The Terra-Petra Waterproofing Division team will be exhibiting at the RCI Trade Show Exhibit in Houston

Terra-Petra Waterproofing Division to Exhibit at RCI International Convention & Trade Show

The Terra-Petra Waterproofing Division team will be exhibiting at the RCI International Convention & Trade Show at Houston’s George R. Brown Convention Center — Saturday March 24th (3:15pm – 7:15pm) through Sunday March 25th (8:45am – 12pm) in booth #334. 

Stop by to learn more about the BUILDING ENVELOPE CONSULTING * ELECTRONIC LEAK DETECTION * CERTIFIED AIR & WATER TESTING  * INSPECTION & MONITORING services offered by the Terra-Petra Waterproofing Division.


The RCI, Inc. International Trade Show offers attendees the chance to meet and learn from representatives from over 130 manufacturers of roofing, waterproofing, and exterior wall products. 

Terra-Petra Waterproofing Division provides inspection services for new Trammell Crow Residential project in West Hollywood

Domain, a mixed-use development from Trammell Crow Residential, is now complete in West Hollywood. Terra-Petra Waterproofing was called in to provide building waterproofing inspection services prior to final close of project.

Located at 7141 Santa Monica Boulevard, just east of La Brea Avenue, the property features a seven-story building containing 166 apartments atop 9,000 square feet of ground-floor commercial space.  The newly opened mix of studio, one- and two-bedroom apartments.

Architecture firm Studio One Eleven designed Domain, which features a three-story opening along Santa Monica Boulevard.  Building heights gradually step down as the property approaches the lower-scale residential neighborhood to the north, creating space for outdoor decks.  Other amenities are located within a central courtyard, including a swimming pool.

The Use of Electronic Leak Detection (ELD) on Waterproofing Membranes over Concrete Surfaces

Waterproofing membranes are a key element in building enclosure systems—a key element that ultimately gets covered up by a variety of finish materials including landscaping, green roofs, topping slabs, pavers and so on. As most of us know, excavation to expose a failed waterproofing membrane for repairs can be prohibitively expensive and in some cases impossible. For this reason, many designers are choosing to specify integrity testing to verify that the waterproofing membrane is free of discontinuities and penetrations through the membrane prior to the installation being permanently covered. When integrity testing is not specified, many contractors are often performing this type of testing voluntarily to avoid future problems or “call-backs.”

The most common integrity testing method is the flood test. Flood testing is typically performed by flooding waterproofed horizontal surfaces with at least two inches (50 mm) of water for a period of up to 48 hours. Temporary dams are often constructed to partition the test areas, provide an up-turned plaza edge and control the depth of the flood testing. During the flood test, access to the underside of the flooded areas is necessary for a visual inspection of water leakage. However, in the case of a membrane failure (leak), flood testing indicates only where water is penetrating through the entire assembly within the test area, not the location above where water is breaching the membrane. In addition, flood testing cannot be performed on vertical surfaces or at locations where the underside of the slab is not accessible.

The aforementioned restrictions and lack of conclusive data associated with flood testing has enabled Electronic Leak Detection (ELD) to gain momentum as a viable alternative to traditional flood testing. This article will focus on the different types of ELD and the applications where ELD is or is not well-suited.


Terra-Petra ELD information

Detec Systems Training for the Terra-Petra Team

Certified ELD Field Testing Crew, from left to right: Diego Saucedo, Project Coordinator Andrew Alvarran, Anthony Avina, Alvaro Arellano, Director of Field Operations Daniel Valdez and Chad Herrick of Detect Systems.

Certified ELD Field Testing Crew, left to right: Diego Saucedo, Project Coordinator Andrew Alvarran, Anthony Avina, Alvaro Arellano, Director of Field Operations Daniel Valdez and Chad Herrick of Detect Systems.

Detec Systems visited Terra-Petra’s Los Angeles office this week to conduct a comprehensive education and training session to promote their innovative product line of leak detection technologies. Detec provides leading-edge technology in the field of electronic leak detection (ELD), by way of membrane integrity testing and scanning, and automated structure monitoring. The training session included a classroom like session followed by field training on a jobsite.


