I have bought books and read all over the internet but still have questions about building a room. When we are framing the wall we know we have to rent the gun that puts the nails into the concrete floor so I thought maybe would want to rent a nail gun at the same time but no where do I see anyone recommending nail guns to build the frame. Can you even use a nail gun to toenail in nails. Also I wanted to put insulation up in the ceiling joists but it is the "silent" floor joists and the inside of the lip is 19 in wide and the lips are 17 in wide. I thought if I could find 19" batting the lips on either side would keep it up there but I only see 15" or 23" at the home improvement stores. If there isn't 19 in then what do you use to keep it up. I looked at our county building code web site and they give some of the minimum code requirements which is 7 ft ceiling height. I don't have this all over the room and I saw in one book that to meet code half of the ceiling has to be the minimum height. Is that true? One more, are the Saniplus (upward flush) toliets expensive and do they work alright. Thank you so much for any help.