when you pour a concrete bench top onsite over existing cupboards do you suggest a "moisture barrier" (black plastic) be placed under the concrete to protect the cupboards
Yes, you will need to put down a moisture barrier to protect your cupboards. It is also recommended that you triple-check that the cupboards can't take the weight of the concrete - remember it will be slightly heavier when wet.
Also, apologies for the delay in this reply - we had a technical issue that was preventing replies from being sent out.
The BUILD team