you bet you can tile it. I worked at a high end entry door company for years here in austin, we did the doors on lance armstrong's house, I was a designer but I got to go to the site while it was under construction, the home has a half million dollar pool spa combo and the entire interior surface is tiled in onyx (a hard type of travertine), I'm guessing $40-$50k worth of tile. lots of folks building these tuscan mansions out here in the southwest, texas, scottsdale, vegas, etc., are building pools that are tiled all the way with natural stone. natural stone is a good choice because it's spent the last 10 million years under water anyway:-) glass tile would be the most awesome and actually very appropriate for a pool, but you might get priced out in a hurry as most are $10/ft and UP. when installing the tile, make sure you clean the surface with solvent, make sure it is bone dry and it's above 60 degrees with no chance of rain. use white poly modified thinset mortar and latex the crap out of it. use a 1/4" V notch trowel, use a 1/8" V notch if you use glass tile. you shouldn't have any problems with it. as far as tile size goes, it depends on your pool, but for good adhesion you want 100% contact, so if your pool has big sloping sides, make sure the entire tile is making contact. use sanded grout and solvent seal the crap out of it, 10 coats if you can afford it. you may even want to consider putting down an epoxy sealer. post pics when you're done, these always come out great.

No it will not dekeoboe. We were building our cat's room in the garage and I wanted to be able to clean in from the garage with a window or large dog door and it wouldn't pass code. So if you do have one installed you need to know it might have to be removed upon sale of your house (ie door replaced with fire rated door). I used to crawl through the dog door in a rental we had whenever we lost the keys. It was a medium size and I was limber and skinny :) It did teach me about the issues of having a door anyone can skinny through easily. We were never robbed, but I'd not put one on my home now knowing how easy they are to get in. I do like the idea of the electronic one though...much safer. I've installed a gazillion cat doors myself OP. You need a kit (hd has them) a drill and a jig saw. It comes with a pattern and you drill in the corners then just cut the holes in a solid wood door. Easy stuff really. The kit hides your jiggly jig saw cuts if that's an issue. If you can't do that you can easily hire a handy man or woman to do it I would think...It's really not rocket science. I only suggest this because it sounds like you're not finding what you want and it's a pretty easy solution. Ours are always then painted to match the door so they blend in better. I'm going to add one to our hall to laundry in the next few weeks so I can keep the litter box out there (it's in our closet room now...I prefer it not be LOL). I miss our kitty room!

I have used their garage doors with success but I don't have any experience with their entry doors. They produce a solid garage door so that would lead me to believe that they can make a solid entry door but I would not base a decision on that empirical data on their garage doors.

We have iron double doors and they ARE heavy. They are very well balanced though and open and close like "butterrrr". My toddler grandchildren have no problem moving them once they are open. Price these doors before you fall in love with either idea. Our door was reasonable (4K +) but they can run much higher. Your hardware for these doors is not inexpensive either, and if you have the requirements that Renovator spoke of for your area of not being able to leave one side latched- a double may not be worth the security hassles. Our double door is inside a security gated courtyard so we often leave it open in nice weather when kiddos are not around.