Warranted Performance: Systems backed by manufacturer and workmanship warranties.

Extend the life of your roof. Schedule a professional roof inspection with SPL Waterproofing today.

Frequently Asked Questions

What is the benefit of a cool roof coating?

Cool roof coatings reflect more sunlight and absorb less heat than standard roofing materials, significantly reducing energy costs and extending the life of the roof membrane.

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Can a flat roof be converted into a walking deck?

Yes, but it requires a specialized reinforced waterproofing system designed specifically for foot traffic and UV exposure.

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How do you handle ponding water?

We use premium materials specifically engineered to withstand standing water without degrading, and we can often adjust slopes during the preparation phase.

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