I guess my view is not whether the Provia is worth $1000 more than the Millikin, but why you believe you have to spend $6000 to get this type of door. In my area I can guarantee that one can get a really fine door with sidelights for thousands less. How many bids have you gotten for the type of door you want? Is it some unusual size? Just as a point of reference, take a look at what fiberglass doors with sidelights are going for on eBay: Here is a link that might be useful: Fiberglass doors

I just bought my 2nd Reliabilt barn door. The first one was easy to install with quality installation materials. Well the 2nd one NOT SO MUCH. What a disappointment. The “plugs” for where there are no studs were horrible. They fell apart, I promise it was professionally installed. There was no board for bracket (it was there for the first door) it turns out it IS it is important. Between purchasing new “plugs” PLUS A BOARD (We chose oak for durability) it was an additional $50+. I am terribly disappointed. I feel you probably don’t really care, however, I am sharing my disappointment. I will not tell my friends to use your product. BTW, this might be the reason Lowe’s has not been selling them🤷‍♀️, just saying. Donna Hammond

Kompy, My experience was at Lowe's....Perhaps it is not the same everywhere. I just double checked my quotes just to make sure I was not mistaken. I had the exact same order priced out in 3 different door styles (all the KD did was change the door style in the computer). I did the Provence door/$169 per lin ft, Kensington/$181 per lin ft, and Carrington/$240 per lin ft. Here are some examples of the differences in price.... Crown molding with mounting strip: $486, $516, $504 Wood toe kick: $55, $59, $57 Refrigerator Wall Panel: $147, $156, $152 Wood skin for the back of peninsula: $239, $254, $248 Even the cushion close drawer glide system (which I think might now be standard?) had different prices: $$595, $686, $668 Oddly enough, the trim pieces for the most expensive door (Carrington) were cheaper than the second most expensive door (Kensington). So, that was when I decided to take a Tylenol and put away the spreadsheet. As you can see, they were not huge differences, but it still struck me as odd that things like toe kicks and skins would have different prices bc they are all made the same regardless of the door style. In the end, we purchased based on the door style we liked, which was a Home Depot exclusive, and we negotiated with them until we got to a price we thought was fair based on our comparable pricing of Kraftmaid and Merillat cabinets. Again, this was just my experience so I just put it out there for what it's worth.

I can’t answer your original question (sorry!), but I can clear up the other stuff. ;) My architect agrees. He says if u do put Kerdi over wall board there will be a lip and a problem for tile Since Kerdi Waterproofing Membrane, not Kerdi-Board, goes over the green board, there is no lip: “Waterproofing for tiled showers with a bathtub can be done in a couple of ways, both equally effective. KERDI-BOARD is ideal for use instead of gypsum or cement board in cases where the wall studs are accessible, while the KERDI waterproofing membrane is perfect for application over wall boards already in place.” Schluter®-KERDI-TUBKIT The Schluter®-KERDI-TUBKIT contains all the components necessary to create a fully waterproof and vapor tight bathtub surround assembly. Designed to create a fully waterproof and vapor-tight enclosure for tiled bathtub surrounds Contains waterproofing membrane, and waterproofing strip, pipe seal, mixing valve seal, and sealing and bonding compound