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VCT Over CutBack
02-26-2014, 04:37 PM
Post: #7
RE: VCT Over CutBack
No moisture limit but a pH limit? Tongue

As moisture moves through a slab the pH level can rise. So initially, you may have high moisture emission but a low (or relatively low pH especially if the surface is carbonated) pH reading.

Adding a second layer of flooring or a flooring with a very low permeability will often cause a build up of moisture and a corresponding increase in alkalinity at the adhesive bond horizon.

The flooring manufacturer then is called to investigate the subsequent failure, peels back the flooring, dips a test strip in the wet slimy adhesive and smugly states the pH is too high!!!

I've seen this happen all too often. Realistically we need to be concerned with the moisture in a slab first and foremost, because with low moisture, pH and/or alkalinity is not going to be an issue.

JD

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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Messages In This Thread
VCT Over CutBack - Ernesto - 02-04-2014, 10:27 AM
RE: VCT Over CutBack - eaadams - 02-19-2014, 10:37 AM
RE: VCT Over CutBack - CC Solutions - 02-25-2014, 06:04 PM
RE: VCT Over CutBack - eaadams - 02-25-2014, 10:50 PM
RE: VCT Over CutBack - hausenheimer - 02-26-2014, 06:58 AM
RE: VCT Over CutBack - M.K.Pecou - 02-26-2014, 07:30 AM
RE: VCT Over CutBack - CC Solutions - 02-26-2014 04:37 PM
RE: VCT Over CutBack - Ernesto - 02-27-2014, 03:02 PM