Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-28-2008, 10:33 AM   #1
weekend warrior
 
Hobb3s's Avatar
 
Join Date: Apr 2008
Location: Ottawa, Ontario
Posts: 92
Rewards Points: 0
Share |
Default

Prime subfloor or not?


I'm in the process of getting the bathroom floor ready for tiling and tub installation.
I've laid down new plywood over the floorboards, and I'm at the point where I'm ready to lay down the cement backer board. I've read that the best way to do this is to lay a layer of thin set then place the board down and screw it in, then do the joints with tape and thin set.
My questions is this.. should I prime the plywood subfloor before applying the thin set? Any special kind of primer, if so?

I've read that you should to get proper adherence, however most instructions I've read don't even mention it.

Thanks.

Hobb3s is offline   Reply With Quote
Old 05-01-2008, 03:18 PM   #2
Advice worth 2 cents!
 
Join Date: Mar 2008
Location: Quebec, Canada
Posts: 229
Rewards Points: 0
Default

Prime subfloor or not?


DO NOT PRIME THE PLYWOOD!!!!

I'm assuming you've done your homework and your sub floor is strong enough for tile (1 1/4" plywood, cement board does not add sturdiness). Your right about the thinset, if you use a top quality product that is modified it will stick well to the plywood.

You should always check the data sheets on the products you buy, go to the manufacturers web-site and check them out!

- pete

__________________
---pete
HandyPete is offline   Reply With Quote
Old 05-01-2008, 10:01 PM   #3
Remodeling Pro
 
Join Date: Mar 2008
Location: Lancaster County, PA
Posts: 16
Rewards Points: 0
Blog Entries: 2
Default

Prime subfloor or not?


Whether you nail or screw the underlayment to the subfloor make sure your screws or nails are no longer than the thickness of the underlayment plus the subfloor.

You don't want to tie the underlayment into the framing beneathe the subfloor.

As far as priming, no way. Most flooring installers using any type of adhesive(in this case thinset) will throw a hissy fit if there is paint on the substrate.
orson is offline   Reply With Quote
Old 05-02-2008, 09:35 AM   #4
weekend warrior
 
Hobb3s's Avatar
 
Join Date: Apr 2008
Location: Ottawa, Ontario
Posts: 92
Rewards Points: 0
Default

Prime subfloor or not?


Thanks for the responses guys. I've already laid the plywood and the cement board down on the floor. I didn't prime the plywood, just purchased a high quality mortar. I think I 'did it right'.
Mortar was an interesting learning curve, I wasn't too tough to mix properly, but definitely trickier to spread well than I expected. But overall I would consider the laying of the floor and underlayment a success. Next it's on to the tub install and then the walls go up!
Hobb3s is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Bath Remodel- Prime then Mud, or Vice Versa steve65 Painting 11 02-28-2008 12:54 PM
Prime before patching on drywall? DIYScott Remodeling 3 09-28-2007 09:19 PM
Is it nessessary to prime? sflamedic Painting 18 03-23-2007 08:38 PM
fresh sheetrock, prime? jamesdart Painting 3 02-25-2007 06:22 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.