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How thick is your floor?
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04-10-2012, 06:14 PM #11
Rubensgt40 Concrete Moisture Coach ***
Status: Offline Posts:172 Threads:13 Joined:Oct 2011
I've noticed this brought up on other threads- how can you be sure you're adhering to the letter of F2170 without knowing the exact slab depth?

I suppose if it went to a claims court you'd argue that the builder's specs were the only credible source.

And... if you drilled a depth test hole, wouldn't that puncture the under-slab retarder?

That StructureScan toy might not be such a bad idea. How expensive can they be? Big Grin

The problem with socialism is that you soon run out of other people's money.
- Margaret Thatcher


04-10-2012, 07:29 PM #12
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
Yes I puncture the vapor retarder when I drill through, then I fill the holes with epoxy. It's the only sure-fire way of determining depth I know of.

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

04-10-2012, 08:02 PM #13
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
(04-10-2012, 07:29 PM)CC Solutions Wrote:  Yes I puncture the vapor retarder when I drill through, then I fill the holes with epoxy. It's the only sure-fire way of determining depth I know of.

You mean besides the scanner.

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com

04-10-2012, 08:16 PM #14
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
You have a scanner that can tell me the depth of concrete on a compacted stone base to within 1/2"?

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

04-10-2012, 08:41 PM #15
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
Just because you fill the puncture with epoxy; does that unequivocally insure the puncture is sealed? I hardly think so.

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com

04-11-2012, 06:30 AM #16
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
(04-10-2012, 08:41 PM)Ernesto Wrote:  Just because you fill the puncture with epoxy; does that unequivocally insure the puncture is sealed? I hardly think so.

Yes that insures the puncture is sealed. This is how we seal cracks, holes and repairs. That epoxy is many times stronger than the concrete, and many times more waterproof. Wink

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

04-11-2012, 06:57 AM #17
Ernesto Concrete Moisture Expert *****
Status: Offline Posts:606 Threads:33 Joined:Sep 2009
So, your going to drill a test hole at every test site to insure your within 1/2 inch huh?

Stephen Perrera dba
Top Floor Installation Co.
http://www.tucsonazflooring.com
http://www.floorsavior.com

04-11-2012, 07:36 AM #18
CC Solutions Concrete Moisture Evangelist *******
Status: Offline Posts:1,065 Threads:69 Joined:Dec 2009
Not at all. At least not with slab on grade concrete. The testing protocol laid out in 2170 does a good job of exposing abnormalities, and any noted discrepancies can be further investigated by drilling confirming test holes for depth. So what I'm saying is if we install probes near exterior walls, near entrances and sprinkled throughout after that, and we know what the designed depth of the slab should be, a couple of proofing holes is all that would be required for a standard test. If probe readings start coming in all over the charts or if an installer wants to push the limits of a test, we may do more proofing.

Slabs in pans need to either use a floor scan tool or be drilled for depth to locate the flutes.

JD Grafton
Concrete Answers for Flooring Problems
JGrafton@ccsolves.com

07-18-2013, 11:21 PM #19
Taseera Banned
Status: Offline Posts:1 Threads:0 Joined:Jul 2013
A flooring contractor used Wagners to test a new slab and the GC wanted a second opinion.

I was called in and tested a few locations using the same Rapid RH (is there anything else? Tongue ) and concurred with the flooring sub that the floor was too wet for the flooring they were installing.

The floor was put in anyway, using a latex sealer and 'special' glue. It is failing just a few months later.

I was called in again and asked to evaluate the slab, starting with RH. This is where things get more serious. We have a failure so now we have to ramp it up a bit. Even though I am being told the slab is 4" thick, I need to verify that it really is. Well guess what?

07-19-2013, 04:28 PM #20
CCR Concrete Moisture Coach ***
Status: Offline Posts:236 Threads:14 Joined:Dec 2011
What? Are you going to drill pilot holes all over the job to verify the depth? Why on earth would they proceed with flooring installation in the first place? Actually, no need to answer my second question. Big Grin

JK Nixon
Concrete Restoration Services, LLC
Pittsburgh, PA
http://www.rhtester.com








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