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Epoxy over 7 day old slab
08-20-2011, 09:47 PM
Post: #8
RE: Epoxy over 7 day old slab
EC, you sound like a pretty smart fella...
Consider this:
You take an MVER using F1869 on your burned-black, hard surface, compacted concrete. You get a reading of 5lbs. Now to increase your primer bond to the concrete you blast the surface with your handy-dandy blaster machine.

What is the MVER AFTER you blast? You have ripped apart a perfectly good suppression barrier of a tightly bound cement matrix... Your MVER will go through the roof! And if you put a tight vapor retarding floor on the concrete surface, you will suppress moisture that would have dissipated naturally and as the concrete moisture redistributes and equilibrates through the depth of the slab the MVER can definitely become significant.

I have worked on many slabs that were treated when they were 7 pound slabs and after a failure they were tested to be 12 pound slabs. Or the alkalinity is high and the warranty doesn't cover that!

You know you can go pick up some Ardex MC Rapid for less than $1/sf and have a bulletproof warranty.... Why mess around with a spray and pray or sweep and roll on product with a terrible warranty???

I just don't understand why installers are rolling the dice with any installation when the perfect system is really quite reasonable....

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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Messages In This Thread
Epoxy over 7 day old slab - ec-Indy - 08-18-2011, 03:08 PM
RE: Epoxy over 7 day old slab - Ernesto - 08-18-2011, 07:30 PM
RE: Epoxy over 7 day old slab - ec-Indy - 08-18-2011, 10:29 PM
RE: Epoxy over 7 day old slab - Ernesto - 08-19-2011, 08:00 PM
RE: Epoxy over 7 day old slab - ec-Indy - 08-20-2011, 12:48 PM
RE: Epoxy over 7 day old slab - CC Solutions - 08-20-2011 09:47 PM
RE: Epoxy over 7 day old slab - ec-Indy - 08-21-2011, 02:26 AM
RE: Epoxy over 7 day old slab - ec-Indy - 08-21-2011, 08:13 AM
RE: Epoxy over 7 day old slab - eaadams - 08-25-2011, 11:01 AM
RE: Epoxy over 7 day old slab - rthompson - 08-26-2011, 02:03 PM