Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Flooring

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 03-23-2012, 06:05 PM   #1
Newbie
 
Join Date: Mar 2012
Posts: 22
Rewards Points: 10
Default

Old House Bathroom Replacing/sistering Joists


I have a small bathroom (92x74) I recently gutted. (I have attached pictures) I pulled up the sub floor revealing 3 joists. They are notched into beams running perpendicular and they are 27" apart on center and each joist measures 4x3 (actual measurement). Under each joist there looks to be a second piece of wood that I assume is simply to connect the ceiling below and offers no structural support. One of the joists (the one near the toilet pipe) at some point rotted out and was "fixed" by some 2x3's around the base of the toilet and those also rotted out. (in the photo is may look like the middle joist is rotted as well, but that is actually the 2x3's used around the toilet. The middle joist is before it and in good shape.)

I removed a standard cast iron tub and I am replacing it with a 60x60 corner whirlpool tub.

So my questions:
1) Can I simply replace the rotted joist completely using a similar piece of wood notched the same way? (I am pretty sure whats left of that joist I could remove simply by lifting it up)

2) Should I sister all 3 of the joists, and if so how? (I'd assume I would use the metal joist hangers to connect to the main beams?, can metal hangers be used to sister into my existing notched beam?) or should I skip sistering them and just add additional joists in between the existing ones again using metal joist hangers? My concern is can the modern metal joist holders be safely attached to old school beams since they arent perfectly flat like modern lumber? Can the metal hanger be attached close enough to sister joists?


Thanks for any replies!
Attached Images
   


Last edited by Velvis; 03-23-2012 at 06:13 PM.
Velvis is offline   Reply With Quote
Old 03-23-2012, 11:59 PM   #2
Remodeling Contractor
 
Join Date: Dec 2008
Location: Sandy Hook, CT
Posts: 3,590
Rewards Points: 2,000
Default

Old House Bathroom Replacing/sistering Joists


metal joist hangers will work fine. These are available for one, two or three joists wide. remove the bad joists if possible.

Bob Mariani is offline   Reply With Quote
Old 03-24-2012, 12:04 AM   #3
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,518
Rewards Points: 4,152
Default

Old House Bathroom Replacing/sistering Joists


The joist you have now are way to far apart, Add one between each one.
joecaption is offline   Reply With Quote
Old 03-24-2012, 12:10 AM   #4
Remodeling Contractor
 
Join Date: Dec 2008
Location: Sandy Hook, CT
Posts: 3,590
Rewards Points: 2,000
Default

Old House Bathroom Replacing/sistering Joists


yes agreed.... I missed that 16" OC.... flooring should be 12" OC
Bob Mariani is offline   Reply With Quote
Old 03-24-2012, 01:39 AM   #5
Newbie
 
Join Date: Mar 2012
Posts: 22
Rewards Points: 10
Default

Old House Bathroom Replacing/sistering Joists


Ok, thanks for the tips.

Do you think replacing the damaged joist and placing two new joists between the existing 3 will be enough?

Or should I put two new joists between each existing joist?

There isnt enough room to put new joists on the outside of the number 1 and number 3 joists.

Also what type of wood should I use for the new joists?
Velvis is offline   Reply With Quote
Old 03-24-2012, 07:27 AM   #6
Remodeling Contractor
 
Join Date: Dec 2008
Location: Sandy Hook, CT
Posts: 3,590
Rewards Points: 2,000
Default

Old House Bathroom Replacing/sistering Joists


Kiln dried doug fir

no need to sister them 2X10 are enough
Bob Mariani is offline   Reply With Quote
Old 03-24-2012, 02:54 PM   #7
Newbie
 
Join Date: Mar 2012
Posts: 22
Rewards Points: 10
Default

Old House Bathroom Replacing/sistering Joists


I dont have the height for 2x10s. What about doubled 2x6s?

If doubled 2x6s are acceptable should I glue and screw them together first when using a double joist hanger?
To be clear the 2x6s would be in addition to the 3 existing 4x3 joists that are 27" O.C.

Also I need to replace the rotted joist that measures 4x3. Home Depot didn't have anything that size (They had something close but it was treated wood and rounded on the top and bottom), is there a place to purchase a replacement beam that measures 4x3? It needs to be that size to fit into the existing notches on the cross beams.


Last edited by Velvis; 03-24-2012 at 11:14 PM.
Velvis 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
multiple choice - basement bathroom venting debacle and burps denemante Plumbing 1 11-15-2011 11:50 AM
Old House Bathroom upgrade KBS Flooring 13 11-14-2011 01:01 PM
Bathroom in the pool house kybenz Plumbing 2 05-11-2011 05:52 PM
installing whole house filter on outside of house MikeInFL Plumbing 3 06-12-2010 05:47 PM
new bathroom old house pigman Building & Construction 2 08-28-2008 08:45 PM




Top of Page | View New Posts

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