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Sacramento, CA
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Lafayette, Louisiana
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 Bathroom insulation and vapor barrier?
[#2] Posted: 09/11/2011 - 05:20:34 AM |  |  |
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| Quote: Originally posted by antnida
My question is do I insulate all the wall down the wall around the tub or just to the lip of the tub only?
All the way down the wall. Otherwise your insulation envelope will have a big hole in it behind the tub.
Quote: As for the ceiling, do I install faced or non faced insulation?
Faced. 'Faced' means that it has a vapor barrier on it, which you should have to retard the flow of moisture from the bathroom interior to the attic space.
Quote: One more question that does not related to insulation, is the bathroom's sub floor, right now it's 2x6, should I add a layer of plywood before putting down a layer of cement board for tile on the floor area?
I see no reason for that. You do understand the difference between 'floor joist' and 'subfloor' do you? 2X6 is a common size of lumber for joists but I've never seen it installed as subfloor. Subfloor is usually 1X planks or 3/4 plywood.
Marc
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"If Guam gets too overpopulated, it might tip over."
Congressman Hank Johnson (D) GA |
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Chicago, IL
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Bathroom insulation and vapor barrier?
[#3] Posted: 09/11/2011 - 06:20:03 AM | | |
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Marc alludes to my concern.......i.e.....you don't know enough terms for anyone to provide good direction without writing a how to manual.
All the big boxes carry durock; maybe they're out.
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Kurt in Chicago
"If I smell it, it goes in the report".............Phillip Smith...2012
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Gaston, Oregon
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Bathroom insulation and vapor barrier?
[#4] Posted: 09/11/2011 - 10:39:05 AM | | |
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Kurt & Marc are forgetting that in the west coast states 2x6 subflooring was the dominant floor framing model for a long time and, in some areas, still is.
How far apart are the girders under your subflooring? That will determine how stiff the floor is and whether or not it would be a good idea to add plywood.
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Jim Katen, Oregon
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Chicago, IL
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Bathroom insulation and vapor barrier?
[#5] Posted: 09/11/2011 - 11:52:59 AM | | |
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Forget? Heck, I didn't know.
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Kurt in Chicago
"If I smell it, it goes in the report".............Phillip Smith...2012
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Lafayette, Louisiana
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Bathroom insulation and vapor barrier?
[#6] Posted: 09/11/2011 - 12:08:55 PM | | |
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I'll be dang.
How do you figure deflection where the joists are 2X members laid broadside?
Marc
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"If Guam gets too overpopulated, it might tip over."
Congressman Hank Johnson (D) GA |
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Gaston, Oregon
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Kenmore, WA
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Bathroom insulation and vapor barrier?
[#8] Posted: 09/11/2011 - 7:29:19 PM | | |
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I don't run any calc's but I do do the highly scientific tests on floors sometimes. . . I bounce on them.
The 2 x 6 T&G "car decking" subfloors hardly ever rattle the dining room table. "Modern" system usually do.
Jim mentioned girders on 4' centers. I often seem them on 5' or 6' centers.
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Randy Navarro
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Kenmore, WA
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Bathroom insulation and vapor barrier?
[#9] Posted: 09/11/2011 - 7:38:54 PM | | |
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Oh. . . the original poster's questions . . .
Insulation all the way to the floor.
If you don't want to investigate if your floor is stiff enough, add a layer of 5/8" or 3/4" plywood, then cement backer. Make sure you'll be ok with the lip on the floor created by the added plywood though.
Vapor retarder/barrier. . . ? That's a bit more tricky. . . go to buildingscience.com. I'm sure they've got a good wall detail for your climate.
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Randy Navarro
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Gaston, Oregon
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Collins, NY
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Bathroom insulation and vapor barrier?
[#11] Posted: 09/12/2011 - 05:03:51 AM | | |
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Insulation on the exterior wall and ceiling needs a vapor barrier. As for what kind and where to place it, I have no idea what is customary in Cali. Insulation on interior walls is for sound control and should not have a vapor barrier at all.
I think I'd want to incorporate some kind of isolation membrane into that tile floor regardless of whether you add plywood or not. Think Kerdi or Schluter.
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Tom
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Life is tough enough as it is, it's tougher when your stupid. Don't do stupid things.
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Kenmore, WA
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Bathroom insulation and vapor barrier?
[#12] Posted: 09/12/2011 - 05:44:14 AM | | |
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Quote: Originally posted by Jim KatenQuote: Originally posted by randynavarro
. . . Jim mentioned girders on 4' centers. I often seem them on 5' or 6' centers. . . Most of what I see is hemlock and it's only supposed to span 4'. You're allowed to go up to 5' if you use fir. It's never supposed to exceed a 5' span. Of course, I see it done occasionally out in the sticks and across the river in . . . ahem . . . Washington State.
We'uns is uncivvylyzed up he'ah.
Wun Teem - Wun Fyt!!!
Mike
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Newberg, OR
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Oak Park, IL
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Sacramento, CA
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Bathroom insulation and vapor barrier?
[#15] Posted: 09/12/2011 - 10:05:37 PM | | |
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Thanks you everyone for helping out, with today economic state we just afford to hire a contractor for this remodeling task being handy around the house I just have to do a lots of reading, ask questions and do my best :)
I haven't got a chance to go down to the sub floor to measure how far apart are the griders as of yet, too bz tearing down all the sheet rock, no insulation on any of the walls there are very fine one on the ceiling though.
I understand the differences between floor joists and subfloors, just haven't seen one that did it with 2x6 vs plywood. Talking about plywood, there aren't any on the exterior wall either, doesn't looks like it required in the 60's.
Going back to the insulation and vapor barrier for the bathroom, if I were to use unfaced insulation with vapor barrier then the material for the vapor barrier would be Certainteed MemBrain.
Looks like at this point I will be installing faced insulation for all exterior walls and unfaced for interior walls. As for the bathroom floor, I'll just install cement board and tile over it. I'll post some pictures once insulation is completed.
Thanks
Tony
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Gaston, Oregon
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Chicago, IL
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Bathroom insulation and vapor barrier?
[#17] Posted: 09/15/2011 - 06:13:53 AM | | |
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Reviving an idea tossed about in a couple threads recently...
Joe's got a good Insight on it.
http://www.buildingscience.com...ght/view
Still don't know anything about girder/T&G floors.
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Kurt in Chicago
"If I smell it, it goes in the report".............Phillip Smith...2012
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Lafayette, Louisiana
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Bathroom insulation and vapor barrier?
[#18] Posted: 09/15/2011 - 06:44:46 AM | | |
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He's a funny guy. Both knowledgeable and funny. I like his style of writing.
Marc
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"If Guam gets too overpopulated, it might tip over."
Congressman Hank Johnson (D) GA |
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Collins, NY
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Bathroom insulation and vapor barrier?
[#19] Posted: 09/15/2011 - 07:20:32 AM | | |
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His seminars are worth far more than the price of admission. If you ever get the chance to go to one, don't miss it.
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Tom
http://clearcreekhomeinspection.com/
Life is tough enough as it is, it's tougher when your stupid. Don't do stupid things.
Dr Joe Lstiburek |
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