I am seeing a lot of coffered ceilings lately from DE, so I wanted to get some feedback from members that have done it. I was a little concerned with the weight and if the trusses above would be able to hold it on top of DD & GG. I assumed the clips were good, but then I read this exchange over in Dave's kinetic-river-cinema
Originally Posted by fax6202
Quote: Originally Posted by BllDo
So what does all that weight do to the clips and channel on the ceiling? Is there any potential for sag at some point and does it affect the acoustic properties of the clips?
Turns out you were on to something. After talking to Ted this morning I have decided to take down the OSB I have on the ceiling. It actually came down in about a half hour. What I need to do is decrease my clip spacing from 48" to 32". It was this option or I could have decreased the channel spacing from 24" to 16". I chose the former. It sucks as i thought that the ceiling would be fine to handle the distributed weight of the coffers.
So the channel and clip configuration is designed to support around 4.5lbs per sq/ft. The weight of OSB, GG, and 5/8 drywall is right at that limit if not a bit over. I just didnt want to take the chance of the ceiling sagging in the future, plus I will sleep better and wont stare at the ceiling everytime I look up.
Additional clips and GG should be here on Monday/Tuesday and then I will knock out both layers and get this portion of my build done.
My clip spacing was spec'd for 48". Channels were 24" apart. According to Ted that is just enough for the clips to hold the GG & DD, but not enough for additional weight for a coffered ceiling. Dave ended up taking his ceiling down, and Ted approved. Wondering if I need to do the same?
Also, FWIW on the framing plans, even though the plans do not show blocking in the stud walls, it is needed. This is one area where "follow the plans exactly" needs to be ignored. Dennis said not having the blocking compromised the soundproofing and rendered the room unsuitable for playback. He later said that attaching the soffits, wainscotting, columns, etc to the wall would help stiffen them and I should be ok.
I had considered taking everything down to fix the framing. Their prices for millwork on the columns, wainscotting, and chair rail made the price to build the room very high. I would rather not have to add all that stuff to the walls to stiffen it & make it work. If my wall framing was ok, I could skip the woodwork and do a fabric based room which would be much cheaper to build. It seemed like a waste though, after spending $30k to drywall the room. But if the ceiling clips can't hold the coffered ceiling that the plans call for, then that would be more reason to just tear it all out and start restart from scratch.
Has anyone else done an EG plan with clip spacing presumably the same as mine then added GG + DD + coffered ceiling without any issues? Is Ted wrong or are my plans wrong?