<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><title>Re: [Greenbuilding] Redoing all floors</title><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I would agree though I think diamond grinding would be the best surface finish result and even that... <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It is a shame. I’ve seen very few really good floors and even in the most high end projects and I have heard of a lot of disappointment. Typically most have imperfection upon imperfection. Badly placed control joints (cracking) + badly polished areas + badly finished areas + badly sealed floors which over time without further sealing can make everything even worse. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I think the problem is that a design may seem to require a slab so the concept is finishing the slab as a finished floor. That seems fair enough but then you start mixing structural with finish and the complexity builds as you are mixing trades and experience. When I used it the purpose was to create a floor structure and finished floor in one go. Metal or tile inlays were used to create control joints and visual keys (things you look at rather than the rest of the floor). We have had some pretty nice results but the work involved to create I felt could be done better with less material or cost so I stopped using slabs. Even for on grade construction I don’t think they are needed or desirable. You can get better results treating the floor finish as finish – small mortar slabs if you want the concrete look or whatever floor finish might work but isolate it from the insulation and support base.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> greenbuilding-bounces@lists.bioenergylists.org [mailto:greenbuilding-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Andrew Pace<br><b>Sent:</b> July-27-11 12:50 PM<br><b>To:</b> Green Building<br><b>Subject:</b> Re: [Greenbuilding] Redoing all floors<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>Jason...acid etching the concrete won’t remove the sealer and paint stripper won’t remove the stain. Acid etching only works when the acid has “access” to the free lime in the concrete. The sealer...seals it...so this isn’t an option. The stain should be in the concrete and not on top of it, so stripping wont be effective. The only way to remove the sealer and stain would be to shot blast. <br><br>Andrew Pace<br>Green Design Center® <br>Waukesha, WI<br><br><br><br><br>On 7/27/11 2:36 PM, "Jason Holstine" <jason@amicusgreen.com> wrote:</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.5pt;font-family:"Calibri","sans-serif"'>Can you etch the concrete to remove the current sealer, strip the stain with paint stripper, let the concrete properly dry and cure, then go back and stain and refinish?<br><br>Also – any concrete will naturally have a certain unpredictability in the finish pattern, with random burnishing and highs and lows of color. So I typically recommend take advantage of that, fly with it, and stain with a creative, random, very cool stain pattern. You won’t know what’s mistake/old mess-up and what’s intentionally part of the pattern.</span><o:p></o:p></p></div></body></html>