Space under boards

[FCHAdad]

First year backyard-rinker. Boards are up and waiting for cold to flood, but have been growing more and more concerned about the spaces under the boards where the lawn wasn't level, as much as 1.5" in places. When I flood the liner, are these spots vulnerable to "hernias", or will the spring clamps & liner be strong enough to hold it all up? If there's snow around when it comes time to flood, I might just backfill with snow to be safe, but not sure what to do without snow. Should I worry or just turn on the hose and go with it?

[legojerry]

You definitely need to do something about this, the liner can slip under the space and cause some serious havoc. I ended up using grass clippings that someone conveniently dumped by my tree. You could use soil too. Just my 2 cents.

[RobD]

I filled mine in with some dirt, I was afraid my liner would split.

[FCHAdad]

Okay. I have an extra yard of compost from the garden which should fit the bill - my lawn could use all the compost it can get! Thanks for the advice.