Bullnose carpet stair treads is the way to go, but is it possible to replace the carpet on the stairs with wood, without destroying the house, live cluttered at construction sites for months or sell your only child to the bank? Of course, as long as you can answer yes to two questions, ripping apart a separate house to repeat a rung just does not make sense. In addition to building a standard set of wooden stairs it may cost four times more than the existing stairs and carpet stairs that turn into wooden stairs, in wood species to complement the balance of your home decor. It’s not unusual to save thousands of dollars. So what do you need to answer first?
Question number one: Are bullnose carpet stair treads you structured structurally? In other words if I had to remove the carpet and add some (or many) screws to the existing structure, would they meet the existing building codes and NOT squeak in daily use. If this does not happen then give up and start from the beginning before you waste more money. Question number two: Are you happy with the overall layout of your step? Are they the appropriate size, up enough on every step to be safe and offer enough depth for you to comfortably plant your feet? Many who do-it-yourselfer and even people in the trade have problems with the math used in build the steps.
They often think that when you get to the point of wanting to replace bullnose carpet stair treads this with wood. You can also play with the overall layout by adding width to the existing set of footprints. They think that if they build the front of the ladder under nosing it will give them long term. They forget that if you do this at every step, it’s canceling each other, so your layout should be acceptable as is.