Ceramic Tile Advice Forums - John Bridge Ceramic Tile

Welcome to John Bridge / Tile Your World, the friendliest DIY Forum on the Internet


Advertiser Directory
JohnBridge.com Home
Buy John Bridge's Books

Go Back   Ceramic Tile Advice Forums - John Bridge Ceramic Tile > Tile & Stone Forums > Tile Forum/Advice Board

Sponsors


Reply
Thread Tools Search this Thread
Unread 03-10-2021, 07:53 AM   #166
ss3964spd
Moderator
 
ss3964spd's Avatar
 
Join Date: Jul 2005
Location: Fairfax, Va
Posts: 4,203
Send a message via Yahoo to ss3964spd
Adding a second layer of ply is about the only way to make up for the between joist deflection deficiencies of the first layer.

In your case, though, 1/2" ply will do the trick when properly installed. You want that 1/2 ply to have a face grade no lower than C, and be laminated with moisture resistant glue, typically referred to Exposure 1 or EXP 1. 1/2" B/C EXP1 ply is pretty common at the BBS's.
__________________
Dan
---------------------------------------------------------------------------------
If I recall correctly my memory is excellent, but my ability to access it is intermittent.
ss3964spd is offline   Reply With Quote
Unread 03-10-2021, 09:19 AM   #167
markch
Registered User
 
Join Date: Nov 2020
Location: Los Angeles, CA
Posts: 117
Then Lots of screws + construction adhesive between layers?
__________________
Mark
markch is offline   Reply With Quote
Unread 03-10-2021, 09:26 AM   #168
cx
Moderator emeritus
 
cx's Avatar
 
Join Date: Jul 2001
Location: Boerne, Texas
Posts: 92,819
Here is a good article from our Liberry showing what I consider the best way to install that second layer of plywood, Mark.

And no, Dan is not suggesting you glue the second layer to the first, he's pointing out the requirement that the second layer be an exterior glue type plywood. Use the mechanical fastener schedule shown in the article above. If you want to glue, do not use a construction adhesive from a tube. You would need a full spread of wood glue for that purpose and then only if the surface of your first layer of subfloor is plywood and in near pristine condition. Best to forego the glue all together, 'specially if you're starting with OSB as I suspect.

My opinion; worth price charged.
__________________
CX

Y'ALL NEW VISITORS READ THIS HERE!
cx is online now   Reply With Quote
Unread 03-10-2021, 01:41 PM   #169
markch
Registered User
 
Join Date: Nov 2020
Location: Los Angeles, CA
Posts: 117
VERY informative article -- "The idea presented herein is to have two layers of sheathing at those points where the bending stresses are greatest—over the joists."
__________________
Mark
markch is offline   Reply With Quote
Reply

Stonetooling.com   Tile-Assn.com   National Gypsum Permabase


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Waterproofing and Tiling a Drop-in Tub that in a shower. Jacob Smithg Tile Forum/Advice Board 1 11-03-2020 06:09 PM
Re-tiling/waterproofing old plaster walls tilenoobie0 Tile Forum/Advice Board 3 06-15-2019 09:18 PM
Need help waterproofing and tiling pool, not on concrete. njannsen Tile Forum/Advice Board 13 05-14-2014 03:29 PM
Method of Tiling Wall and Waterproofing? cb9209 Tile Forum/Advice Board 25 09-03-2010 06:02 AM
Waterproofing my shower walls before tiling pvrc24 Tile Forum/Advice Board 1 09-08-2009 03:00 PM


All times are GMT -6. The time now is 07:29 PM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC