[gowings]

Do you guys wait 24 hours before tiling after applying waterproofing. I use Aqua defense on walls etc. Alot of times I use it over reg. drywall in areas that are not boarded with waterproof board. Lets say above the shower head height to the ceiling. That 2 1/2 ft area to the ceiling. Where it was painted before and now the homeowners wants tile to the ceiling as more of an aesthetics look not for water defense. I put 2 coats on, waiting for it to dry between coats usually a couple of hours. I just wonder If I have to wait 24 hours before slapping the thinset on. Yet after 2 or 3 hours its changed color to the dry indication.

 

[MarkJames]

Do you guys wait 24 hours before tiling after applying waterproofing. I use Aqua defense on walls etc. Alot of times I use it over reg. drywall in areas that are not boarded with waterproof board. Lets say above the shower head height to the ceiling. That 2 1/2 ft area to the ceiling. Where it was painted before and now the homeowners wants tile to the ceiling as more of an aesthetics look not for water defense. I put 2 coats on, waiting for it to dry between coats usually a couple of hours. I just wonder If I have to wait 24 hours before slapping the thinset on. Yet after 2 or 3 hours its changed color to the dry indication.

I always do two coats for full coverage, then tile next day, but sometimes it seems to dry pretty quick.

 

[gowings]

Had a patch job to do. So I repaired and waterproofed an area 2x8. Just 12 tiles to finish off the job and grout.Just hate to wait another 24 hrs. Since I'm idle till next day afternoon.

 

[GO Remodeling]

The first coat seems to dry within an hour with liquids. The next coat can take 2-4 depending on humidity. A slow fan can help as it doesn't dry the top and not the bottom.

How about a sheet membrane instead? Or Denshield?

 

[gowings]

The better of me decided to put a fan on it and I'll do it in the am. Though I did precut half the tiles. So i could lay around in the sun in the pm:thumbup:

 

[Tile-guy]

Aqua defends actually dries very quick. But I always do a vertical and horizontal coat. Could be done in one day.

 

[TNTRenovate]

First, number of coats don't matter. You need to build to proper mil.

Second, dry and cured are not the same thing. You should wait until it's cured to install tile. The instructions are pretty clear on recoat times as well as tile installation times. Follow the manufacturers directions.

For me, I never installed tile the same day. I used FibaFuse on the seams and corners. It would take longer than the instructions to dry and cure in those areas. I also always have a lot of other things to do while I am waiting, so I just waited until at least the next day to start tiling.

 

[gowings]

I too use fibabuse and use aqua defense as my waterproofing product. They kept telling me at the dealers. After 4 hours of letting the waterproofing dry, start tiling. But that's way to quick. I'd rather lean on other installers like you for information on real time on the job experience than some guys behind a desk.
Thanks for the info.

 

[philcav7]

I too use fibabuse and use aqua defense as my waterproofing product. They kept telling me at the dealers. After 4 hours of letting the waterproofing dry, start tiling. But that's way to quick. I'd rather lean on other installers like you for information on real time on the job experience than some guys behind a desk.
Thanks for the info.

I've found the manufacturer specs to be the most reliable info. They are the ones that design and test the products. Often a cushion is built into their recommendations. There testing may have repeatedly shown adequate curing in only 16 hours, but print 24 hours just to be safe since field conditions vary.

Experience may also show an installer 16 hours is adequate, but is possibly taking a risk by not waiting 24. When it comes to most things, especially tile, I am very by the book....except tomorrow as I will be using modified mortar on kerdiboard 😁

 

[Jimbo28]

Actually, the manufacturer's instructions say it's okay after 30 to 50 "minutes" to apply thin-set for tile or stone: "Mapelastic AquaDefense is ready to receive thin-set mortars for tile or stone when dry to touch (about 30 to 50 minutes after applying second coat)." Personally, I think this is way to quick to apply any tile after letting this stuff dry, but they claim it's ok so I guess you can do it after an hour. To be safe, I would wait until the next day before tiling. Even though they say it's fine, I just don't see how it can be cured (or even completely dry in some cases) that quickly.

 

[jefferson17]

Personally, we would never waterproof and tile in the same day. In this particular case, the shower is already waterproof. You are merely adding tile above the showerhead.

Regardless, it is good practice to waterproof the new area. 2 Coats, applied with 3/8" roller. We always add extra cure time, especially between last coat and applying tile.

Here is an excerpt from the Mapei AquaDefense Install Guide
1 Apply 1st coat of Mapelastic AquaDefense (including previously coated areas) using a 3/8" (10 mm) nap roller. Let dry to a dark green color.
2. Apply 2nd coat and let dry.
3. Final dry thickness of first and second coats should be 20 to 30 mils (about the thickness of a credit card).
4. Inspect and, as needed, recoat pinholes or areas not completely covered. Let dry

Installing Tile or Stone
• Mapelastic AquaDefense is ready to receive thin-set tile or stone when dry to touch (after about 30 to 50 minutes).
When installing mediumbed mortars (for large tile or stone), screeds (for leveling floors), or epoxy adhesives, let Mapelastic AquaDefense cure for at least 8 hours.
• For tile and stone installations, use MAPEI polymer-modified or epoxy mortars.