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SIP seams in drywall on ceiling

Last Post 09 Dec 2010 08:00 AM by cmkavala. 3 Replies.

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brewcrew

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Posts:11

08 Dec 2010 12:12 AM
We have a SIPS house that's 20+ yrs old. In the right light, a couple of the seams of the ceiling panels can be seen from inside on the drywall ceiling. It's not significant and it's only about 4 seams in the whole house, but I was just curious what causes this. I've read about a "ghosting effect" that I can see from the outside when there is frost on the roof. Do the visible seams on the inside have something to do with condensation or moisture coming through? Or maybe panels that don't quite line up perfectly? Like I said, you can only see it in the correct lighting, most of the time it's not noticable and doesn't crack the drywall. Just curious. I'm sure the age of the house has something to do with it. Thanks.

ANGELofDEBT User is Offline

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Posts:60

08 Dec 2010 08:34 AM
Are you sure these aren't drywall seams you are seeing? It seems strange that you can "see" the SIPs lines through the drywall. Unless of course the drywall seams line up with the SIP panels.

smartwall

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08 Dec 2010 08:38 AM
It shows heat loss. It happens in homes that have been around for a while. You can see the nails in the ceiling because they draw the dust in the air.

cmkavala

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09 Dec 2010 08:00 AM

09 Dec 2010 07:57 AM
It is a common thing with older OSB SIPs, the solid 2x splines have greater thermal transfer at the joint, I have also noticed if they got a little wet during construction the joint edge may have flared up some and makes the joints telegraph thru. I don't beleive it is any kind of structural issue

09 Dec 2010 07:57 AM
It is a common thing with older OSB SIPs, the solid 2x splines have greater thermal transfer at the joint, I have also noticed if they got a little wet during construction the joint edge may have flared up some and makes the joints telegraph thru. I don't beleive it is any kind of structural issue

It is a common thing with older OSB SIPs, the solid 2x splines have greater thermal transfer at the joint, I have also noticed if they got a little wet during construction the joint edge may have flared up some and makes the joints telegraph thru. I don't beleive it is any kind of structural issue

Chris Kavala<br>[email protected]<br>1-877-321-SIPS<br />

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