Cracked Long Rim Joist - Fix, Reinforce, Ignore, Pray? - Building & Construction - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 01-29-2013, 08:54 AM   #1
Join Date: Aug 2011
Posts: 31
Rewards Points: 25

Cracked long Rim Joist - Fix, Reinforce, Ignore, Pray?

I have been prepping the basement for a music room and came across yet another "missed by the inspector" issue. I'm removing the fiberglass batt from the sill/rim and found a 5-6 foot section of rim joist cracked and/or bowed in. By my measurement, the max 'collapse' is just under 1/2". - this explains the cracks in the living room above that we just chalked up to buying an old house -

Home built 1940. One story with attic. Cinderblock foundation. Some previous shifting but stable after exterior dug and waterproofed 10yrs ago. Generally solid. While the rim joist does show some discoloration and streaking, I have had zero evidence of any dampness issues. This is surely from some time in the past before the house was sided and sealed. Sill plate is solid. Joist shows no rot. Probed it with awl and feel solid.

The area above the deflection and crack is few feet of wall and then window.

With the deflection, I can't see pounding a 9.5" joist up in there to reinforce. What the hell are my options? I was thinking of custom cutting a 2x10 to match the contour of the current situation and then snugging it up / nailing it. (although with the bow, I can't get it right up against it. With a solid sill to sit on (say that 3 times fast), it would at least provide some stability and stop the bow.

- It looks like this may have been an issue for a long time, as there is a secondary joist noted in the one pic. Although, this is under the entry way from the porch, so maybe that is part of std construction? Wood is same species/color/age, it seems.

Am I on track?



jefferyscott is offline   Reply With Quote
Old 01-29-2013, 09:03 AM   #2
DIY staff

Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 25,728
Rewards Points: 7,174

The crack is a heart check and has little affect on the rim joists strength---

The bowing was caused by water infiltration in the past--and the nature of that particular board---

It's not to big an issue as I see it from the pictures----Adding some upright blocking might be warranted--but I think,as long as the water issue is solved---leaving it alone will not lead to any future settling.


New members: Adding your location to your profile helps in many ways.--M--
oh'mike is offline   Reply With Quote
Old 01-29-2013, 09:10 AM   #3
Join Date: Aug 2011
Posts: 31
Rewards Points: 25

Thank you.

My biggest concern is that this is supporting the exterior wall, right?

There has been no more cracking / recracking of the walls since we moved in 1.5 yrs ago and had everything filled / caulked / painted. I guess I'll do some bracing for pc of mind and then just passively obsess over it for the next ten years in the back of my mind.
jefferyscott is offline   Reply With Quote

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
rotted rim joist powderhogg01 Building & Construction 5 08-05-2012 09:55 PM
Supporting joist under cracked tile JT31 Building & Construction 2 08-26-2010 08:00 AM
Jacking and Sistering Floor Joist Captain.Sassy Building & Construction 17 08-11-2010 01:30 PM
Cracked plaster from new roof. How long do I wait to repair? meltdowndave Building & Construction 3 10-17-2009 10:17 PM
replacing rotted sill plate and rim joist behind a deck ledger board tommyt Building & Construction 2 08-11-2008 07:38 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1