Thanks guys! Densshield is mostly on. I work on wooden boats too. It's curious to me that no one mentions polysulfide calk or the 3M 5200 (one part polyurethane)in some of these threads. I plan on calking the bottom of the denshield (between denshild and mudbed) with 3M 5200 which is another under water calk for thru hull fittings. This is used on hull of the boats, and for all sorts of reasons. Sticks and stays. It's just not fast. Can come in some different colors. I do not like the performance of silicone calk in real wet envirements but maybe that was years ago. Has it changed?? I'll have about a 3/16 gap at the bottom of the denshield and between each sheet I calked with butly rubber and pushed it together. Now I will tape the seems per instruction...

I saw one of the examples Mr. Dunbar showed making a mud bed and he slatherd latacrete on the mudbed which made me think I have to. It looked like a similar set up as mine. Also in these threads, I saw a lot of references to waterproofing all of the fasteners. I really want to do this as right as I can. Perhaps should have gone with the cement board as kerdi isn't too available for me, joe amature, as far north as I am.

Thanks again, didn't expect an answer so quick!

JFK

Waterproofing the mortar bed is what you do with the Schluter system. Schluter of course prefers people use Kerdi with their drains, but many of us find the liquid membranes are much faster to install. I believe you have a clamping style drain, so the liner you put in should be the only water proofing in the pan.

Yes, all fasteners and other penetrations of the den's should be water proofed, at least to shower head height.

I used Dens Shield for several year before switching to Hydroban liquid water proofing. I believe it's a good product, just not available where I live.

Thanks! I love this stuff! Learning by leaps bounds and my mistakes. Almost ready for tile and then watch me slow down... Have a good week!
Jim

First of all it used to be that when using ditra, you could not use any modified thinset even when dealing with plywood, now of coarse this has been modified to, its okay to use modified thinset.I believe that you are okay to use modified thinset even though you are using kerdi, I recomend " laticrete 253", keep in your mind however that " by the book" kerdi can not be set over plywood, we do it, seems to be just fine. No guarentee.