Contributed by Chris Maskell
The flooring industry is constantly challenged by the same repeating issues. Installing too early, wet concrete, non-flat sub-floors, sub-floor surface not prepared, heat not on, windows not in and lack of installer training and certification. In fact, as construction speeds up to meet demands for faster build times and with the threat of an increase in the cost of borrowing money lurking in the economic wings, the provision of acceptable conditions for the flooring contractor is becoming less likely.
This raises the importance of supporting those in the construction team (Building Owner, Construction Manager, General Contractor, Design Authority, and Flooring Contractor) with good, timely information that helps all involved plan ahead for the floor covering installation. As one of the last significant trades onsite, the flooring contractor needs certain conditions, that if not planned for in advance, will be next to impossible for the Construction Manager/General Contractor to provide without extra time and/or extra money: two things in short supply at the end of a build or renovation.
Change is possible, but requires a few things to be understood and acted on in advance.
There is a generic Canadian floor covering industry reference manual available for specification, which supports all construction parties, and when included in the Division 09 section of the construction documents, means correct flooring processes and supportive language is available to guide the floor installation and all the points listed below.
Contributed by David Bishton
Breakfast? With a specifier? You may wonder about the wisdom of such an engagement, but it is a unique experience. It occurred to me today that there are some uncanny similarities between project specification preparation and the simple (or complex) task of preparing breakfast. In this case, breakfast for a crowd.
The first thing to know is that the Specifier comes to YOUR house, either in person or virtually or both, to help YOU plan and make the breakfast. So wait, I can hear you say, the SPECIFIER DOES NOT DO ALL THE WORK? In case you hadn’t noticed I use capital letters for emphasis – I learned it from this really smart 5th grade (I assume) kid I found on Twitter. Anyway, the answer is no, but the Specifier can be your most able assistant.
So how does it work? The first thing I as a Specifier want to know is more about what’s on the menu – what did you have in mind to serve this big crowd that you’ve invited over? Oh, it’s a pot luck! You have the main course and everyone is bringing something to the table. So how can I help – what’s in the fridge?
I open the refrigerator door and what to my wondering eyes should appear? A miniature sleigh – wait, that’s from another story – a really large tray of the most beautiful eggs I’ve ever seen. And every nook and cranny stuffed with marked and unmarked containers of every size and shape. You are REALLY PROUD of those eggs! So how can I help? I can chop onions, garlic, veggies, make sausage, prepare a fruit salad, get all the herbs lined up, make toast, help set the table – I’ll even go to the store if you need something. Just tell me what you need. “First, look through this 150 page recipe and find the ingredients. Then figure out what’s in all these containers. I might be missing some things.”
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 Jason Spangler
For years now, the in situ relative humidity (RH) test for measuring the moisture condition of concrete has been shown to be the most reliable, accurate test available.
As far back as the 1960s, laboratories at the Portland Cement Association conducted controlled tests that verified the accuracy of RH testing. This research was followed by years of additional testing at Lund University in Sweden and elsewhere. In 2002, ASTM International first established the F2170 standard for conducting RH tests on concrete slabs.
The research confirmed two key discoveries:
Other methods typically involve taking measurements only at the surface of the slab. As the research has found, a surface-based moisture test can’t provide an accurate measure of a slab’s true moisture condition. That’s because it doesn’t account for the moisture conditions deeper within the slab, and those conditions are typically quite different than conditions at the surface.
The Standard Evolves as the Science Tells Us More
The initial ASTM F2170 for in situ RH testing was established in 2002, after continuing research at Scandinavian universities in the 1990s identified the exact specifications for conducting a reliably accurate RH test—placing the test probe at 40 percent depth for slabs poured on grade or 20 percent for slabs drying from both sides. After these scientifically-validated specifications were firmly established, ASTM International published a usable standard.
Until now, the ASTM F2170 standard has required a 72-hour waiting period between drilling the test holes where the RH probes are placed and taking official RH measurements. In practice, readings are often taken before the 72 hours has passed, so contractors have an idea of how things are trending. But because the official readings couldn’t be taken before 72 hours, that meant all decisions and work were basically on hold for those three days. Full stop.
Yet we’ve seen how the research on the RH test method has helped to refine our understanding of how best to use it. This trend continues. In 2014, a Precision and Bias (P&B) study, commissioned by the ASTM committee, tested for differences in RH readings at various intervals within the 72-hour period. In part, the idea was to assess if it is actually necessary to wait the full 72 hours for an accurate, actionable moisture readings.
Contributed by Cherise Lakeside
If you haven’t read my previous blogs, as a bit of history, I have worked in Architecture for most of my career (in 3 different firms), as well as in Construction and Engineering. All of these firms did some form of public work. A couple of them performed public work almost exclusively, one of which I was at for 23 years.
I guess that is a long way of saying that I have worked on, and prepared architectural specifications, standards and documents for a ton of public projects over my 30+ year AEC career. I would venture to say that I am fairly well versed in what it takes to get a public project out the door. You could also say that I have seen it all.
For those without experience in public projects, the differences in the documents between public and private work are notable and they typically take a lot more time. Why is that you ask?
Besides the typical code compliance items that need to be addressed, public work requires compliance with public contracting laws and bidding procedures. Public contracting laws vary from State to State. In addition to State rules, you may also have to deal with Federal, City, County, Environmental, local jurisdictions and then the actual specific public agency’s rules, as well. Also, many public agencies also require at least three equal products on everything in the building to promote competitive bidding, since it is a low-bid wins environment. This is not always easy to do and there really is no such thing as perfectly “equal” products. This also leaves room for dispute.
These rules are the law and must be complied with. If they are not, a Contractor may have right to file a dispute and have the bids thrown out to force a rebid. Contractors watch for these things, as it may give them another avenue to pursue if they are not the low bidder.
To add on to the complexity, many of the specific agencies have their own front end documents (Divisions 00 and 01), which may not be coordinated with your technical specifications. Some agencies have their own technical specifications, as well. These are documents that you are expected to work with, you have never seen before and you have no background on the decision making process of the content or the qualifications of the agency staff who wrote the content. You have no idea if it is even current. And often, it isn’t.
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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