Need Help 2 subfloor issue

Reply

  #1  
Old 07-13-15, 11:22 AM
N
Member
Thread Starter
Join Date: Jul 2015
Location: United States
Posts: 5
Received 0 Votes on 0 Posts
Need Help 2 subfloor issue

I just bought this house.....I am upgrading the mudroom that connects the garage to the house When I peeled back all the carpet 1/2 my subfloor was cement, the other half plywood. ugh

Ok now I want to do ceramic tile in the mudroom but I have a few problems. If I add Hardie board or Wonderboard to the plywood side then that side will be higher then the slab side. I thought about ripping out Plywood, but it goes underneath all the wall framing and that seem to be way too much work. I know everyone says not to put Hardie Board on top of cement.....but I need to find a way to level floor and strengthen the plywood side so the thinset/mortar doesn't crack. Any ideas
Name:  IMG_5678.jpg
Views: 116
Size:  35.4 KB
 
Sponsored Links
  #2  
Old 07-13-15, 11:28 AM
S
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,571
Received 94 Votes on 83 Posts
Welcome to the forums.

Let's start at the basics - what's the composition of the plywood floor plus the size, spacing and unsupported span of the floor joists?
 
  #3  
Old 07-13-15, 11:50 AM
N
Member
Thread Starter
Join Date: Jul 2015
Location: United States
Posts: 5
Received 0 Votes on 0 Posts
Sorry 3/4 Ply 16" on center

no moisture issues, nothing on Plywood or concrete

The entire plywood part is about measure 8'2" from slab to wall and 5'6" wide
The portion with slab is about half as large
 
  #4  
Old 07-13-15, 11:59 AM
S
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,571
Received 94 Votes on 83 Posts
What size are the joists? Which of the two measurements you provided is their span or is it something else?
 
  #5  
Old 07-13-15, 12:01 PM
N
Member
Thread Starter
Join Date: Jul 2015
Location: United States
Posts: 5
Received 0 Votes on 0 Posts
Joist are 2 x 4
span is 5"6"
 
  #6  
Old 07-13-15, 12:05 PM
N
Member
Thread Starter
Join Date: Jul 2015
Location: United States
Posts: 5
Received 0 Votes on 0 Posts
Sorry 2 x 6 joist not 2 x 4
 
  #7  
Old 07-13-15, 12:36 PM
czizzi's Avatar
Member
Join Date: Jul 2007
Location: USA
Posts: 7,388
Received 14 Votes on 12 Posts
Which is toward the house, and which is toward the garage? The easiest to raise the concrete is with self leveling compound. You roll on a self leveling primer, let it set up (2 hrs) and then pour on the self leveling compound. It comes in a powder and you mix it with water. Pour it on and then help push it into place. It sets up relatively quickly, so work efficiently.
 
  #8  
Old 07-13-15, 12:42 PM
N
Member
Thread Starter
Join Date: Jul 2015
Location: United States
Posts: 5
Received 0 Votes on 0 Posts
the door leads to garage if I used self leveling compound I would have to pour it 1/4 deep is that even possible?? I thought the compound was just for filling in dips in the floor not covering the entire floor
 
  #9  
Old 07-13-15, 01:02 PM
czizzi's Avatar
Member
Join Date: Jul 2007
Location: USA
Posts: 7,388
Received 14 Votes on 12 Posts
Depending on the brand, you can make single pours with SLC thicker than that. Maximum thickness will be called out on the label, and again, it varies by brand. Level the floor to the plywood and then you can run ditra over the whole floor to tie them both together as one.
 
  #10  
Old 07-13-15, 02:44 PM
J
Member
Join Date: May 2007
Location: USA
Posts: 1,607
Received 0 Votes on 0 Posts
We never learned if the floor's perfectly even at the junction. Might be able to avoid a step if it's the same and otherwise in good shape.

Jaz
 
Reply
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


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: