Corian tub/shower surround installed over Redgard

[Bluebinky]

The wife comes home just after I finish waterproofing the Hardieboard tub surround and decides that a solid surface surround is the way to go after all. It doesn't seem that silicone will adhere properly to the Redgard.

Should I go over the Redgard with skim coat of (modified) thinset, or any other ideas?

Thanks in advance.

 

[CountryBumkin]

I don't know the answer - but the guys at this forum are experts in this area http://www.johnbridge.com/vbulletin/forumdisplay.php?f=1

 

[Sponsor]

 

[MKS]

Would covering the redgard with 1/4 inch backer board be a deal breaker?

 

[Dj2]

You can you use modified thin set (powder type, not the premixed) over redgard.

 

[Bluebinky]

You can you use modified thin set (powder type, not the premixed) over redgard.

Thanks. That is what I was originally planning to do for putting up tile.

Any idea how well dabs of silicone will adhere to a skim coat of thin set? Which would stick better overall, modified or unmodified?

As for putting up more backerboard, it would seem much better to not penetrate the water barrier. It would still probably be better than using greenboard, as the manufacturer suggests.

I'll search on the johnbridge forum.