Hi there, There are many types of ledgerstone, and yes, slate can be tricky. This was an exterior ledgestone. For this particular product, the contractor followed very specific instructions from the manufacturer, especially in regard to the installation and the sealant used over the stone. I spoke to the contractor regarding this question and he said that if the slate starts to look dull, it is time to reseal it.

Hi S.Lo, so sorry you had such a difficult experience. Prior to the installation of this product however, we checked with the vendor and the manufacturer about the application. Although this was a exterior stone as well, we thought it prudent to verify if the product was appropriate for install in the shower. It was approved for the application with the caveat that the contractor must follow their installation instructions and use a specific enhancer and sealer. All the required procedures were followed. There are many different types of slate, it is unfortunate that your product in a "shower application" did not work. Maybe the vendor you worked with did not provide the proper guidance as to whether the product was appropriate for the application, or installation and sealant instructions were inadequate. I hope they provided assistance with the re-do.

Trish Herson Interiors what is the specific enhancer/ sealer to be used in shower?

Never use natural stone in the shower. Slate is ultra porous, despite any application or "professional" standard. I wasted $5,000. do not make the same mistake.