How altering the way we specify reinforcements can yield insanely better results.
THE ADDITION OF A FEW KEY WORDS TO THE SPECIFICATION, LIKE “COMPOSITE,” “WOVEN MAT,” OR “SCRIM REINFORCEMENT,” CAN IMPROVE THE LONGEVITY AND PERFORMANCE LEVEL OF THE ROOF SYSTEM BY 20-40% BEYOND THE ASTM STANDARDS.
Specifying types of polymer modified bitumen (MB) membrane reinforcement can play a large role in the performance and life of a roof system. There are multiple factors to consider before specifying a type of roof membrane, such as geographical location. In Texas, we have extreme heat and hurricane force winds which can shorten the lifespan of the roof. The addition of a few keywords to the specification, like “composite,” “woven mat,” or “scrim reinforcement,” can improve the longevity and performance level of the roof system by 20-40% beyond the ASTM standards. The American Society for Testing and Materials (ASTM) is the organization that sets the standards to define the specific types of reinforcement materials. ASTM’s standards should be viewed as having the minimal code requirements for construction. These standards create a foundation for the roof system but don’t provide the upgrades that can provide enhanced durability and or extended life cycle expectancy. ASTM relies on qualified members from around the world to develop the standards, but the organization does not have an in-house testing facility or technical research center for material testing, so it uses accredited facilities like the Z6 Commissioning laboratory to help develop them. These standards provide dimensional tolerances, physical properties, performance requirements and material appearance requirements.
The MB roof system standards are drafted and reviewed by industry professionals and manufacturer’s representatives for approval, then published if a two-thirds consensus is achieved. There are five typical ASTM standards used to define the structural performance characteristics of a styrene butadiene styrene (SBS) or atactic polypropylene (APP) MB membrane. There are three commonly used polymer modified roofing material standards for SBS by ASTM. These standards define reinforcement types using glass fiber (ASTM 6163), polyester (ASTM 6164), or combination (ASTM 6162). There are two standards which define reinforcements for APP polyester (ASTM 6222) or a combination of polyester and glass fiber (ASTM 6223). These standards are further defined with type classifications I, II, and III, differentiated by increasing weights and area of sheet per unit. The grade of the unit is distinguished with a granule-surface (G) or smooth surfaced (S) materials. An example of ASTM D6162, Type I or II, Grade S in the specification reads, “Standard Specification for Styrene Butadiene Styrene (SBS) Modified Bituminous Sheet Materials Using a Combination of Polyester and Glass Fiber Reinforcements.” There are no additional distinctions defined in these standards to specify a type of fabric used for reinforcements.
The words scrim or non-woven (i.e. mat) are left out of the standards. SBS is a plastomer with elasticity characteristics that have consistent properties throughout a wide temperature range. The SBS will stay flexible even in cold temperatures below 32° F. SBS has a melting point of 210° F which allows a variety of application methods. SBS membranes can be cold applied, hot mopped, or propane torch applied. APP MBs tend to be stronger and stiffer and will provide greater resistance to high temperatures. APP MBs are typically only applied via propane torching with a melting point of 300°F or through cold applied polymer-modified adhesives. Specifying a scrim or composite in either APP or SBS will lead to a superior product line for just about any manufacturer.
The performance criteria to consider when choosing a membrane combination are watertight laps, blister resistance, resistance to splitting, delamination resistance, shrinkage resistance, and durability. Reinforcing materials of the MBs will serve as the carrier for the polymers and will work as a structural element to bridge substrate joints. The combinations of materials will then increase tensile strength, puncture resistance, and provide increased fire protection.
There are two main types of reinforcement fabrics – scrims and fabric mats. Scrims are fabrics woven together in both machine and cross machine directions and are used in high-performance membranes, providing a greater tensile and tear strength than minimum ASTM standards. Fabric mats are non-woven (unless specified as “woven mat”) comprised of randomly distributed fibers which are dependent on binders achieved through chemical adhesives, thermally, or mechanically. They typically have an overlapping arrangement and have less resistance to tensile and tear strength. Composites or laminates include both scrim and mats which are chemically or mechanically bonded. Composites will typically combine characteristics for superior tensile strength and puncture resistance. Glass fibers are more dimensionally stable and more heat resistant than polyester fibers. Glass fibers will not break down with ultraviolet (UV) exposure but polyester will. Polyester, however, has greater resistance to puncture, strain energy, and flexibility. Since polyester and fiberglass are complementary, the best approach is a two-ply membrane minimum incorporating both materials.
The placement and type of reinforcements can have a significant effect on the weathering characteristics of the finished roof membranes. Studies* have shown that the use of polyester mats, due to their dimensional instability, in cap membrane of both APP and SBS can accelerate the natural weathering causing cracking and crazing, which is a network of fine cracks on the surface of the material. The best-performing systems have an inner ply and cap membranes to incorporate both a scrim and a mat. Failures can occur with systems using only scrims due to excessive dimensional instability which can lead to failures with the membrane splitting. The use of only nonwoven mats can cause a less dimensionally stable reinforcement that can eventually result in stress to the seams due to shrinkage.
In the harsh environment of the Texas coastal region, there is little room to accept only the minimum criteria where every manufacturer meets the benchmark. Relying only on the standards can be shortsighted which tends to damage the health of the modified bitumen industry. This is evident due to the fact that so many roof systems are compromised by water infiltration, cutting their lifespans short before the warranty is over. Referencing reinforcement fabric type combinations in the specifications can provide a healthy boost in performance and durability for the roof system. *Source: Baxter, Richard and Tim Keamney, “Weathering
Happy Friday! The Zero/Six Consulting team a great time at our company outing on the water before the mid-year meeting last week. Wish we were on a boat right now! #Weekendvibes #Teambuilding #Workperk ... See MoreSee Less
It's not often that the entire Zero/Six team is together in one room. But when we are, it's a lot of fun! Last week, we had our mid-year meeting to celebrate, recognize and reflect on current company efforts and the accomplishments of our amazing team members! We even witnessed history as our “Song of the Day” John Wayne trophy holder, Brandon McDermott, passed his long-held title to Zack Johnson. The future looks bright at Zero/Six! #Growth #ProudtobeZ6 ... See MoreSee Less
Site visit! Our senior field specialists were on-site to conduct quality control inspections for the addition to Wisenbaker Engineering Building, part of Texas A&M University’s new Engineering Quad. This addition supports the guiding principles of Dwight Look College of Engineering's 25 by 25 initiative to enhance students’ educational experience and respond to the workforce needs of the industry. The program is designed to increase access for qualified students to pursue engineering education and grow the University’s total enrollment to 25,000 students by 2025. Zero/Six’s scope of work encompass a variety of envelope services throughout the design, construction and commissioning phases, including peer reviews, submittal reviews, QA/QC inspections throughout the construction of the building envelope, and performance testing of fenestrations and roofing systems. #WeKeeptheOutsideOut #BuildingfortheFuture ... See MoreSee Less
While performing a punch walk out on Trinity roof at Baptist Hospitals of Southeast Texas, WHCI field specialists happen to stumble across a guitar and mic fabbed out of some EPDM. WHCI are on-site to oversee the remediation of the existing roof to resist wind uplift pressures while ensuring minimal impact to the occupied hospital facility should another windstorm event occur. #HappyFriday ... See MoreSee Less
Site visit! Associate Principal Daniel Hodge was on-site to conduct a preliminary review of the exterior mock-up at Hedwig Place, a 102,474-square-foot, five-story, Class A medical office building located in Hedwig Village, an affluent, independent municipality of Houston’s booming west side. Developed by Stream Realty Partners and AMD Global, Hedwig Place is situated on two acres in the heart of Memorial Villages, three miles from Memorial Hermann Memorial City Medical Center and within minutes of Houston’s popular Uptown District. The development broke ground 65 percent preleased with anchor tenants Memorial Plastic Surgery and Texas Ear, Nose and Throat Specialists. #ReviewEarly #WeKeeptheOutsideOut #MinimizeRisk #CommitmentToQuality ... See MoreSee Less
Our strategic partner Coltzer Company just launched their brand new website today. Check it out - www.coltzercompany.com/! Now, when our clients ask, “Can you build it?” We have the answer. Coltzer Company, LLC is a throw-back to the original Coltzer family construction business started by Louis Oliver in 1953. At that time it was The Oliver Company, Inc and by the early 1960’s it employed a carpenter, soon to be foreman, then estimator, then vice president, then owner…W.H Coltzer, Sr. #oldschool #ConstructionManagement #WeCanBuildIt ... See MoreSee Less
"Hanging around with Tim Rogan (Houston Lath and Plaster) and Chad Dupree (Diversified Plastering) the last couple of years has definitely increased my awareness with regard to the more technical aspects of lath and stucco." ... See MoreSee Less
My Tenure as A Stucco Nerd - Hanging around with Tim Rogan (Houston Lath and Plaster) and Chad Dupree (Diversified Plastering) the last couple of years has definitely increased my awareness with regar...
