lLeveling Ceiling Joists

John1

Is it best to use a laser or a sting to check the level of 24oc ceiling joist on 12X30' room ?
Old drywall is down and will use 1X4 strapping (perpendiculat) on 16 o.c.

Any hints on applying strapping/shimming and leveling would be much appreciated.

Thanks
John

silverstilts

The only way to go is RC channel or referred to as sound channel it will flatten out just about any ceiling and way easier to use than wood strips it will float unlike wood will follow the ceiling joist unless you shim . Sound channel you should not have to worry about using a string or laser unless it is really bad. It comes in 12' lengths. I use to use it on old plastered ceiling to straighten them out ... siverstilts , aka the rock doctor

silverstilts

Here is a picture of some channel. It wont add hardly any depth to your ceiling especially if you have low ceilings.

Attached Images

RC Channel.jpg (91.7 KB, 40 views)

John1

Thanks so very much, who would carry this?

John

silverstilts

I don't know where you live but any drywall supplier would have it , look at places like drywall supply or tamarack building materials , if not available go to a local lumber yard and have them order it although they usually are much higher priced.

Custom Drywall Svc.

yea......thank god for RC Channel.


...

John1

I am a little confused, how is the RC Channel hung??

Thanks so much
John

silverstilts

If you notice on the diagram letter C would go up against the wood perpendicular (#) to the joists. Just screw it up there with some 1-5/8" sheetrock screws into the wood , you may think it is a little flimsy just hanging there but don't be fooled after your rock is screw onto it it is very strong. A & B will face out away from the wood... You would only need 1' screws to screw the sheetrock on the channel or 1-1/4" ... and be sure to run the sheetrock perpendicular with the sound channel , not the other way this will increase the strength and flatten out the ceiling.

John1

Thanks so very much for your time.
I assume you use the "fine" thread sheetrock screws!!
About what do these cost?

Thanks Again
John

I will seek these out in the am as "strapping/shimming" with 1X4 is a pain.