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Old 12-15-2011, 06:39 PM   #1
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Pine cathedral/vaulted ceiling


I will soon be installing a pine T&G ceiling in a country cottage. I saw some pictures where the installation was from the peak down. I would have gone from the bottom up to the peak. Can someone shed some light? Any reason why?
Thanks, Mark

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Old 12-15-2011, 10:29 PM   #2
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Pine cathedral/vaulted ceiling


I would think that maybe you don't want to end up with a skinny/cut piece at the highly-visible peak of the ceiling. Then again, I probably would have started bottom-up myself (having never thought about this).

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Old 12-16-2011, 08:42 PM   #3
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Pine cathedral/vaulted ceiling


I'd rather the most difficult piece be were it is easy to get to. you can also cover the cut with trim down low.
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Old 12-16-2011, 08:46 PM   #4
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There is no reason not to start from the bottom. The rip will be up where noone can see it.

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Old 12-16-2011, 08:52 PM   #5
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I always start at the bottom. That's where the eye is most of the time. Trim the peak if need be.
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Old 12-17-2011, 04:06 PM   #6
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Pine cathedral/vaulted ceiling


Mark,

Can I ask how you plan to install the T&G boards? Will there be another product between the T&G boards and the rafters?
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Old 12-17-2011, 04:09 PM   #7
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Mark,

Can I ask how you plan to install the T&G boards? Will there be another product between the T&G boards and the rafters?
There shouldn't be anything. I'm sure they have insulated between the rafters.
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Old 12-17-2011, 04:29 PM   #8
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Pine cathedral/vaulted ceiling


Well that is a problem I am dealing with currently.

My pine T&G boards have dried more over time and has caused a gap where the tongue meets the groove. I have nothing above the boards except kraft faced batt insulation. No air seal between the living sapce and attic.

In my opinion, pine T&G boards cannot provide the air seal needed between the living space and attic. In the winter I loose heated air up into the attic and in the summer I get hot attic air into the conditioned living space.

From what I have learned here and elsewere, insulation does not stop air movement.
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Old 12-17-2011, 04:51 PM   #9
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Quote:
Originally Posted by Earnie View Post
Well that is a problem I am dealing with currently.

My pine T&G boards have dried more over time and has caused a gap where the tongue meets the groove. I have nothing above the boards except kraft faced batt insulation. No air seal between the living sapce and attic.

In my opinion, pine T&G boards cannot provide the air seal needed between the living space and attic. In the winter I loose heated air up into the attic and in the summer I get hot attic air into the conditioned living space.

From what I have learned here and elsewere, insulation does not stop air movement.
I'm lost. I thought you said you were getting ready to install a new ceiling, but now you say the boards have bowed indicating the ceiling is already there. Which is it?
(and you can lay plastic over the insulation to stop air flow)
And if the t&g has a nail in every rafter or joist, the boards can't move, can't spread apart.
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Old 12-17-2011, 05:04 PM   #10
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Pine cathedral/vaulted ceiling


Sorry, this needs a bit of clarification.

Mark, the original poster, stated he would be installing the ceiling. I was just asking him how he planned to install the T&G boards.

Well, the boards shrunk or were not installed correctly. Either way, I have gaps in the T&G so I know air is moving through that area. To me, drywall or some type of air seal should have been installed prior to installing the T&G boards.
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Old 12-17-2011, 05:07 PM   #11
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Quote:
Originally Posted by Earnie View Post
Sorry, this needs a bit of clarification.

Mark, the original poster, stated he would be installing the ceiling. I was just asking him how he planned to install the T&G boards.

Well, the boards shrunk or were not installed correctly. Either way, I have gaps in the T&G so I know air is moving through that area. To me, drywall or some type of air seal should have been installed prior to installing the T&G boards.
No. They never put anything like drywall under it,.although I guess there's nothing wrong with that. You need to lay some plastic down in the attic I guess.
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Old 12-17-2011, 07:02 PM   #12
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Pine cathedral/vaulted ceiling


Start from the bottom. Otherwise, you'll be using the nail gun upside down. Lots more difficult LOL.
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Old 12-17-2011, 11:41 PM   #13
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Pine cathedral/vaulted ceiling


Hi Gents. I appreciate all the comments. The t&G will go over insulation and a vapour barrier. ... no drywall underneath. As to shrinkage, I know of a friend who experiencerd this and it is usually due to new wood. As the boards age they do shrink but if the installation is done with a tight fit, the appearance is minimal over time.
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Old 12-18-2011, 08:13 AM   #14
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Pine cathedral/vaulted ceiling


Mark,

I'm no expert in construction or energy efficiency. From what I have learned there is a difference between a vapor barrier and an air barrier. Also, I've been told that batt or blown unsulation does not provide and air barrier. I believe spray foam does. I'm still reading and learning before I attempt to correct my T&G ceiling problem.

I found this discussion at Green Building Advisor:

http://www.greenbuildingadvisor.com/...groove-ceiling

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Last edited by Earnie; 12-18-2011 at 08:18 AM.
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