What would you use for spacers with Durock?

[albertj03]

I just moved a stud in my basement that was too close to the flue collar on my chimney (metal piece where the stove pipe connects to the chimney). The stud is for the stairs coming down to the basement. I moved the stud back so it's plenty far away from the flue collar now and sured everything up good so the stairs are still supported correctly. While I was at it I decided to put some durock on the face of the stud. What should I use to fasten the durock to the stud and what should I use for spacers? Also, how much space do I need between the durock and stud? I've read that some people have just used drywall screws and metal washers but was wondering if there is an actual product out there that is meant for this type of application.

Thanks in advance.

 

[jtp10181]

Well if all the combustible materials meet clearances you do not need durock or any spacers, you could just put drywall there, or nothing. If you still want to attach durock, they do make special screws for it, but we usually just use drywall screws. If you think you need spacers for some reason, a ceramic spaces is proper so it does not conduct heat, but it does not sound like you need an air gap anyway.

 

[Sparkster]

If you really want to get anal about it, as I usually do, and have, is to use ceramic fence post spacers. These are about 1 1/4 long, 1" dia. and are used for electric fence wires.
I get them from my local old hardware store for about $4/ dozen.

Then to get really anal, I fastened the Durock through them with toggle bolts to the drywall, so they weren't attached to the studs at all.
After I did this, I read the Durock manual that says to just use two 1/2" layers, 4" wide, nailed over the studs.

You have to do what makes you comfortable.

 

[begreen]

The easiest way is use the durock itself to make furring strips. Just cut 3" wide strips off the end of a sheet. Double them up and you have the required 1" spacer.

(broken link removed to http://www.usg.com/USG_Marketing_Content/usg.com/web_files/Documents/Prod_Data_and_Submittal_Sheets/CB198_Durock_Cement_Bd.pdf)

 

[Dune]

I use these channel shaped things from the drywall-masonry supplier. I don't know what they are really for. I screw one top and bottom horizontaly, to the studs, then run three verticaly per sheet of duroc, with sheet rock screws.

 

[LLigetfa]

I use these channel shaped things from the drywall-masonry supplier. I don't know what they are really for. I screw one top and bottom horizontaly, to the studs, then run three verticaly per sheet of duroc, with sheet rock screws.

Resilient Channel or DWFC (DryWall Furring Channel) used for soundproofing?

I use a lot of 2" metal studs for furring or framing out chases.