Expansion joint question

[Gary Swart]

I have a concrete driveway which was poured about 20 years ago using 2x4 divider/expansion joints. They are now due for replacement. I am considering so-called "outdoor wood" and Redwood, but I am totally open for suggestions.

[glenn bradley]

You may want to look at some of the sythetic wood product used for decking. The borgs carry them. No swelling, no rot, etc.

[Ben Grunow]

In your driveway where cars could be turning their tires on the wood I would not use redwood-too soft and way too expensive. PT would be my first choice unless you could find an engineered product in the right thickness.