sub-floor thickness help


  #1  
Old 08-17-15, 02:28 PM
S
Member
Thread Starter
Join Date: Aug 2015
Posts: 1
Received 0 Votes on 0 Posts
sub-floor thickness help

I am looking to install porcelain tile in my kitchen and great room.

My question is, do I need to add additional plywood for deflection.

My current subfloor is 1 1/8 inch thick, plywood.

My floor joists are 4 x 6, that are supported every four feet.

The distance between the joists is also every four feet.

I was going to use Ditra over the plywood, which I believe should be just fine, but I'm worried that I may need to increase the thickness of the sub-floor first.

Thanks in advance for any advice!
 
  #2  
Old 08-17-15, 02:45 PM
P
Temporarily Suspended
Join Date: Jul 2008
Location: NY
Posts: 10,982
Received 0 Votes on 0 Posts
  #3  
Old 08-17-15, 06:32 PM
J
Member
Join Date: May 2007
Location: USA
Posts: 1,604
Received 0 Votes on 0 Posts
I have no idea how that link is relevant the the question.

SSCMOC is located on the left coast where many homes are built in this unorthodox manner. The joists are 4x6" spaced about 48-50" o.c. and they span 48-50" o.c. There are no specs for that type of framing that I'm aware of. Best check with local experts to determine what the deflection specs are. The most critical is the deflection of the subfloor.

Saying that, I know that framing will work for ceramic tiles most of the time if done right. Is the subfloor ply one layer of 1 ⅛" or more than one layer? Is it in good shape with no large notches or holes? Any rot or sagging? It's always a good idea to add more ply if you can stand the added height. It should be fine with Ditra or even CBU.

Jaz
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: