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Goldensammy
Cypress, TX
Member since Jun 2016
415 posts

Filling Joints in Concrete Drive
The wood in expansion joints in driveway is nearing the end of its useful life and it looks like shite.

Best options for repair?


wickowick
LSU Fan
Head of Island
Member since Dec 2006
43985 posts

re: Filling Joints in Concrete Drive
I have used this stuff before with good results


LINK



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CatfishJohn
LSU Fan
Member since Jun 2020
5540 posts

re: Filling Joints in Concrete Drive
Why do they use wood? It looks terrible in my drive way too, just never understood the engineering reason for that material choice.


ConfusedHawgInMO
Arkansas Fan
Member since Apr 2014
2297 posts

re: Filling Joints in Concrete Drive
I just bought a few bags of paver sand and filled them up as best I could. Poured it in, tamped it down with a broom stick and sprayed it with some water. It's held up fine so far and any touchups I need to do are easy.


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HonoraryCoonass
LSU Fan
Member since Jan 2005
15169 posts

re: Filling Joints in Concrete Drive
I used Dap 3.0 Self-leveling, and a backer rod. You might not need backer rod.


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Guzzlingil
LSU Fan
Baton Rouge
Member since Dec 2003
1696 posts

re: Filling Joints in Concrete Drive
Use a self leveling sealant - and backer rod.

How many LFT and where are you located?


Lazy But Talented
DFW
Member since Aug 2011
13182 posts

re: Filling Joints in Concrete Drive
Like the other posters have said. Remove wood and Look into self leveling sealant.
This post was edited on 7/21 at 4:06 pm


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White Bear
USA Fan
NWLA
Member since Jul 2014
7947 posts

re: Filling Joints in Concrete Drive
Im considering new treated 1x4’s. The self-leveling rubber looks like shite and doesn’t seem to last long, and it’s expensive as hell.


cajuns td
LA-Lafayette Fan
Prairieville
Member since Jun 2019
100 posts

re: Filling Joints in Concrete Drive
LINK /

Father in law used this. Looks much nicer than self leveling sealant.


Guzzlingil
LSU Fan
Baton Rouge
Member since Dec 2003
1696 posts

re: Filling Joints in Concrete Drive
I sell the SL sealants. They are not expensive.


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C-Bear
LSU Fan
A Texas Tiger
Member since May 2005
645 posts

re: Filling Joints in Concrete Drive
We used Slab Gasket. Super easy to install once you get the rotten wood out of the expansion joint.


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White Bear
USA Fan
NWLA
Member since Jul 2014
7947 posts

re: Filling Joints in Concrete Drive
quote:

I sell the SL sealants. They are not expensive.
They are at HD etc.! Based on what I would need .


LSUengr
LSU Fan
Baton Rouge
Member since Sep 2005
1725 posts

re: Filling Joints in Concrete Drive
quote:

Why do they use wood? It looks terrible in my drive way too, just never understood the engineering reason for that material choice.


No engineering reason. It was cheap and resisted rot and decay when it used to be real redwood. Now they have sapwood in them and they don't last as long. Much better materials out there now to use as expansion joint filler.

As an engineer who designs parking lots and streets, you shouldn't have expansion joints in you driveway anyway. You should have sawcut joints or keyway to control cracking, but no expansion joints. Only in rare instances in the south will your concrete ever be longer than the day it was poured. Expansion joints just become a place for water infiltration that leads to quicker deterioration of pavement.


Unobtanium
LSU Fan
Baton Rouge
Member since Nov 2009
841 posts

re: Filling Joints in Concrete Drive
Remove the top 1" of wood, then backer rod and Sikaflex.


Goldensammy
Cypress, TX
Member since Jun 2016
415 posts

re: Filling Joints in Concrete Drive
quote:

How many LFT and where are you located?


Maybe 200 LF. NW Houston, Cypress to be more specific.


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Nicky Parrish
Member since Apr 2016
5622 posts

re: Filling Joints in Concrete Drive
quote:

As an engineer who designs parking lots and streets, you shouldn't have expansion joints in you driveway anyway. You should have sawcut joints or keyway to control cracking

Would it be wise to, after cleaning out rotting expansion joints gaps to fill with cement.
Thus would be for a slab under a carport.
The slab was poured 35 years ago and some of the wood is starting to rot.
South East Louisiana, Lafourche Parish.
Thanks


lsu777
LSU Fan
westlake
Member since Jan 2004
18077 posts

re: Filling Joints in Concrete Drive
quote:

Remove the top 1" of wood, then backer rod and Sikaflex.



as an engineer who designs expansion joints and specs material....do the above. or thiokol 2235.


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LSUengr
LSU Fan
Baton Rouge
Member since Sep 2005
1725 posts

re: Filling Joints in Concrete Drive
quote:

after cleaning out rotting expansion joints gaps to fill with cement.


As others have suggested, a self-leveling joint filler is the best option when removing and old expansion joint.


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Guzzlingil
LSU Fan
Baton Rouge
Member since Dec 2003
1696 posts

re: Filling Joints in Concrete Drive
What are their prices...?

I can get the BASF, SIKA, DOW or Tremco SL...

It might be cheaper if I can UPS them to you...


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HonoraryCoonass
LSU Fan
Member since Jan 2005
15169 posts

re: Filling Joints in Concrete Drive
quote:

after cleaning out rotting expansion joints


I’m not even sure pulling out the rotting wood is necessary. Just chisel/grind it out to 1/4” to 3/8” below the surface, and you wouldn’t need a backer rod…..the old wood becomes your “backer rod.”


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