The team enjoyed getting to connect with other small business contractors and subcontractors across the U.S. to learn more about the Galveston District, U.S. Army Corps of Engineers's upcoming projects for 2019 at their annual Industry Day event. Thank you to the district’s staff for the in-depth overview of 2019 initiatives and insight into the contracting process. #Networking #SmallBusiness #Galveston #USACE ... See MoreSee Less
Project Spotlight: Baptist Hospitals of Southeast Texas (BHSET) Disaster Recovery
Within days of Hurricane Harvey making landfall, Zero/Six was on-site to begin evaluating 16 buildings across all three of BHSET’s Beaumont, Orange, and Silsbee campuses. During our post-disaster building assessments, the hospital system was not in operation, having to evacuate almost 200 patients after the local water supply failed because of flooding from the hurricane. Read more - bit.ly/2K6ZLCe... See MoreSee Less
Baptist Hospitals of Southeast Texas (BHSET) are community-owned, not-for-profit facilities located in an area known as the golden triangle of East Texas (Beaumont, Port Arthur, and Orange). BHSET fac...
Check out the article, "Stucco Control Joint Research Project" by our Strategic Partner Tim Rogan in Walls & Ceilings Magazine. Read more - lnkd.in/gvQNaG8? #continuingeducation #research ... See MoreSee Less
It seems perplexing that since the control joint was invented by Raymond Clark in 1955, there have never been large-scale tests of the function and movement when subjected to shrinkage or thermal vari...
The results are in for our long-term study of a 1200-square-foot stucco mock-up in Galveston, TX. The purpose of study was to document the differences in performance of stucco systems where the lath was cut behind control joints vs. continuous lath. In the report, we share our process of discovery and how theories were verified and myths dispelled after conducting extensive performance testing that could likely impact future codes related to stucco installation. Thank you to our partners Tim Rogan, Z6 Commissioning, LLC, and Chad Dupee. Check out the results here - lnkd.in/erf4Y-A. #PerformanceAssurance #LaboratoryTesting #StuccoInstallation ... See MoreSee Less
Many interesting and important building envelope issues were discussed in the educational seminars at the recent RCI, Inc. International Convention and Trade Show in Houston this March. We were especially inspired by the presentation on roof drainage design, roof collapses, and the related codes. Check out our article, “Lessons Learned at RCI: Roofing Instability” by Jef Tay Bishop, P.E. regarding these issues and how they prove especially relevant for consultants. Read more - bit.ly/2M0aDQq #ContinuingEducation #EnvelopeArchitecture #RoofDesign #BuildingCodes ... See MoreSee Less
Lessons Learned at RCI: Ponding Instability - Many interesting and important building envelope issues were discussed in the educational seminars at the recent RCI International Convention and Trade Sh...
