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Old 06-29-2010, 10:44 AM   #1
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NOT using green board...


HI all. I'm about to demolish (partly) a bedroom that I'm turning into a second bathroom. I'd very much like to leave some of the existing drywall intact, however it's not green board. Is there a legitimate sealing compound, paint, or ??, that I can apply to the old surface that'd make it impervious and thus safe to leave on? Hope so. Thanks for any replys...

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Old 06-29-2010, 11:10 AM   #2
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NOT using green board...


Green board is no longer approved for damp applications - it's actually worse that the regular stuff.

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Old 06-29-2010, 11:33 AM   #3
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NOT using green board...


If you are concerned with the walls and ceiling away from the tub/shower regular drywall is fine.


Proper painting will protest it.--Mike--


Wet areas need durrock or other approved backer.
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Old 06-29-2010, 09:20 PM   #4
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NOT using green board...


Be sure to notify local B.D. of the added bathroom, especially if on City sewer.......

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Old 07-01-2010, 10:33 AM   #5
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NOT using green board...


We are rural and on a septic system GBR. The increased flow because of two br's will be minimal except when family members are there. I plan to use cement board where the shower will be and the rest regular board I guess. Thanks guys. Any additional feedback is appreciated. I've learned a lot from this DIY forum.
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Old 07-01-2010, 01:25 PM   #6
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NOT using green board...


if you use cement board put roofing felt between it and the studs. cement board can transfer moisture through it
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Old 07-01-2010, 03:14 PM   #7
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NOT using green board...


Quote:
Originally Posted by racebum View Post
if you use cement board put roofing felt between it and the studs. cement board can transfer moisture through it

Never seen that done. I've got two houses done otherwise... hmmmm, opps!
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Old 07-02-2010, 02:31 AM   #8
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NOT using green board...


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Never seen that done. I've got two houses done otherwise... hmmmm, opps!
might not be oops at all, a lot of guys don't do it. it's just a cheap backup if any moisture ever does get in seams or transfer through. one roll of $20 felt will do a lot of work
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Old 07-02-2010, 03:04 AM   #9
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NOT using green board...


Quote:
Originally Posted by oh'mike View Post
If you are concerned with the walls and ceiling away from the tub/shower regular drywall is fine.


Proper painting will protest it.--Mike--


Wet areas need durrock or other approved backer.

I hope not much
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Old 07-09-2010, 10:30 AM   #10
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NOT using green board...


Quote:
Originally Posted by racebum View Post
if you use cement board put roofing felt between it and the studs. cement board can transfer moisture through it
new bathroom on my list too - and I have leftover felt sitting around - that's a great tip - might as well use some of it up - thanks...
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Old 07-09-2010, 10:32 AM   #11
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NOT using green board...


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Originally Posted by md2lgyk View Post
Green board is no longer approved for damp applications - it's actually worse that the regular stuff.
Is the blue board (humitek?) any better, e.g. worth the extra $$$?

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