It depends on the type of stone veneer you are installing. If you are using a natural stone such as limestone, marble, or sandstone, then you will need to use a mortar bed and cement board under the stone veneer. However, if you are using a manufactured stone veneer such as brick, slate, or HardiePlank®, then you do not need to use a mortar bed or cement board.
No, you do not need to use cement board when installing a stone veneer. However, using cement board as a substrate will provide a more even surface for the veneer to adhere to and will help to prevent moisture damage.
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