Hi.
I have an alfresco area under cover with a concrete slab, I'm looking to put stacking sliding doors in the opening measuring 4.3m x 2.1m.

The issue I have is there is a slope from one side to the other of around 40mm. So the door will sit higher on one side

The window places have suggested to build me a concrete hob for $1600 to sit the door on it, but that's outta my budget.

Is there any other cheaper options? Like using packers etc? How will these packers hold?

Thanks


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