we’ve drywall in our kitchen that was painted with a lustrous semi-luster paint a good 8 yrs ago.

We’d like to mount 3″x6″ tumbled marble as a backsplash over the drywall.

It’s around 1/4″ thick as result probably little heavier than say, the small square pane tiles that arrived on a 12″x12″ netting. One man at the Home Depot stated we might just sand and scrape up the drywall and next apply the thinset and mount the marble. One More said we may want to utilize a cement backing.

We aren’t actually DIYers and would as result we don’t need to make extra work with the cement backing if it isn’t needed. That said, we don’t need the drywall to begin peeling and the marble tiles to begin falling away after a brief amount of time.

Please advise. Thank you!

Tumbled Marble Backsplash