The place I'm installing this is 54'x26'. It has 8 doorways that are 3' or under. Do I need to install T moldings anywhere? In doorways to separate rooms? Or can I run it the full length and width of the space?

Hello Adam - No, you do not need to use T-moldings in any area of this layout unless you choose to do so. You can install our product up to 85' in either direction before you need a transitional break. The only exception would be if you're installing into a 3-seasons room. Then one would be needed leading into that room. Hope this helps answer your questions. Thank You!