Lunch And Learn With The Henry Company – Building Envelope Systems

Lunch & Learn With The Henry Company

Residential And Light Commercial Building Envelope Systems

The Henry Company’s Architectural Building Envelope Manager, Lynae Schindler, recently presented a lunch and learn program to our waterproofing team at our downtown Los Angeles office on Flower St. on August 4, 2022. In attendance were Terra-Petra’s Vice-President, Justin Conaway; Principal Waterproofing Consultant, Paul Piscoran; Dan Valdez Director of Field Operations; and most of Terra-Petra’s field inspection team.

In her presentation, Lynae discussed residential and light commercial building envelope systems in respect to weather resistive barriers tied to envelope fenestration systems. Our team was introduced to some innovative products for Mixed-Use, Multi-family (light commercial projects 7 stories and below), and introduced to the idea that one manufacturer should “own the wall”.

Terra-Petra Waterproofing Consulting Joins in LA Development Project Milestone Celebration

Terra-Petra Building Envelope Waterproofing Consulting Division Joins in on 1375 S. St Andrews Place Development Project Milestone Celebration

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Terra-Petra’s Building Envelope Waterproofing Consulting Division was proud to be a part of the Holland Partner Group (HPG) “Topping Out Celebration” on May 19th. HPG organized this special event to recognize a great milestone in the construction process of its new development at 1375 S. St Andrews Place in Los Angeles, California. The project consists of the construction of a new 185 unit 8-story residential structure having 1 level of subterranean parking constructed adjacent to a 1 and 2-story existing theater.

As a premier developer of core urban infill residential and mixed-use trophy communities, HPG wanted to recognize this milestone as well as express gratitude to all the people and organizations that had a hand in the project reaching this stage.

We are very pleased to have played a role in the 1375 S. St Andrews Place development and look forward to providing Holland Partner Group with more support for their upcoming projects.

Terra-Petra Provided Building Envelope Waterproofing Consulting

Terra-Petra is pleased to have contributed to this project in our little way. During the design phase, we served as the project’s building envelope waterproofing consultant. We were also retained through the Construction Administration phase by reviewing and responding to RFI’s and submittals as well as carrying out the inspections of the installed systems to ensure compliance with specifications, application requirements, and warranty compliance.  

Recently we have been onsite witnessing mock-up installations of the window assemblies. More specifically we have been verifying that the building envelope systems are properly detailed and terminated per plans and specifications to ensure the watertight integrity of the system is achieved. 

We are scheduled to conduct water penetration resistance testing of the installed fenestration systems once the installation goes into production in early May.  Terra-Petra routinely performs QA/QC testing for numerous fenestration assemblies using methods ASTM E 1105 @Ambient Pressure or with a Vacuum Chamber and/or AAMA 501.2. 

Water Penetration Resistance Testing – Marina Del Rey, CA

Water Penetration Resistance Testing - Marina Del Rey, CA

Terra-Petra Waterproofing Division was recently engaged to provide Water Penetration Resistance Testing for a building located in Marina Del Rey, CA.

Testing is covering select areas across the entire building enclosure systems including the windows, storefront, curtain wall systems and roof systems The request for the testing was driven by the proposed tenant of the building. The developer engaged Terra-Petra based on our experience, reputation, and familiarity with the buildings.

The scope of work includes performing ASTM E1105-08 Modified, and/or AAMA 501.2 Modified. Our services covered industry standards for Testing and Reporting as specified in standard Specification Sections relative to these systems.

We are also providing technical consulting services to be carried out by Terra-Petra’s Principal Waterproofing Consultant to assess root causes for water intrusion that occurred at the building interior during the water testing efforts. We are currently writing up our recommendations for repairs in the few areas where water did migrate through the building enclosure systems.

Photos Of The Water Penetration Resistance Testing Project

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More About Our Certified Air & Water Testing Services

Exterior Building Envelope Water and Air Testing per ASTM & AAMA Standards:

Terra-Petra utilizes the latest technology, materials and techniques for conducting site inspections and field testing of fenestration system assemblies. We are an AAMA accredited test agency that is able to carry out air and water performance testing of building envelope assemblies during both the mock-up and installation phases. Terra-Petra provides field testing in compliance with ASTM E-1105-00, ASTM E-783-02 and AAMA 502 standards.

