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How long to waterproof typical shower with kerdi.

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#42 ·
when I use liquids, I thinset the corners, seams and nailheads. I know some of you use the fibermesh for corners and seams but I trust thinset more. Then I spot liquid the seams and nail heads. Then the whole board gets coated.

First coat dries within an hour usually. Second coat can take 2-3 hours depending on temp/humidity. I don't use a fan directly on the walls as I think it only dries the liquids surface and leaves just below uncured. Getting on the wall too soon re-wets an uncured membrane,imo. By the time I cbd the wall, and get to the second coat that's the day. There is no "we."
 
#43 ·
ohiohomedoctor said:
I went full circle with showers when I gave a ****. Ended with dry pre slope drypack full liquid.

The kerdi board isnt strong enough between 16oc imo. I started run 1/2 ply first and full gluing before I woke up and said f that...

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Wedi is cement coated on both sides which gives it rigidity. The USG product I mentioned seems to have a denser foam and sturdy plastic-like skin.

A first layer of plywood? I understand why you switched.
 
#45 ·
TNTSERVICES said:
I do a kerdi pan.
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gbruzze1 said:
You red guarded the shower pan instead of doing a traditional pan liner? Red guard over the pitched mud floor?


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Kerdi pan, still has to wait for the seams/joints to fully cure. Flood test is at minimum overnight.

I used the mesh RG at the joints.

Tom
 
#53 ·
olzo55 said:
when I use liquids, I thinset the corners, seams and nailheads. I know some of you use the fibermesh for corners and seams but I trust thinset more. Then I spot liquid the seams and nail heads. Then the whole board gets coated.

First coat dries within an hour usually. Second coat can take 2-3 hours depending on temp/humidity. I don't use a fan directly on the walls as I think it only dries the liquids surface and leaves just below uncured. Getting on the wall too soon re-wets an uncured membrane,imo. By the time I cbd the wall, and get to the second coat that's the day. There is no "we."
Click to expand...
You should try the we, makes the job so much faster and easier.
 
#54 ·
Tile is my main thing. I do anywhere from 2-4 showers a month so I may be a bit faster. I use Schluter exclusively. Foam pan, Kerdi over drywall. If the seats aren't already framed in I use Kerdi board for the seats. By myself I can waterproof a shower start to finish in 3-4 hrs. If I have to pack a partial pan for larger showers I have to come back and install the band and Kerdi on the base. If I have a helper I usually figure a half day to install base, drain, Kerdi on walls and pack pan and set curb on a 6x8 shower.

I haven't used wedi so I don't have anything to compare to.
 
#55 ·
tjbnwi said:
An 8-9 hour day for a 3x4 shower with Kerdi, 4-5 hours with Kerdi board.

I do not find Wedi any faster, you have to rabbet joints and seal all the corners, seams and penetrations.

Tom
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I have only had to rabbet the shower tray a couple times where opening was already there. When I do the framing I don't need to cut the pan at all.

I can do the Wedi kit way faster than the Kerdi on drywall/CBU but not used Kerdi board as its too much money compared to Wedi here. All special order where as I can walk in a buy Wedi of the shelf.

But either way I just schedule a day in the estimate no matter if it takes 4hrs or 8hrs
 
#57 ·
AGullion said:
Be soooo careful with wedi pans. Any caulk joint below the tile floor is really scary


Kerdi board flexes a lot ....anyone else notice that?
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I assume it stiffens up when tiled similar to the plastic niche pans that are has hard as a rock when tiled.

I am seriously considering Kerdi Board after getting some pricing from a supplier. I am also thinking about going Ditra as well.
 
#58 ·
The flex when setting messes with my flatness.

We have a board here called prova ...it is great ...similar to wedi , very stiff. Duroc is introducing one also.

Ditra is a really nice product . As far as crack prevention , nothing comes close .
The only concern I have is the new, impregnated moisture resistant subfloors aren't really great to bond it to, they are somewhat waxy.
 
#59 ·
TNTSERVICES said:
I assume it stiffens up when tiled similar to the plastic niche pans that are has hard as a rock when tiled.

I am seriously considering Kerdi Board after getting some pricing from a supplier. I am also thinking about going Ditra as well.
Click to expand...
It seems plenty stiff once tiled. It really is nice to work with.

I love Ditra. Can't stand to use CBU. Using the right trowel size to see the Ditra is very important or you won't have good success with the install.
Also much looser thinset. Should be able to pour out of the bucket.
 
#60 ·
Xtrememtnbiker said:
It seems plenty stiff once tiled. It really is nice to work with.

I love Ditra. Can't stand to use CBU. Using the right trowel size to see the Ditra is very important or you won't have good success with the install.
Also much looser thinset. Should be able to pour out of the bucket.
Click to expand...
I took a Schluter class so I have ask the trowels.
 
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