Backerboards & Gaps In The Subfloor - Flooring - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Flooring

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 04-09-2006, 10:18 AM   #1
Newbie
 
Join Date: Apr 2006
Posts: 2
Rewards Points: 10
Default

Backerboards & gaps in the subfloor


We tore up vinil & 1/2 inch plywoods and then hardwoods. So we are now down to subfloor on a 90+ year old house and are planning on putting down tile. Went to a store & picked up 1/2 inch hardibacker board and want to start laying it down. I have one concern about us putting the boards down-there are some gaps between the boards-is that OK? or should we do something else before putting thin-set & screwing in the backerboards. Thanks!

Advertisement

sergv is offline   Reply With Quote
Old 04-09-2006, 12:35 PM   #2
Member
 
Join Date: Feb 2006
Posts: 334
Rewards Points: 250
Default

Backerboards & gaps in the subfloor


What sustrate is ther now, are you talking about plank flooring or plywood sheets?, all backerboards have to be installed over plywood or OSB, never over demensional lumber.

Advertisement

R&D Tile is offline   Reply With Quote
Old 04-09-2006, 09:15 PM   #3
IHI
Member
 
Join Date: Mar 2005
Location: central iowa
Posts: 55
Rewards Points: 75
Default

Backerboards & gaps in the subfloor


I always try to get at least a 1"-1/14" base prior to installing the thin set and backer board. So assuming your dealing with the typical old diagonal 1x subfloor, install new 1/2" plywood with screws in each joist, then install your thin set and lat down the backer board.

Kinda of a rough idea since we dont know exactly what your dealing with, but a push in the right direction none the less.
__________________
Website
IHI is offline   Reply With Quote
Old 04-10-2006, 06:48 PM   #4
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,491
Rewards Points: 2,630
Default

Backerboards & gaps in the subfloor


Actually 3/4" ply would be better and it must be exterior grade. DO NOT fasten it to the joists, only fasten it to the existing subfloor material. Same goes for the cement board, don't fasten it to the joists and be sure to stagger all CBU joints with the plywood joints so that one never matches up with another. The cement board (CBU) is what gets set into the fresh thinset and you don't want to use pre-mixed thinset for any reason. Leave a 1/4" gap around the perimeter of the area for expansion.
Bud Cline is online now   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need guidance on subfloor problems in new home. wb1026 Flooring 9 10-06-2009 07:29 AM
subfloor question for hardwood installation metrokarl Flooring 2 05-16-2007 09:37 AM
BAthroom Subfloor Blaze25 Flooring 3 11-17-2006 10:06 AM
subfloor for laminate and tiles mf915 Flooring 10 05-18-2006 05:01 PM
COMPLETE subfloor removal alexschmidt Flooring 4 08-03-2005 12:15 AM




Top of Page | View New Posts