Is this how Kerdi is supposed to look after water test
Davey76
| Posted in General Discussion on
My contractor installed Kerdi membrane system and we waited 48hrs to water test. We filled and waited 24hrs. Water level stayed right at the line. FYI he has used Kerdi before. We were both surprised and worried to see water moisture had wicked up above the corner band. See pic. Is this normal? Arrow points to water level that stayed solid for 24 hrs but it’s clear there is moisture above water level. Thanks for feedback.
Replies
It's probably ok and I know in Kerdi video they install the pan last but I think like a water drop and so I install the pan first then the corners and then finally the walls so even if a drop got through it would run into Kerdi material. Just MHO.
i dont use any membrane in showers I screw down a Hardi backer then tape all corners and paint and roll on 3 layers of Mapei liquid membrane once its dry i do the pre slope and put the liner about 10" up the walls and over the kerb finish the pan Mapei liquid membrane the whole shower and tile
If the Kerdi was installed correctly and the substrate is sound, the Kerdi should remain intact and waterproof after the water test. However, there may be some slight wrinkling or bubbling of the membrane, which is normal and should not affect the performance of the waterproofing. If you notice any significant damage or failure of the Kerdi during the water test, such as tearing, delamination, or water seeping through the substrate, then it may indicate an installation issue or substrate problem that needs to be addressed.
If the Kerdi was installed correctly and the substrate is sound, the Kerdi should remain intact and waterproof after the water test. However, there may be some slight wrinkling or bubbling of the membrane, which is normal and should not affect the performance of the waterproofing.
If you notice any significant damage or failure of the Kerdi during the water test, such as tearing, delamination, or water seeping through the substrate, then it may indicate an installation issue or substrate problem that needs to be addressed.