|
Sat, Oct 30, 10 at 15:53
| Last week I was in the crawlspace underneath the bedroom addition and noticed daylight shining in. After picking out a piece of the loose mortar, I saw that there exists about a 5/8" gab between the original (1930) concrete block basement foundation and the add-on (1980?) concrete block crawlspace foundation. Someone had attempted to put mortar in the gap, however due to settling or concrete shrinkage this was now loose, leaving gaps or outright falling out.
What is the best approach to use to fill the gap? It's letting in a fair amount of cold, and is a possible path for rodents as well. I've seen some talk of polyurethane or semi-rigid epoxy sealers, but am not sure of the best approach. |
Follow-Up Postings:
|
| Polyurethane caulking. |
|
| Thank you--will get some and will try it out! |
|
| I have used "Great Stuff" , its messy and hard to work with, requiring much prep and planning, but it works well and is very durable. But for a 5/8" gap, I dont know. The caulking is much easier to work with and looks better. |
|
- Posted by jennifer_in_kansas (My Page) on Tue, Nov 16, 10 at 12:03
| Spray foam works great, too |
|
| Foam backer rod and polyurethane caulk will easily fill the gap (backer rod is much cheaper then the caulk). There is no reason to fill more than a a small portion on each side. |
Please Note: Only registered members are able to post messages to this forum. If you are a member, please log in. If you aren't yet a member, join now!
Return to the Basements Forum
Instructions
- You must be a registered member and logged in to post messages on our forums.
- Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review the contents and make changes.
- After posting your message, you may need to refresh the forum page in order to see it.
- It is illegal to post copyrighted material without the owner's consent.
- HTML codes are allowed in the message field only.
- No advertising is allowed in any of the forums.
- If you would like to practice posting or uploading photos, please visit our Test forum.
- If you need assistance, please Contact Us and we will be happy to help.