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David Axt, AIA, CCS, CSI
Senior Member
Username: david_axt

Post Number: 576
Registered: 03-2002
Posted on Thursday, November 10, 2005 - 04:50 pm:   Edit PostDelete PostPrint Post

What is the best way to protect fresh poured concrete floors that will receive a stain?
Anne Whitacre, CCS CSI
Senior Member
Username: awhitacre

Post Number: 265
Registered: 07-2002
Posted on Thursday, November 10, 2005 - 04:55 pm:   Edit PostDelete PostPrint Post

if the construction period is of any length, you might find the contractor objecting to having to protect the floors for that length of time -- and they will probably propose a coating, or thin topping like Ardex that they can put on near the time of Owner acceptance. we do concrete stains a lot, and I can't think of a project where the actual slab has been protected until staining. when I used to do interior build outs for Starbucks, they would do a topping slab and then stain it as soon as it was cured enough to receive the stain. Those projects had short build out times, and the risk of damage was relatively slight.
David Axt, AIA, CCS, CSI
Senior Member
Username: david_axt

Post Number: 577
Registered: 03-2002
Posted on Thursday, November 10, 2005 - 05:35 pm:   Edit PostDelete PostPrint Post

Anne you are correct. The best thing to do is to pour a structural slab, then pour a self leveling concrete underlayment and stain it. But unfortunately we are not dealing with that situation. We have tried hardboard, plastic and cardboard with less than satisfactory results.
J. Peter Jordan
Senior Member
Username: jpjordan

Post Number: 152
Registered: 05-2004
Posted on Thursday, November 10, 2005 - 05:49 pm:   Edit PostDelete PostPrint Post

Our firm does a lot of tilt-up construction with the panels cast on the floor slab. It is impossible to adequately protect the slab so that it will take a good finish, a fact (not opinion) that most designers and owners find difficult to accept.

It isn't just the abuse such floors will receive, it's that unless the slab was poured at the same time from the same truck at the same temperature, there will be variations on the material even if it is finished well (floating and troweling) and protected adequately.

Of course, the sampe people who want a uniform slab to work with may not be satisfied with the "blotchy" appearance that stain will inherently have. Moreover, the stain will probably interact differently with concrete from different mixes poured on different days at different temperatures giving even more variations.

Bring on the carpet!

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