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Post by chiller on May 24, 2007 20:33:06 GMT -5
Hello all, This is my first post so go easy on me. I am a general remodeler who hangs about 500 sheets a year. From reading the various links I found the Straightflex corner tapes and decided to give them a try. I am really impressed with them and how clean the corners are. Ok, heres the problem and question. When I started putting it up I was using Pro Form all purpose black lid mud. After that can was done I switched to USG all purpose green lid. After the switch the Straightflex seems to not adhere as well and seems to be bubbling in places. I checked on the USG web site and the Green lid is not listed, just a all purpose black lid. Could there be that much of an adhesion difference between the Proform black and USG Green? Thanks for any and all responses Chuck
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Post by captsheetrock on May 25, 2007 15:10:02 GMT -5
Hi and welcome, Be glad to help you if I can, but I need some more info, not sure about what your doing. What kind of straightFlex are you using (orginal, med, tuff tape, etc) and are you putting this on inside 90s, inside off angles or outsides(like corner beads)
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Post by Chuck on May 25, 2007 18:01:17 GMT -5
Hi, I am using the original Straightflex on both inside and outside corners, 90 degree. The bubbling is happening on the inside corners. I am using a very heavy coat of mud, probably twice the thickness used with normal paper tape and pushing very hard to embed it solidly. Chuck
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Post by captsheetrock on May 25, 2007 19:55:59 GMT -5
Heres a thought, not seeing it firsthand this may or may not help,
once you bend it into a 90,(like a cornerbead) if it bends, one side will buckle,like bending a piece of angle iron. So if you are running it over the flat before the flat is beded, it will cause a buckle in the straightflex at the flat, your pushing it deeper into the wall then the rest of the corner. If this is whats happening, you need to tape and bed the flats before you tape the corners, or you can cut the blister with a razor, this will relieve the tension and it will lay down for you. I like to cut a small V so there is no lap over when the two pieces meet. BTW, straightflex sells a glue in a quart bottle that you can mix with the mud to make it stick better. just squirt some in your pan and stir it up, or mix it into a bucket of mud. Good luck, hope this helps
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Post by chiller on May 31, 2007 17:59:48 GMT -5
Hi Guys; Sorry I haven't been able to post back for a few days but the holiday travel and the kids getting out of school have ate up all the extra time. I have still been working with the Straightflex and have come to some further conclusions about it; 1. When the board is hung there had better not be any gaps, waves or any other type of defects present. 2. The underlying framing had better be dead nuts on or the waves in the corners will kill ya. The job I'm doing now is refurbing an 120 yo house. Most of the rock has gone over the existing plaster walls with some minimal re- framing.My son and I did the framing. The rock has some defects, not a perfect job by any means. My son and I did that also. Detect a pattern here. ;D ;D ;D ;D I guess it boils down to it creates a beautiful solid corner but is very unforgiving. I gave up using it on inside corners, went back to plain paper tape and am just using the Straightflex for outside corners. I like it there much better than metal corner bead. I used up all my green lid mud and switched back to the black lid and a lot of the adhesion problems seemed to have gone away execpt for the areas as stated above. I appreciate your responses and I am sure I will be coming up with more questions and problems as time goes on Best to all, Chuck
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Post by captsheetrock on Jul 12, 2007 14:59:29 GMT -5
I agree with that, I try not to use straight-flex at all if I can help it, I like the level-line and / or zooma-tape, beacuse it has paper, and will stick better, If someone insists that I use straight-flex, I make SURE they understand I am not gaurenting it not to turn loose, If they want me to stand behind it, it has to be level-line or zooma-tape. Their really is that much differance in their ablility to hold. Since they are all about the same money your not out anything, except some head aches. And I also only use them for off angles. I use vinyl 45's (glued on) for outsides and staright-flex for insides. Good-luck, and keep working with it, you'll get the hang of it.
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