I'm in market for a 32" x 18" horizontal slide window for shower room. What is the reason for having double slider instead of just a simple single slider? I see no increase in opening for air or anything, except having the extra choice of left or right opening. Any idea? Thanks, Brian

Hello. I had a old exterior back door that was wood. I removed it today and purchased a prehung exterior door. Removed old framing. Dry fit the prehung door and it went in great but on the outside there is about a two inch gap past the brick molding. I can literally see behind the brick wall. The threshold is the old wooden 2x8 but cut with a slant will probably have to rip this out but there is also a large gap under the threshold. Possibly need to stack 2 2x8 to build it up? Any remedies. from the dry wall to the brick is 7 inches... There is about a 2 inch gap between the actual door frame and brick. Looks like we will be sleeping with no door on the back of the house tonight. If I build it out it will be past the metal plate on the threshold. Any ideas or advice someone can share? I put the front door in and had no issue like this.