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


Thread Tools Search this Thread
Unread 01-01-2009, 06:53 PM   #1
Registered User
Renboy's Avatar
Join Date: Dec 2008
Location: Guelph, Ontario, Canada
Posts: 1
basic general install questions

Hi all. This is my first post here, but have done a lot of reading on this site in the last few weeks. I have to be honest and say I'm quite impressed with this forum. I've spent a lot of time on car forums, but it's nicer here since people can respectfully disagree without it turning into a flaming war.

I'll be putting 18"x18" travertine tiles in my kitchen/hallway/entrance and powder room in the next couple of days but have some questions that I hadn't come across. Subfloor is 3/4 t/g osb on 2x10" with 16" centres and the longest span is about 12'. The deflecto is short of the L/720, but when I finish my basement in the summer I'll be putting a support header under the longest section bringing it to under 10'. My plan is as follows:
1/2" plywood screwed to the osb (no predrilling, 400sft = a lot of holes)
1/4" cbu screwed into the plywood over a bed of the cheapest unmodified thinset I can find
self-leveler to fill in any low spots
tiles & grout (1/8" lines)

My questions are:
What length/size of screws for the plywood -> osb?
What size of bead for the unmodified thinset under the cbu?
Should I seal the tops of the tiles before I lay them to save myself trouble grouting? And if so, how imperative is it to keep the sealer off the sides of the tile where the grout will be? The tiles are filled/honed and NOT polished if that makes a difference.
Is the self-leveller at HD any good? Anyone have any recommendations on a better (hopefully cheaper) leveller readily available in Canada?
Any other general comments/concerns?

As a side note, I decided against ditra...actually, I planned on using it, until I saw the price and my wallet decided against it. I have some spare time, no one has some spare money.

Renboy is offline   Reply With Quote
Sponsored Links
Unread 01-01-2009, 07:11 PM   #2
Brian in San Diego
AC Specialist -- Schluterville Graduate
Brian in San Diego's Avatar
Join Date: Oct 2005
Location: La Quinta, CA and Usk, WA
Posts: 10,791

I'd be a little concerned about putting the header up after the stone is installed. My concern would be in putting too much upward force on the joist structure above while installing the header.

I use 1 1/4 - 1 1/2" deck screws for attaching underlayment to subfloor. There's a thread in the Liberry about CDX, plywood, etc. There's an excellent article in post #3 of that thread. I highly recommend reading it.

I believe most of the manufacturer's recommend using a 1/4x1/4 square notch trowel for thinset under backer board.

I would not use SLC just to fill in low spots...unless the dips were severe. You can skim those areas with thinset.

I have set travertine and limestone and I sealed prior to grouting. If you are careful (which you should be at $50 a quart) you won't get much on the edges. I applied it with a paint brush. If I were doing as much square footage as you are talking about I'd probably use one of those skinny paint rollers.

If that doesn't work, I'll always think it should have.
Brian in San Diego is offline   Reply With Quote
Unread 01-01-2009, 11:29 PM   #3
Retired Moderator -- Wisconsin Tile Man & Musky Guide
muskymike's Avatar
Join Date: Apr 2004
Location: Springbrook WI
Posts: 16,083
Send a message via Yahoo to muskymike
Hi Rene, welcome! What Brian said.
Musky Mike
Corrado Custom Tile
Kerdi Shower Specialist
Dreams are like tasting a little bit of the future today. Keep dreaming and it will come true.

New here? Check this out.

muskymike is offline   Reply With Quote

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

All times are GMT -6. The time now is 10:41 PM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC