Terra-Petra Lunch & Learn on Principles of Building Enclosure Systems for Gruen Associates

Terra-Petra’s Forensic Waterproofing Expert, Barry Taheri, recently presented his ninth lunch and learn program for global architecture, planning and design firm, Gruen Associates, at their Los Angeles offices at 6330 San Vicente Boulevard on October 17, 2018.

In his presentation, “The Principles of Building Enclosure Systems,” Taheri provided info on the importance of building waterproofing and the benefits of investing in mock-ups, along with a few live demonstrations. Lunch for the group was catered and thoroughly enjoyed by the group of 47.

Barry engaged the crowd as usual with his informed and expert presentation. A copy of his presentation was sent to Debra Gerod for their reference library at the request of many attendees. Special thanks to Wynord Thomas and Zohar Sorek for their partnership to organize this event.

Lunch for the group was once again catered by Mendocino Farms.

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

Highlights from the Gruen Associates Lunch & Learn on Principles of Building Enclosure Systems…

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CONTACT RCI JOIN RCI SEARCH EMPLOYMENT ADS SEARCH TECHNICAL ARTICLES MEMBER LOG IN RCI, Inc. RCI, Inc. is an international association of building envelope consultants. Members specialize in design, investigation, repair, and management of roofing, exterior wall, and waterproofing systems. RCI, Inc. is an international association of building envelope consultants. Members specialize in design, investigation, repair, and management of roofing, exterior wall, and waterproofing systems. MEMBERSHIP Become a Member Membership Categories and Rates Member Benefits, Programs, and Services Member Resources/Downloads PROFESSIONAL REGISTRATIONS Registered Roof Consultant – RRC® Registered Roof Observers – RRO® Registered Waterproofing Consultant – RWC® Registered Exterior Wall Consultant – REWC® Registered Exterior Wall Observer – REWO® Registered Building Envelope Consultant – RBEC® EDUCATION Educational Event Calendar 2019 RCI International Convention & Trade Show Education | Speakers Trade Show Info. Sponsors | Exhibitors Hotel and Accommodations 2018 RCI Building Envelope Technology Symposium Register to Attend Education | Speakers Sponsors/Exhibitors Schedule of Events Hotel Accommodations Building Envelope Educational Programs e-Learning Programs 2018 Canadian Building Envelope Technology Symposium- Legacy Site Register to Attend Education | Speakers Sponsors/Exhibitors Schedule of Events Hotel and Accommodations PUBLICATIONS RCI Interface, Technical Journal RCI Interface – Digital Edition RCI Manual of Practice Publications Marketplace Technical Articles Library NEWS/ADVOCACY RCI News Posts RCI In the Media Media Partners Position Statements Technical Advisories Member Self-Advocacy Tools ABOUT RCI RCI Members’ Services RCI Members’ Ethics Code Board of Directors Chapters and Regions Committees Association Staff Privacy Policy Frequently Asked Questions FIND A MEMBER You are here: Home / Education / RCI, Inc. – 2018 Building Envelope Technology Symposium RCI, Inc. – 2018 Building Envelope Technology Symposium

Terra-Petra Waterproofing Divison to Sponsor 2018 Building Envelope Technology Symposium

The Terra-Petra Waterproofing Division is proud to sponosor, and have its executive team on hand (Barry Taheri, Josh Heidt, Dan Valdez and Justin Conaway)  at the  2018 RCI, Inc. Building Envelope Technology Symposium on  November 16-17, 2018  (Friday and Saturday) at the Gaylord Opryland Resort and Convention Center in Nashville, Tennesse.

The Symposium on Building Envelope Technology is a two-day educational program offering cutting-edge information regarding design, construction, maintenance and repair of modern and/or older building envelopes. The event’s open, inclusive environment encourages attendees to ask questions and stimulates dialogue. Speakers offer relevant solutions by referencing real-world examples and specific case histories.

Each registrant will receive a comprehensive proceedings detailing program information. Breakfast, lunch and breaks will be catered daily. There will be an informal social reception the first evening.

RCI’s expert instructors offer more than just technical data. Presenters reinforce program content with practical examples from applications in the field. With plenty of opportunities to ask questions, you get the answers you need. Instructor/attendee dialogue is encouraged.

Geared towards building envelope professionals, architects, engineers, contractors, and facility managers, this program is invaluable to anyone involved with maintaining or designing building envelope systems.

rci-aia-logos-vert12.0 Continuing Educational Hours from RCI, Inc. – Attendees earn up to 12 Continuing Educational Hours (CEHs) from RCI.

12.0 Learning Units and Health Safety Welfare (HSW) Credit from AIA – Members of the American Institute of Architects (AIA) earn up to 12 Learning Units (LUs) reported directly to AIA.

Those interested in arranging a meeting with Terra-Petra Waterproofing Division team while at the Symposium, can do so by contacting Justin Conaway at the Terra-Petra Main Office in Los Angeles at 213.458.0494 or by emailing Justin directly.

Lunch & Learn Program on Principles of Building Enclosure Systems for Lorcan O’Herlihy

Terra-Petra’s Forensic Waterproofing Expert,   Barry Taheri,   presented his eighth Lunch and Learn program for global architecture, planning and design firm,   Lorcan O’Herlihy Arhcitects,  October 10, 2018, at their spacious Los Angeles office on 4106 Adams Boulevard.

In his presentation, “The Principles of Building Enclosure Systems,” Taheri provided info on the importance of building waterproofing and the benefits of investing in mock-ups, along with a few live demonstrations. Lunch for the group was once again catered by Mendocino Farms.

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

 

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Terra-Petra’s Blindside Waterproofing Project featured in Waterproof! Magazine

Terra-Petra Building Waterproofing Division Project Featured on the Cover of Waterproof Magazine, Fall 2018

BLINDSIDE IN HOLLYWOOD

THE FOUNDATION FOR THIS 118-UNIT APARTMENT COMPLEX EXTENDS THREE STORIES BELOW GRADE AND SPANS AN ACTIVE FAULT LINE.  GEOFOAM AND BLINDSIDE WATERPROOFING ENSURES IT STAYS DRY.

Blindside waterproofing systems are among the most difficult to design and install.  These waterproofing and drainage systems are placed before the structural walls are poured, which means they must be installed over a soil retention system rather than concrete or masonry.  That retention system—whether it be lagging beams, sheet pilings, shotcrete, or compacted native soils—is typically rough, uneven, and subsequently requires extensive detailing.

Additionally, blindside applications are usually part of massive projects that extend far below a water table where, in some cases, hydrostatic pressure can be extreme. Here, the workmanship must be flawless, as once the structural wall is in place, it is extremely difficult to repair any leaks that develop.

While blindside waterproofing is a considerably more complex below-grade solution, sometimes it’s the easiest—or only—way to get the job done: Applications of this waterproofing methodology can be found in bored tunnels and deep foundations where over-excavation isn’t possible, for example. Blindside techniques are also optimal when property lines and/or nearby structures limit excavation and access, such as “zero lot line” foundation walls.

This was the case at 1840 N. Highland Ave., a luxury multifamily complex constructed in the heart of Hollywood, California, steps away from the world-famous Hollywood Bowl and Hollywood Boulevard.  Typical of many projects in high-density, built-up areas, the 118-unit complex is sited on a tight lot, and extends three stories below grade to create space for mechanical systems and tenant parking; an ideal scenario for blindside waterproofing techniques.

As the schedule moved forward, it transpired that there were several unique complexities, which made the project even more challenging.

The entire lot was excavated to more than 30 feet below grade, with soldier piles, wood lagging, and rock bolts used to keep the surrounding soil in place.

“There were some real twists to the project, including two fault lines under the cantilever of the building and the water table, which sat at different levels,” says Josh Heidt, with Terra-Petra, the company contracted to provide waterproofing consulting services.

