Backerboard thickness for tile floor?


  #1  
Old 01-27-17, 01:26 PM
O
Member
Thread Starter
Join Date: Oct 2012
Location: usa
Posts: 91
Upvotes: 0
Received 0 Upvotes on 0 Posts
Backerboard thickness for tile floor?

i currently have a 1/2 inch ply floor in bathroom + a 1/4 inch ply over the 1/2 where by old vinyl flooring was. if i rip up the 1/4ply and lay down 1/4 backerboard will that be sufficient for applying tile? thanks
 
  #2  
Old 01-27-17, 02:05 PM
S
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 20,233
Received 1,182 Upvotes on 1,140 Posts
Probably not. What's the size, spacing and unsupported span of the floor joists?

Ceramic/porcelain or natural stone tile?
 
  #3  
Old 01-28-17, 06:50 AM
Marq1's Avatar
Member
Join Date: Sep 2016
Location: USA MI
Posts: 9,951
Received 1,057 Upvotes on 959 Posts
Every tile is different, you have to refer to the manufactures guidelines.

A "general" guideline is 1 1/4" thickness of solid flooring.
 
  #4  
Old 01-28-17, 07:30 AM
J
Member
Join Date: Jan 2011
Location: USA
Posts: 5,006
Received 125 Upvotes on 110 Posts
1/2" is too thin.
Also what's the size, spacing and free spans of the joist?
Tiles a one shot deal if you want it to not crack.
 
  #5  
Old 01-28-17, 08:17 AM
O
Member
Thread Starter
Join Date: Oct 2012
Location: usa
Posts: 91
Upvotes: 0
Received 0 Upvotes on 0 Posts
total bathroom size is 80x 60

tile area is 60x60

i plan on using a 12x12 ceramic tile.

i don't actually have the floor pulled up, but based on the nail lines it looks like 16" gaps

What would be your recommendations on how to proceed with flooring? do i add another 1/2 ply and 1/4 backerboard although I currently only have just short of 1/2 from floor to top of door threshold.
Could i get away with taking out the top 1/4 layer and adding 1/2 backerboard? I'd prefer not to have a big rise into bathroom from hallway. thanks

Name:  floor.jpg
Views: 1358
Size:  45.2 KB
 
  #6  
Old 01-28-17, 09:02 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,964
Upvotes: 0
Received 9 Upvotes on 8 Posts
Bear in mind backer does not add strength needed to the flooring. If that is 1/2", then another 3/4" is recommended plus 1/4" backer. You may have to threshold the doorway, but it will be a more solid floor in the long run. And, yes, remove the 1/4" first.
 
  #7  
Old 01-28-17, 02:08 PM
S
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 20,233
Received 1,182 Upvotes on 1,140 Posts
Biggest mistake in installing tile is get hung up on the difference in height created by the proper substrate.
 
  #8  
Old 01-29-17, 08:11 AM
czizzi's Avatar
Member
Join Date: Jul 2007
Location: USA
Posts: 7,388
Received 15 Upvotes on 13 Posts
You can cut material off the bottom of the door to clear the new tile floor, done all the time.

1/2" ply + 3/4" ply + thinset + 1/4" backer board + Tile would be the optimal sandwich.
 
 

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