How To Repair Floor Joist When Sistering Is Not An Option - General DIY Discussions - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > DIY Forum > General DIY Discussions


Thread Tools Display Modes
Old 06-05-2009, 09:07 AM   #1
Join Date: Jun 2009
Posts: 1
Rewards Points: 10

How to repair floor joist when sistering is not an option

My 1951 house sits on a crawlspace. The floor joists were set within notches or pockets in the block foundation wall. Old water damage caused many of the joist ends to rot and decay within the pockets causing the the floor to sag and bounce. The rot exists mostly on the joist ends within these pockets - with good, solid wood for most of the length of the joist. I can't just sister the damaged joists, becasue the foundation wall pockets are only wide enough for a single joist. My options are 1) cut off the bad end of the joist, replace with goo0d wood and sandwich between wood or steel, 2) enlarge the pocket in the foundation wall to accept a second sister joist, 3) build piers and a ross beam a foot away from the foundation wall to support the joists. It all sounds ok on paper, but it's located in a crawlspace with maybe 32" or working height. Has anyone seen and fixed a similar problem? - jmagee3d


jmagee3d is offline   Reply With Quote
Old 06-05-2009, 02:12 PM   #2
Join Date: Mar 2007
Location: Long Island, NY
Posts: 11,188
Rewards Points: 5,336

I would enlarge the block pocket and line it with something like ice and water shield to keep moisture away and use a pressure treated joist.
Carraige bolt(1/2") the two together with construction adhesive in the middle.
32" is a massive crawlspace. Count yourself lucky.


Ron6519 is offline   Reply With Quote
Old 06-05-2009, 02:33 PM   #3
Registered User
Join Date: Mar 2009
Posts: 11,730
Rewards Points: 526

Is a pressure treated ledger under the joists an option? Bolted or lagged to the block, with p.t. blocking to prevent rotation. Be safe, G
Gary in WA is offline   Reply With Quote

fxing floor joists

Thread Tools
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
Choosing a Refrigerator based on Repair Value 1655graff Appliances 5 03-01-2011 08:49 AM
AC repair am I being scammed 911 hurley0351 HVAC 55 05-18-2009 08:14 AM
Fire repair detroitguy66 Building & Construction 3 08-20-2008 05:49 AM
Ceiling Drywall Repair Question kennykenny Building & Construction 6 12-30-2007 09:18 AM
Edge of roof deteriorated, how to repair? (pics) diymonkey Roofing/Siding 3 06-23-2007 01:02 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1