Terra-Petra brought in Epro Services, a Kansas-based waterproofing company with a long history of success on blindside jobs in the state, to provide a solution. Heidt says, “Epro has the kind of case history we were looking for from a manufacturer on a multi-faceted project like this.”

Construction began with a major earthmoving project.  The entire 8,144-square-foot lot was excavated to more than 30 feet below grade.  Soldier piles and wood lagging were used as a retention system, augmented by tiebacks and soil nails. On one wall, massive tubular steel rakers—more than three feet in diameter—were used to ensure that the foundation of the adjacent seven-story building stayed in place.

To ensure optimal waterproofing, the system had to seal tight despite the irregular substrate and needed to be durable, too. The structural walls would be placed with shotcrete, which would be applied directly to the membrane without a protection course.

The underslab barrier extends up the wall two feet higher than the water table. The mat of reinforcing steel will be encapsulated in the four-foot-thick foundation

The architect worked closely with the geotechnical consultant and the waterproofing supplier to ensure the specified system would perform as designed.  Architect Ronald Rosell, representing the project architect Arquitectonica, says “Epro helped us and the geotechnical consultant work through the issue regarding the north face of the building where the fault line divided the water table.”  He continues, “The fault acted like a subterranean waterfall, and Epro gave us recommendations for how best to prevent that hydrostatic pressure and constant flow of water from impacting the structure.”

The general contractor, Frymer Construction, was also brought into these discussions to ensure the design would be buildable.  “We collaborated with Terra-Petra regarding the usual qualifications, review of transitions, and fastening and drainage considerations,” says David Frymer, company president.

The bottom of the excavation was about 10 feet below the water table, so crews poured a “mud slab,” then installed the underslab waterproofing system:  Epro’s E.Protect+ Underslab, which features built-in layers of redundancy.  It’s achieved by combining different types of waterproofing materials to leverage the positive attributes of each, a technique they call “Redundant Field-Installed Composite Design.”

Tubular steel rakers more than three feet in diameter provide support for the lagging and simplify the detailing.

In this particular application, E.Protect+ Underslab was comprised of a layer of 16-mil HDPE thermoplastic membrane with heat-welded seams, over which the team spray-applied a 100-mil layer of polymer modified asphaltic membrane.  Finally, this was topped with an HDPE-reinforced bentonite sheet which will expand to seal any leaks that may develop in the future.

This triple system was installed across the slab and up the walls two feet higher than the historic high water table level.   Then the structural slab was poured, four feet thick with a double mat of reinforcing steel running 12 inches on center in both directions.

Above the water table, Arquitec-tonica specified E.Proformance Shoring, a blindside waterproofing system used for non-hydrostatic conditions. It’s comprised of a 30-mil HDPE dimpled drain mat installed against the lagging, which was then sprayed with a 60-mil layer of the same asphaltic membrane used in the underslab waterproofing.

The spray-applied coating is formulated so that the heat generated by curing concrete will chemically bond the product directly to the structural wall. The dimples in the drain mat also help prevent delamination between the membrane and the concrete.

E.Proformance was used all the way up to grade level, where it was transitioned to a hot rubber horizontal waterproofing system that was used to seal beneath the planters and the above-grade stucco wall system.

In total, the project used 70,000 sq. ft. of waterproofing.

EPS “geofoam,” reduces the effect of seismic movements on the building’s structure and create a smoother substrate for the waterproofing.

Experts say the key to quality in any blindside application is the ability to detail around the soil retention system.  This project used an ingenious solution to resolve that dilemma: A two-foot-thick layer of EPS “geofoam,” installed between the retaining wall and the shotcrete structural wall.

Provided by Insulfoam, this rigid insulation arrived in giant blocks and was installed between the retaining wall and the dimple membrane.  The geofoam will reduce the effect of seismic movements on the building’s structure and creates a smoother substrate for the waterproofing.

