Here's what we're doing to all of these in Texas:
1. pry, dig, gouge, curse out the old boards. Use a narrow pry bar in the
joint and another rod/stick/board on the ground perpendicular to the joint
to push against.
2. If the joint if over 1" deep, I used sand to fill it in to about 1" from
3. Use "backer rod" - foam rods that I got at Home Depot. I got 1" diameter
rods (they come in other diameters) to push down into the joint. It should
compress nicely into the joint and leave about 1/4" to the top.
4. Use the quart size urethane polymer fill (I used Sikaflex brand) in a
caulk gun to fill. This is the self-leveling stuff, makes a very nice joint
and dries very smooth. Available in colors, I used gray. I think $10 per
tube, took me 10 or 12 tubes to do the huge expanse of driveway and patio
that I have.
Here's a pretty good description:
"Do not ask what the world needs. Ask what makes you
come alive and go do that. Because what the world
needs is people who have come alive." --Gil Bailie
----- Original Message -----
From: "Darrell Walker" <firstname.lastname@example.org>
Sent: Sunday, July 18, 2004 9:01 PM
Subject: Concrete driveway expansion joint repair/replacement
> The expansion joints in my concrete driveway (about 15 years old) are
> rotting away (they are cedar boards, and I'm in the Pacific NW). Any
> ideas on how to repair/replace these? I could get the rotten wood and
> accumulated dirt out, but I'm not sure if I could drive another board
> in place.