Its not that easy a repair to do from the looks of it. The one to tile is a vinyl insert metal and the carpet needs to be stretched up and the new insert put in. On the lino areas, it might need to have a new piece seamed on and re-stretched into the metal. Thus, do you have a piece left there to repair with? If not, sometimes we get a piece out of a closet to fix the visible areas. Chances are, that carpet is probably worn out to the point of no return. Meaning the backing is falling off and it will continue to fail and look bad. Might be a good time for new carpet.

I see areas where the metal has to be replaced. It looks like the locking lip is broken and split. I doubt if a dyi'er could handle this. I doubt if a pro could and if he did it would only be temporarly. I agree with KW. Also looks like the guy used up whatever metal he had on the bus, some being the wrong style. Nice pictures, they sure help. Daris

In some cases residential carpet that was originally laid fairly slack can be stretched quite a bit avoiding the need for a patch. Can we see a photo down the hallway or room(s) away from the metals? I agree it's likely in tattered condition right there in the door from so much wear. Only peeling it back will really tell if it's gone or worth salvaging. Assuming you're not replacing the whole carpet you need a real installer to fix this. Neither the stretch nor the patch are easy money for an amateur. You wouldn't know how to operate the right tools even if you could find/rent them. Stretching the carpet towards those doors creates some issues if there's other doors down the hall. Sometimes you'd have to splice and re-seam those doorways. That's not easy money where there's been heavy traffic. Nailing tackless strip and transitions into concrete can be near impossible even for someone with a lifetime of experience beating their head against the.........I mean pounding nails in concrete. Many installers hammer drill into the concrete or use high end epoxy adhesives to adhere tack strip or metal to the slab. This seems to be a regional preference based on the installer's skill level, preference and then characteristics of the local concrete materials and workmanship. I know I've come across a slab or two that I couldn't get nails to grab for the life of me. That's all I need is to be hammering a metal down right up next to ceramic tile------No thanks! good luck