The Terra-Petra Waterproofing Division is certified to conduct ELD testing throughout Southern California for numerous types of fluid-applied waterproofing and roofing systems in compliance with ASTM 7877-14. This includes any thermoplastic roofing system, any asphalt based waterproofing, traffic coatings, hot and cold fluid applied membranes and some bentonite systems (as long as they have thermoplastic reinforcement).

Terra-Petra employs the use of the Detec Systems Roof Membrane Integrity Scanner (RMIS) to accurately identify breaches in new and existing membrane systems. Many contractors are using a 24-48 hour flood test to check for breaches in these types of waterproofing assemblies. While this method can identify water leaks, it is time consuming and less cost effective. The benefits of the RMIS technology is that breaches and other imperfections can be identified, repaired and re-tested the same day, saving valuable time, resources and money for any project.

Please contact us for a quote.

Terra-Petra Inspector Anthony Avina being trained to perform ELD Testing on vertical surface.

Terra-Petra Inspector Anthony Avina being trained to perform ELD Testing on vertical surface.


ELD Testing at penthouse pool using the Detec RIMS System

ELD Testing at penthouse pool using the Detec RMIS System

See more photos here.

Waterproofing Inspections on the Hollywood Argyle Hotel by Terra-Petra

Terra-Petra Waterproofing Division is performing the waterproofing inspections for the Hollywood Argyle Hotel project. Here's an update via – by STEVEN SHARP:

After nearly one year of construction, exterior work is in full swing for Hollywood's Argyle Hotel.

Located at 1800 N. Argyle Avenue, the project consists of a 16-story hotel featuring 220 guest rooms, restaurant space, and ancillary features such as meeting rooms, a swimming pool and a parking garage.  1800 Argyle Avenue Archive (Urbanize LA)


Mixed-use project, called Metropolis, is unprecedented for Downtown L.A.

If you travel down through the Downtown LA area on a regular basis, you have probably noticed the every-changing skyline. As an environmental engineering firm, Terra-Petra is taking part with many of these new projects. One of which is called the Metropolis (you can't miss this large mixed-use community steadily growing along the 110 freeway). The Terra-Petra Waterproofing Division is consulting on the building envelope waterproofing system for the Metropolis project and inspecting all of the waterproofing as it gets installed. 

Read more about Metropolis and other projects currently being led by Chinese developers in Downtown Los Angeles.

Screenshot 2016-08-31 at 10.19.27 PM

Terra-Petra performs subterranean waterproofing inspections for new Academy Museum project

Terra-Petra heads environmental engineering and waterproofing design, inspection and systems for the new $300-Million Academy Museum project at Wilshire and Fairfax Avenue which is slated to complete in 2018. 

June 14, 2016 for Urbanize.LA.

Even June Gloom failed to put a damper on construction at the LACMA campus on the Miracle Mile, where the Academy of Motion Picture Arts and Sciences' (AMPAS) long-awaited museum is well underway.

The $300-million undertaking, located at Wilshire Boulevard and Fairfax Avenue, will create a showcase for AMPAS' vast collection of filmmaking artifacts, including tens of thousands of still photographs, screenplays, production and costume design drawings, manuscripts and storyboards.  These assets will be displayed through a series of galleries, exhibition spaces, educational spaces and on-site theaters.

The museum, designed by the famed Italian architect Renzo Piano, will restore the May Company Wilshire department store, a Streamline Moderne structure built  in 1938.  North of the historic building, the project will add an eye-catching spherical glass structure, replacing a surface parking lot and a 1946 annex to the department store.

Completion of the Academy Museum is expected in Spring 2018.

Wilshire Grand Tower Topped Off March 2016 – Video Recap

Wilshire Grand Center is a 335-meter (1,099 ft) skyscraper under construction in the Financial District of Downtown Los Angeles, California. The tower will become the tallest building in Los Angeles, the tallest structure and the second tallest building west of the Mississippi River upon completion. The building will be part of a mixed-use hotel, retail, observation decks, shopping malls and office complex, expected to revitalize downtown Los Angeles and the area surrounding the building. The development of the complex is estimated to cost $1 billion. The plans currently include 67,000 square feet (6,225 m2) of retail, 677,000 square feet (62,895 m2) of Class A office space and 900 hotel rooms. InterContinental is the tower's hotel component, comprising 900 rooms and suites occupying the 38th to the 70th floors. Estimated date of completion March 8, 2017. Terra-Petra is proud to have been a part of this project during initial record concrete pour. 

1 2