For flooring and concrete professionals, ASTM F provides the standard for using relative humidity RH testing when measuring moisture content in concrete slabs. Meeting this standard provides the groundwork for limiting moisture-related flooring problems and the many liabilities and mitigation problems that can result from excess moisture. The standard provides precise guidelines for RH testing methods. While any professional must understand the exact requirements of standard F the most recent version , the following are 10 guidelines to help ensure that you have met the criteria laid out in ASTM F These requirements for the standard apply regardless of the RH test method being used. Is this acceptable or compromise the test?
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For flooring and concrete professionals, ASTM F provides the standard for using relative humidity RH testing when measuring moisture content in concrete slabs.
Meeting this standard provides the groundwork for limiting moisture-related flooring problems and the many liabilities and mitigation problems that can result from excess moisture. The standard provides precise guidelines for RH testing methods. While any professional must understand the exact requirements of standard F the most recent version , the following are 10 guidelines to help ensure that you have met the criteria laid out in ASTM F These requirements for the standard apply regardless of the RH test method being used.
Is this acceptable or compromise the test? Thanks for the reply, Patrick. We have people who use the Rapid RH on shallow pours. The only thing we recommend is that you ensure that there is a good seal between the sensor body and the concrete wall. Thanks for the question. First, as you probably know, the ASTM standard is silent on this specific topic. That being said, I have heard a couple of different methods people are using. If you forward to into this video, I will explain.
If i have an area of approx sq ft and have done the required testing for the area, and 5 fail and 3 pass does the whole area fail? How do you handle this problem? At this point, if one test fails, they all fail. I would verify that the hole depths are consistent and that environmental conditions are at service conditions. Good luck. Jason, I appreciate this means to contact you. Can you please let me know your recommendation on this?
First, I have to state that F is specified for interior applications that are under consistent ambient air controls. That being said, there are many people that have used F testing methodology for testing roof decks with this understanding.
The first thing I would look at is the assembly that you are installing. Does the finish roof product have specifications for testing the concrete deck? If not, call their technical team and ask the questions. Once you find out the methodology they require to meet warranty, I would reach out to someone within RCI in your area to conduct the tests. I hope this helps. I have heard two different opinions on locations of holes. Include a test location within 3 ft 1 m of each exterior wall.
For example, If there are 12 tests over the course of the entire project 10,sf and 1 fails, does the entire test fail? The manufacturer is going to be the one that usually makes the determination based on the circumstances because they have a warranty to hold.
I can say though, it is a fairly consistent stance that if one fails the floor fails. Can you tell me what humidity percentage fails or passes for a 5 inch slab on grade or first floor Thank you Derren Harper.
The answer is, it depends. It depends on the type of floor, sometimes even the manufacturer, and the adhesive being used. General ranges for finish classification:. Jason, Great information, Thank you. I am testing to see if a concrete slab in a ground floor condo unit is good or bad.
I think they should have placed 3 RH test probes based on what I read. Can you tell me with some supporting information did this slab pass or fail? Some materials are less moisture sensitive and more breathable. No matter, replacing the slab should only be looked at if there is some type of structural reason for it.
If you have alleviated all of the potential issues for this level of moisture ie broken pipe, drainage, etc. When figuring the sf, do i need total sf of slab or just sf of where actual flooring is to be installed? Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed. My Account 0 items Jason Spangler.
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ASTM F2170 Explained
ASTM International is an organization that defines and sets various standards for ensuring quality and safety for different products and services. Globally, the organization has released over 12, standards. ASTM F is the standard for testing relative humidity in concrete floor slabs used by contractors all over the U. But, why is this standard so important to any contractor dealing with concrete? When there is excessive moisture in a concrete slab, it can have a negative impact on any flooring systems installed over the slab.
10 Guidelines for ASTM F2170 Preparation and Testing