Rising concrete curbs around flower beds
 

The concrete curbs around my flower beds have sunk. What is the best way to rise them and what is best to put under them after I get them risied? Thanks for any help, Debbie

Not 100% sure, but what if you added some gravel under them?

Might bring them back up and possibly reduce sinkage. Thats what we used for our patio stones and that seems to keep them from dropping. They still drop a little bit in the winter but usually come right back up after a spring thaw.

Hope that helps.

Leenders