In this issue: A Message from Our CEO: Celebrating 15 Years At-A-Glance: A Snapshot of Zero/Six Projects Lessons Learned at RCI: Ponding Instability Disaster Recovery: Baptist Hospitals of Southeast Texas Out & About: On the Move with the Zero/Six Team Zero/Six Employment Opportunities ... See MoreSee Less
Congratulations to our affiliate company WH Coltzer International (WHCI) for being chosen as the project management firm for disaster recovery services at Baptist Hospitals of Southeast Texas (BHSET). WHCI has been awarded a three-year, single-award IDIQ contract to provide program management services for planning, design and construction of 16 buildings across all three of BHSET’s Beaumont, Orange, and Silsbee campuses. #doingsacredworkeveryday #wecanbuildit ... See MoreSee Less
An option for some of you land lovers!Zero/Six Consulting is seeking an experienced North Houston Team Leader for our new Woodlands Area office. The successful candidate will be responsible for project oversight, including on-site inspections, resolving technical issues, client management, and client deliverables. We offer competitive pay, benefits, team building activities, continued education and more! Apply here: bit.ly/2m9xufO... See MoreSee Less
Zero/Six Consulting is seeking an experienced North Houston Team Leader for our new Woodlands Area office. The successful candidate will be responsible for project oversight, including on-site inspections, resolving technical issues, client management, and client deliverables. We offer competitive pay, benefits, team building activities, continued education and more! Apply here: bit.ly/2m9xufO... See MoreSee Less
Site Visit! The Zero/Six crew is on-site to perform a complete forensic study and assessment of all existing roof sections on UTSA - The University of Texas at San Antonio's Applied Engineering and Technology (AET) Building to determine the source of reported water infiltration. The investigation includes a roof inspection as well as diagnostic water testing per AAMA 501.2. The four-story, 145,440-square-foot building was designed to support world-class research and teaching in science and engineering and includes 87 faculty offices, 36 laboratories, five classrooms and collaborative study areas. #WeKeeptheOutsideOut #RoofAssessment #EnvelopeArchitecture ... See MoreSee Less
Site visit! The crew was on-site at the Texas A&M University Galveston Campus Academic Building Phase Two project to observe water infiltration testing (ASTM E1105) conducted by Z6 Commissioning, LLC to validate compliance with project specifications. The two-story, 38,000-square-foot building will provide a striking addition to the entrance of the campus and support and enhance student learning experiences with a large multipurpose space, smaller seminar rooms, business center and campus bookstore. Zero/Six’s scope of work encompass a variety of envelope services throughout the design, construction and commissioning phases, including drawing review at three stages, submittal review, QA/QC inspections throughout the construction of the building envelope, and performance testing of fenestrations and roofing systems. #WeKeeptheOutsideOut #EnvelopeArchitecture ... See MoreSee Less
Zero/Six is still hiring across the state of Texas and beyond. We are a small, family focused company that is blessed with great projects for even better clients. If you are one of the BEST Architects...
Zero/Six is still hiring across the state of Texas and beyond. We are a small, family focused company that is blessed with great projects for even better clients. If you are one of the BEST Architects, Engineers, Energy Specialists, Envelope Consultants, or Project Managers consider joining our family! ... See MoreSee Less
We had a great time getting to connect with other small business contractors and subcontractors across Houston yesterday to learn more about Port Houston's upcoming construction and design capital improvement projects. Thank you to Director of Project & Construction Management Roger Hoh, P.E. for the in-depth overview of 2018 infrastructure initiatives. #PortHOU #smallbiz #projectmanagement ... See MoreSee Less
We’re hiring! Zero/Six is seeking experienced Building Envelope Consultants for regions throughout Texas to work on unique projects in a wide variety of markets from design through project completion. Our consultants will be responsible for projects which will include an on-site presence, resolving technical issues, client management, and client deliverables. Zero/Six’s consultants are not only self-starters, but team players who also mentor junior staff. Read about our latest job opening here - bit.ly/2m9xufO #TeamZ6 #EnvelopeArchitecture #WeKeeptheOutsideOut ... See MoreSee Less