Forensic Waterproofing Assessment – Palmdale, CA

Terra-Petra Waterproofing Division conducted a forensic waterproofing assessment of historic water intrusion issues at the Palmdale Water District Headquarters Office building located in Palmdale, CA.

Multiple areas of historic moisture intrusion throughout this structure indicated failures at the stucco panels. The PWD Main Office was originally built in 1992 and over the years the existing stucco panels pulled apart from the building creating a safety issue. There are several theories as to why the stucco panels separated from the structure, and we assumed that it was poorly constructed. The District sought an expert to provide an evaluation of material options to replace the existing exterior stucco wall system.

Building Envelope Weatherproofing Consulting – Palm Springs, CA

Terra-Petra Waterproofing Division has accepted the task to provide building envelope weatherproofing consulting services for the design of a high-end mixed used building in Palm Springs.  The new development will consist of the construction of a 6-story building, w/ roof deck, having 45-units. There will be a single subterranean parking level.

The scope of work includes consulting on the waterproofing systems by providing both a systems recommendation letter (Basis of Design) and by redlining the project plans relative to the building enclosure system for the Construction Document (CD) phase of the project.

Terra-Petra will coordinate the waterproofing design documents with the Developer, Architect and other consultant disciplines, which typically includes structural drawings, civil plans, landscaping plans, shoring plans, MEP and geotechnical reports.

Forensic Waterproofing Assessment Of Historic Building On USC Campus

Terra-Petra Environmental Engineering is pleased to have been contracted to conduct a forensic waterproofing assessment of historic water intrusion issues for a building located on the campus of University of Southern California (USC).

We have been informed that there are multiple areas of historic moisture intrusion along the basement wall below areas of proposed pathway improvements at the site. The entire side of the basement has cracks on the wall that need repair; water proofing issues, and many utility penetrations with large cracks will need to be addressed. Terra-Petra shall assess the water intrusion issues and make recommendations to address these issues.

Paul Piscoran Principal Waterproofing Consultant

Terra-Petra Waterproofing Division Introduces Principal Waterproofing Consultant Paul Piscoran

Paul Piscoran has over 28 years of professional experience in the construction industry, with 17 years as a roofing and waterproofing consultant.

He provides technical assessments of properties and facilities to include detailed forensics investigations of enclosure systems, conducts visual and more detailed destructive testing/investigations of building exterior weatherization systems, and develops designs for enclosure systems.

Piscoran’s weatherization work has been consistently all-encompassing, involving most aspects of building envelope design, from below-grade waterproofing to rooftop flashing details.

He has certifications in construction and engineering and remains current with the technological advances in the industry through professional seminars and a variety of technical publications. An experienced expert witness, he has also served as an expert on numerous litigation cases involving water intrusion.

Read Paul Piscoran’s full bio here.

Learn more about Terra-Petra’s Waterproofing Division.

Waterproofing Concrete: Crack Size Matters, Crack Bridging Capacity

Blindside Waterproofing: Swellable Membrane Limitations: Cracks, Voids and Poor Consolidation Matter

In concrete, there are voids and cracks that waterproofing systems must compress against to be functional. This is relevant, particularly regarding poorly consolidated substrates which is inherent to shotcrete.  Swellable membranes such as Bentonite often do not achieve the 24 lbs. of compression per square foot required to achieve watertight functionality, when installed in conjunction with shotcrete.

When it comes to saving construction costs by using shotcrete at below grade vertical conditions, in lieu of cast-in-place concrete, we advise using some of those consequential savings towards a waterproofing system that can accommodate the inconsistencies inherent with blown concrete. Even the best nozzlemen cannot guarantee that voids will not be left behind.