Crews fastened the geofoam directly to the lagging. Then the dimple drain sheet was fastened over the foam, with the waterproofing layer spray-applied to the dimple sheet. The same spray-applied product was also used to detail around the many pipe penetrations, the pits for elevators, and utilities.

“My experience with Epro has been outstanding,” says Mostafa Sobhi, president of BM Builders and the certified Epro applicator responsible for the installation. “Their quick turnaround in answering any concerns and providing details due to changing field conditions has been a huge factor on how jobs like this can be successful, while also maintaining schedules.”

Heidt reports that Epro representatives were “on the site a great deal of the time” to ensure the workmanship was flawless. Despite the high level of complexity and the presence of hydrostatic conditions, working closely with the project team enabled Epro to provide a 15-year no-dollar-limit warranty to the developer.

The project at 1840 N. Highland Ave. is scheduled for completion in 2019.

The 1840 N. Highland Ave. apartments are on schedule to be completed in 2019.  The development shows that despite the difficulties blindside work presents, with the right materials and know-how, contractors can get excellent results.

Terra-Petra’s Forensic Wateproofing Expert Delivers Successful Lunch & Learn Program for SOM Los Angeles

Terra-Petra’s Forensic Waterproofing Expert,   Barry Taheri,   presented his sixth lunch and learn program for global architecture, planning and design firm,   Skidmore, Owings and Merrill (SOM),   at their downtown Los Angeles offices on Grand Avenue, on August 29, 2018.

In his presentation, “The Principles of Building Enclosure Systems,” Taheri provided info on the importance of building waterproofing and the benefits of investing in mock-ups, along with a few live demonstrations. Our delicious lunch was catered by Mendocino Farms.

Terra-Petra’s presenter Barry Taheri was more than happy to stay after the presentation to field questions from many of the audience members. We want to thank SOM for their time as we were very impressed with this world-class firm and hope to be able to work with them on projects in the near future.

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

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Observing bentonite waterproofing system installation for high rise development in DTLA.

Observing a Bentonite Waterproofing System Installation in DTLA

Building waterproofing systems should always be inspected by a certified professional. As a part of their waterproofing warranty program, most waterproofing systems manufacturers now require a certified independent inspection, but it is also important to provide assurances to the architects and developers that the systems will work properly. Terra-Petra’s Waterproofing Division has a team of highly trained inspectors on staff who hold certifications from several of the major waterproofing manufacturers in the market today.

Check out the process of a new Downtown Los Angeles bentonite waterproofing system installation and read more about Terra-Petra’s inspection and CQA/CQC monitoring services here.

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

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

The Terra-Petra Waterproofing Division team exhibited at the RCI International Convention & Trade Show at Houston’s George R. Brown Convention Center on March 24-27, 2018.

Our group of professionals provided information and further insight on our BUILDING ENVELOPE CONSULTING * ELECTRONIC LEAK DETECTION * CERTIFIED AIR & WATER TESTING  * INSPECTION & MONITORING services.

 

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The annual 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. 

 

 

ELD TESTING

ELD Technology vs. Traditional Flood Testing for All Waterproofing Membrane Installations

Terra-Petra employs state of the art Electronic Leak Detection (ELD) technology to detect leaks for waterproofing membranes installed at roofs, plaza decks, pools, water features, covered reservoirs and other waterproofing applications in accordance with ASTM D7877-14. The ELD testing can be used in lieu of, or in concert with traditional flood testing. Flood testing, historically speaking, is more expensive, time consuming and provides for less accuracy and assurance than the ELD system. Terra-Petra’s ELD technology uses a minimum of water and time and provides absolute confirmation that a membrane is watertight. This system can be used on horizontal and vertical surfaces and can also locate hard to find leaks in older membranes.

IntegriScan electronic testing ensures that the waterproof membrane on your roof, green roof or plaza deck is dry and water-tight. Watch the latest video from Detec Systems:

How ELD testing works (with Detec’s TrueGround Conductive Primer)

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