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 04-11-2011, 08:48 PM   #1
Member
 
Join Date: Apr 2007
Posts: 2,269
Rewards Points: 6
Share |
Question

screwing hardiebacker on top of subfloor


if i am screwing hardiebacker on top of 3/4" subfloor, should i still be aiming for joists underneath or can i screw it into subfloor only ?

i was thinking the former, which is certainly firmer, because all the screws available at HD were 1-1/4 and 1-5/8", which would both protrude on the other side if using 1/4" hardiebacker and screwing into subfloor only.

amakarevic is offline   Reply With Quote
Old 04-11-2011, 09:44 PM   #2
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,173
Rewards Points: 26
Default

screwing hardiebacker on top of subfloor


Subfloor only. But First: What is the subfloor made of?

__________________
XXX
Bud Cline is offline   Reply With Quote
The Following User Says Thank You to Bud Cline For This Useful Post:
amakarevic (04-11-2011)
Old 04-11-2011, 10:21 PM   #3
Member
 
Join Date: Apr 2007
Posts: 2,269
Rewards Points: 6
Question

screwing hardiebacker on top of subfloor


it is 23/32" OSB pannel. but does it matter if i do go into the joists only? because any screw they have available at HB will protrude on the other side and i have a personal screw/nail policy of never protruding.
amakarevic is offline   Reply With Quote
Old 04-11-2011, 10:26 PM   #4
Member
 
Join Date: Mar 2007
Location: Long Island, NY
Posts: 9,519
Rewards Points: 0
Default

screwing hardiebacker on top of subfloor


Quote:
Originally Posted by amakarevic View Post
it is 23/32" OSB pannel. but does it matter if i do go into the joists only? because any screw they have available at HB will protrude on the other side and i have a personal screw/nail policy of never protruding.
Then screw it into a joist so your personal policy isn't at risk.
Ron
Ron6519 is offline   Reply With Quote
The Following User Says Thank You to Ron6519 For This Useful Post:
amakarevic (04-11-2011)
Old 04-12-2011, 05:00 PM   #5
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,173
Rewards Points: 26
Default

screwing hardiebacker on top of subfloor


The industry recommendation is to NOT screw into the floor joists in this case. However, we wouldn't want to violate any personal policy you may have, what does the industry know about the subject anyway. Screw into the joists if you must.
__________________
XXX
Bud Cline is offline   Reply With Quote
Old 04-12-2011, 05:05 PM   #6
DIY staff
 
Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 21,655
Rewards Points: 70
Default

screwing hardiebacker on top of subfloor


I believe the screw pattern for Hardibacker is about every 8"---I suggest you add extra Joists to avoid the protrusion problem.
__________________
New members: Adding your location to your profile helps in many ways.--M--
oh'mike is online now   Reply With Quote
Old 04-12-2011, 05:22 PM   #7
Member
 
Join Date: Apr 2007
Posts: 2,269
Rewards Points: 6
Question

screwing hardiebacker on top of subfloor


Quote:
Originally Posted by Bud Cline View Post
The industry recommendation is to NOT screw into the floor joists in this case.
but why ? what does extra firmness hurt ?
amakarevic is offline   Reply With Quote
Old 04-12-2011, 05:25 PM   #8
Remodeler
 
Join Date: Jan 2011
Location: Iowa
Posts: 239
Rewards Points: 2
Default

screwing hardiebacker on top of subfloor


Most any type of underlayment requires closer fastener spacing than joist spacing. I usually go with a 6-8 inch grid spacing over the entire sheet. Too close is much better than too far apart! If you are installing backer to tile over you should also be laying the backer in a bed of thinset.

Tile is expensive, lots of work to install and even harder to tear out, you want to get it right. If you absolutely don't want it to protrude then use a thicker product or find shorter screws.
iamrfixit is online now   Reply With Quote
Old 04-12-2011, 05:29 PM   #9
Member
 
Join Date: Apr 2007
Posts: 2,269
Rewards Points: 6
Question

screwing hardiebacker on top of subfloor


this is for a boiler/water heater alcove. both gas. i really don't have to make it look pretty. i did not put a bed of thinset. is there any flooring alternative to tile to go under these appliances that will provide sufficient heat insulation ? this is on the 1st floor, there is a basement underneath.
amakarevic is offline   Reply With Quote
Old 04-12-2011, 07:23 PM   #10
Tileguy
 
Bud Cline's Avatar
 
Join Date: Mar 2006
Posts: 10,173
Rewards Points: 26
Default

screwing hardiebacker on top of subfloor


Quote:
is there any flooring alternative to tile to go under these appliances that will provide sufficient heat insulation ?
No none!

Quote:
i did not put a bed of thinset.
Oh-oh!

Quote:
i really don't have to make it look pretty.
Not to worry - it ain't gonna!

How about using 1/2" Hardi, the cost is the same is it not? Whoops, never-mind it is already installed, huh!
__________________
XXX
Bud Cline is offline   Reply With Quote
The Following User Says Thank You to Bud Cline For This Useful Post:
amakarevic (04-12-2011)
Old 04-12-2011, 11:40 PM   #11
Member
 
Join Date: Apr 2007
Posts: 2,269
Rewards Points: 6
Default

screwing hardiebacker on top of subfloor


good to know for the powder room cause that's next and that needs to look purty, unlike the alcove. if the tiles crack there, i don't really care. it was a good learning ground.

amakarevic 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
Screwing down subfloor & crowned joist? roar24 Flooring 1 03-20-2011 04:27 PM
Hardiebacker/ Floor Tiling question.......remaking the "BOMB SHELTER!" Dyoung Building & Construction 5 03-20-2010 09:09 AM
Need guidance on subfloor problems in new home. wb1026 Flooring 9 10-06-2009 06:29 AM
Spacing for screwing subfloor. Clutchcargo Building & Construction 3 10-05-2008 09:04 PM
Subfloor / underlayment question... scheenstra Flooring 7 02-21-2008 07:39 AM




Top of Page | View New Posts

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