A High-Density Polyethylene (HDPE) membrane with taped seams, used in conjunction with a bentonite option (that has the capacity of bridging in a watertight manner the poor compaction and consolidation areas that are acceptable structurally but inherently problematic from a waterproofing standpoint), is a predictable way to get watertight performance results with shotcrete applications.

Contact Terra-Petra today for a consultation on our waterproofing consulting, testing and inspection services.

Terra-Petra Building Waterproofing crew checking for leaks.

Water Testing Results: What Do Successful Projects Have in Common?

The Terra-Petra Waterproofing Division conducted water testing in Culver City that resulted in a first-time pass.

By Barry Taheri, Terra-Petra Forensic Waterproofing Consultant

Q: What does a first-time pass in water testing demonstrate?

A: It demonstrates the team can execute the detailing and workmanship of the materials required to build a watertight assembly without having to make alterations to the detailing means, methods, or materials.  Typically, we don’t see a first-time water test pass.

We congratulate our team on their success, particularly the meticulous detailing by the applicator/subcontractor. We conducted an audit of the past 30 water tests to identify the best practices that lead to a first-time pass water test versus otherwise. Our team was surprised to find the following commonality without exception.

All mockups that resulted in a first-time pass had one thing in common. The GC, subcontractor, manufacturer representative, and waterproofing consultant were present during the mockup layering and detailing. In all other cases that did not result in a first-time water test pass, the mock-ups were done in the dark without the critical parties present.

This example demonstrates clearly that the shortcut to water tightness is to follow the process of appropriate design and materials, mocked-up in place or stand-alone, with all parties present.

Terra-Petra’s Forensic Waterproofing Expert, Barry Taheri

Terra-Petra’s Forensic Waterproofing Expert, Barry Taheri

Terra-Petra’s Forensic Waterproofing Expert, Barry Taheri, recently presented his 17th lunch and learn program for architecture, planning, and conservation firm, Architectural Resources Group, on June 16, 2021.

ARG’s projects encompass some of the West Coast’s most iconic buildings and sites, such as the rehabilitation of the Alcatraz Quartermaster Warehouse in San Francisco and renovation of the Trust Building in Downtown Los Angeles.

Barry presented the material remotely (we hope to be “in person – with lunch” the next go-around!), and it was well-received! During the Q&A, Barry was asked about his experience with historic buildings. He described a current consultation at the Egyptian Theater in Los Angeles (reopening 2022), and a completed consultation at the iconic Hotel Cecil in downtown Los Angeles. Barry spoke about the patience and creativity needed to deal with the limitations presented by these historical restorations. He was also asked to forward the seminar’s section on stucco tests, to an ARG conservator, as the material was evidently relevant to the work they perform.

Special thanks to Marcos Gonzalez-Bode for organizing the event.

Contact Terra-Petra for more information on how to schedule a Lunch and Learn Program for your organization.

About Terra-Petra Forensic Waterproofing Services

Due to the emerging demands of energy, sustainability, and functionality of both residential and commercial structures, coupled with a high rate of water infiltration litigation, building science, codes, and requirements are rapidly evolving requiring builders and architects to retain expert guidance. We use our knowledge and experience from years of legal and forensic cases to bring expertise to your project and introduce a balanced and systematic approach to the entire water management system and a proper integration of all components.

Terra-Petra Waterproofing Division

The Terra-Petra Waterproofing Division strives to provide a holistic approach to Building Envelope Consulting with a focus on “making our clients’ lives easier.” We achieve this goal by responding to our clients’ needs in a timely manner and serving as their single point of contact for any services they need. This approach has allowed the Terra-Petra Waterproofing Division a very steady and organic growth from the inception of the company in 2002.

Our clients have come back to Terra-Petra, again and again, with new needs asking if we can provide more and more services than for their previous project. Fortunately for us, our customer intimacy value discipline has allowed us to continually tailor and shape our service offerings to fit the increasingly defined definition of our customers’ needs. With offices in most major metropolitan areas across the country, Terra-Petra’s Waterproofing Division has successfully worked on a variety of building waterproofing projects around the United States in a variety of climates. We can respond in a moment’s notice to any client request.

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