Contributed by Roy Schauffele
The air barrier technology used in today’s construction and mandated by the International Energy Conservation Code (IECC) are firmly grounded in science. That database of knowledge continues to grow at an astounding rate. Research efforts by the Air Barrier Association of America (ABAA) will be presented at the ABAA Conference in 2019, and you will be astounded by how much research and testing that ABAA has been conducting to ensure better knowledge for all.
Currently, air barrier systems are being marketed with having passed only the air barrier part of the testing (ASTM E2357 - Standard Test Method for Determining Air Leakage of Air Barrier Assemblies) and pay little to no attention to the other architectural performance attributes, such as crack bridging, water resistance, adhesion to a substrate and fastener sealability, which when successfully passed, results in an ABAA Evaluated Assembly.
So, what I’m asking you to consider is an upgrade of performance requirements for a better and stronger air barrier specification. Here are my suggestions for ensuring the best possible air barrier performance for your project:
Performance requirements for a proper air barrier specification are vital. The above are four of my suggestions as how you can elevate and upgrade your specs. Should you have any questions or comments, I appreciate you commenting below. Thank you for reading.
Contributed by Dean Moilanen
The finishing trades most often come into play at the end of the construction project. In many cases, the end result is decorative, ornamental, and breathes life into the vision of the finished project. The installation of ceramic tile and natural stone is a finishing trade which must deliver on an aesthetically pleasing expectation AND be a resilient, long lasting, wearing surface. Unfortunately, all too often, critical installation methods and standards are not followed, with the end result culminating in failure.
Ironically, this uptick in installation failure comes at a time when the combined forces of the tile and stone industry are proactively reaching out to offer training and certification for contractors and installers. The National Tile Contractors Association (NTCA), The Ceramic Tile Education Foundation (CTEF), and Advanced Certifications for Tile Installers (ACT) are just some of the organizations offering comprehensive education and training.
The downturn in the construction industry, which occurred during the last recession, saw a vast outflow of qualified installers from the industry. The challenge still remains to locate and train individuals to address the demands of a rebounding trade. This challenge has played a role in some of the nagging failure issues that continue to occur. These failures are based more on a lack of installer knowledge and competence, then deliberate shoddy practices.
Simply put, yes, you “really have to do that”, follow the ANSI or ASTM standard that is, if you want to steer clear of problems and failures. Listed below are just two of the concerns which need to be addressed in today’s ceramic tile and stone industry.
If there is one overwhelming area of concern when it comes to the success or failure of a tile or stone installation, it would be the adequate bonding of the tile or stone to the substrate. ANSI A108.5-2.2.2 outlines the process of achieving the coverage needed to bond tile or stone to the wall or floor substrate. Summarized, the adhesive used to bond the tile or stone must be applied uniformly and evenly to the substrate; no “rainbow arches of adhesive”, no “five spotting” or daubs of adhesive placed in irregular fashion on the substrate, serving as “targets” for bonding of tile.
Minimum coverage required (the amount of bonding agent affixed to the underside of the tile) can range from 80% in “dry” areas to 95% in wet areas. Wet area bonding has heightened concern, as any voids in the setting bed can serve to trap moisture and result in microbial growth (mold). The lack of adequate bond between the substrate and tile or stone finished surfaces is the culprit in all too many failures.
Wet area waterproofing concerns continue to plague tile and stone installations as well. Of growing concern is the need for tile and stone shower detail to withstand vapor migration, as steam/vapor (resulting from shower usage) migrates to behind the tiled shower wall. The moisture damages the interior wall details and oftentimes finds a food source that contributes to mold.
ASTM E96 Procedure E is a performance standard for waterproof membrane systems, which when called out in specifications ensures a “steam room” level of performance on the shower walls of these wet areas. Typically, the products meeting this standard are applied to the outer face of a suitable wall substrate in shower details, with the tile then bonded to the membrane. When assessing the viability of product to be used with regard to this ASTM standard, be sure to source independent third party testing for validating a product’s performance claims.
There is now language and documentation available to architects and specification writers which calls for qualified labor, and is available from the National Tile Contractors Association. Implementation of this language would aid industry efforts to improve installation quality.
Contributed by Roy F. Schauffele
This brief article is directed to architects, specifiers, and consultants. The use and evolution of air barriers is very reminiscent of the growth of single-ply roofing technology. The larger corporate manufacturers are pouring tons of money into marketing and advertising and as I’m fond of saying, “all advertising is completely true but rarely truly complete”.
All too often, architects & specifiers rely heavily on the paid for mass produced specifications or a quick internet search and then dutifully download a set of specifications. This is okay, but they may not contain all the technical or QA items that may be needed for proper air barrier design and performance.
What follows are references (suggestions) that can lead to clarity of specification interpretation, design intent, proper bidding and installation. These are not an endorsement, just references.
After I have the building’s design, function and climatic conditions defined, I include the following in my specifications:
While nothing is perfect, I’ve found the above to serve me well and I hope these items are of good use to you.
Contributed by Eric D. Lussier
Whether an emerging professional, new to your company or new to your position, personal advancement through a professional certification is a tremendous asset in more ways than one.
In the construction industry, the certifications through the Construction Specifications Institute (CSI) carry weight with many of the major players of a project – the owner, the architect, the general contractor, product representative or construction manager.
CSI’s Construction Documents Technologist (CDT) program is the prerequisite to CSI’s advanced Certifications: Certified Construction Contract Administrator (CCCA); Certified Construction Specifier (CCS) and Certified Construction Product Representative (CCPR).
Whether you are new to the construction industry or a 50 year veteran, the CDT program can and will help you with an overall building project. If you find yourself lost in a 1500 page, 32 division project manual, the CDT can help you understand where to find what you are looking for and just how that project unfolds from conception to delivery.
I can tell you first hand how much attaining the CDT has assisted me in my job. Before I started attending my CDT study group many years back, I focused mainly on Division 9 of architectural specifications, where you can find the sport flooring that I represent. Week after week of studying and learning from the (now former) Project Resource Manual, my eyes were opened to just how much broader of a scope a project is. From project conception right through to commissioning, I was able to more thoroughly understand all of the facets and parties involved.
The time has come to register for the Spring cycle of CSI certification. You can register now here. You are never alone when you work with CSI, either. Whether a member or a CDT test taker, fellow CSI members like myself are always there to help. Through blogs, Twitter, Facebook, LinkedIn, or the tried and true phone call, we’re always glad to help.
David Stutzman, CSI, CCS from Conspectus. “What was my first project after graduating college with an architectural degree? A prominent design? No, measuring and documenting 65 existing buildings at Letterkenny Army Depot; calculating energy savings; estimating construction costs; and finally writing the project specifications using the Corps of Engineers master specs.”
Liz O’Sullivan, CSI, CCS, CCCA: “There’s SO MUCH to learn – all of us in the construction industry are constantly learning (or should be). Much of this knowledge can ONLY be gained through experience, but not all of it has to be.A really good way to learn about how your documents may be interpreted by the users is to prepare for a CSI certification exam, starting with the CDT (Construction Documents Technologist) exam.” Read Liz’s blog: https://lizosullivanaia.com/
Tara Imani, CSI: “I’m also a CSI CDT; meaning I took the time 111 years ago, to understand how a good legal set of contract documents are put together and administered.So, as you can tell, I have a lot of education but it’s all because I thought it was important to broaden my understanding of this complex industry at that time in my career; I didn’t do it to add initials after my name!” Read Tara’s blog: http://www.indigoarchitect.com/
Randy Nishimura, AIA, CSI, CCS: "Passing the CDT examination means you have become fluent with construction project processes and communication. It means you’ve demonstrated professional commitment, credibility, and reliability to your employer, colleagues, and clients. Obtaining CDT status benefits you, your company, and your customers. Getting your CDT also means acquiring the privilege to add “CDT” after your name on your business card and resume." Read Randy's blog here: http://sworegonarchitect.blogspot.com/
Registration is open until Mid-March. Head over to www.csiresources.org/certification/csi-certification to sign up.
Contributed by Ray Gaines, FCSI
A series of posts I shared previously on my own blog (which can be read here) began as a commentary on day to day communications when I explored the notion of how the same words could have completely different meanings given context, tone of voice, body language and other emotional cues. It quickly evolved into a second post on graphic construction communication.
This post deals with overly verbose specifications I often see from consulting engineers who are often not versed in specification writing principles:
“2.2 Materials & Equipment: standard components, of regular manufacture for this application. All systems and components shall have been thoroughly tested and proven in actual use. The commissioning requirements of this specification shall be strictly adhered to. Trane Tracer Summit ICS products are used as basis of the design. Siemens Apogee or Johnson Controls Metasys are acceptable subject to compliance with the specification”
“2.5.2 Communications: The Building Controller shall reside on the network, which is the same high-speed network as any connected workstations. The Enterprise wide network shall support the Internet Protocol (IP). Local connections of the building Controller shall be on ISO 8802-3 (Ethernet). Communications shall use Annex J of ASHRAE Standard 135-95. The Building Controller shall also perform routing to a network of Custom Application and Application Specific Controllers.”
The language I just quoted was written by a mechanical engineer as part of a building automation specification section. There is a problem with the fact that both paragraphs violate two of the four Cs of specification language promoted by CSI: clear, correct, complete, and concise. These two paragraphs are neither clear nor concise. Because they are unclear, I have no idea if they are correct or complete. They also appear to be combining prescriptive with performance specifications.
Assuming the technical content is indeed correct, the problem can be fixed by applying some basic principles espoused by the CSI in the CSI Specifications Practice Guide. The information presented should be separated into multiple (correct) locations to comply with CSI SectionFormattm. Portions of both paragraphs should appear in PART 1 GENERAL, and part of the second should be in PART 3 EXECUTION.
The remainder is correctly located in PART 2 PRODUCTS, but needs to be broken up into shorter statements using streamlined language in smaller subparagraphs to allow the reader to more easily access and understand the information.
The first paragraph could appear as follows:
2.2 Materials & Equipment
2.2.2 Basis of Design: Trane Tracer Summit ICS
The remainder of the non-superfluous information from this paragraph should appear in PART 1 GENERAL.
I could rewrite the second paragraph as well, but you get the idea. Adherence to CSI principles would facilitate communication of the information to the bidders and eventually to the contractor. Remember, communication occurs when the reader/listener understands the intent of the writer/speaker. When the information is correctly stated and presented, it is understandable by all the parties to the construction process. The CSI Education and Certification Programs are an important first step to better communication within the AEC industry.
Let's Fix Construction is an avenue to offer creative solutions, separate myths from facts and erase misconceptions about the architecture, engineering and construction (AEC) industry.
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