Get the risers in before the carpet goes down. That is the short answer, and it is the thing most people ask about second instead of first.
We hear this exact situation constantly, usually in late summer. Someone finished their basement over the winter, the steps down are bare construction lumber, and now they want them carpeted. A customer wrote to us this July with almost that sentence: just redid the basement, wooden steps, adding risers, wondering about carpeting just the steps and whether there was a minimum.
Good instincts. Here is the full picture.
Why risers come first
A riser is the vertical face between two treads. On a finished staircase it is a closed board. On a lot of basement stairs it is open, because the builder only needed the stringers and the treads to get you downstairs.
Carpet on a wrapped stair goes over the tread, around the nosing, and down the face of the riser, where it gets pulled tight and fastened. Without a riser there is nothing to pull against. The carpet either sags into the gap or has to be finished at the tread edge, which is a different look entirely.
So if you want the staircase to look like the ones upstairs, install risers first. Half inch or three quarter inch plywood or MDF cut to fit is fine. It does not need to be finish grade, because you are covering it.
If you would rather leave the stairs open, that is a legitimate choice too. Treads can be capped individually and it reads as more of a modern, industrial look. Just decide before anyone measures, because it changes the material and the labor.
The order of operations
- Frame and finish the basement walls and ceiling
- Install risers on the stairs
- Prime or paint the stringers and any exposed sides, because you cannot reach them once carpet is down
- Install the basement floor covering
- Carpet the stairs last
Painting the stringers is the step people skip and then regret. The outside edge of a staircase is visible from the room, and getting a brush in there next to finished carpet is miserable.
Does the tread need work too?
Check for movement. Stand on each step and shift your weight. A step that flexes or creaks will still flex and creak under carpet, and now you cannot get to it.
Screw loose treads down into the stringers before you carpet. Construction adhesive plus screws stops almost all stair squeaks. It takes an hour and it is the difference between a staircase that is quiet for twenty years and one that announces every trip to the laundry.
Also run a straightedge across a couple of treads. Basement stairs are often site-built and not perfectly consistent. Carpet hides small variation fine, but a tread that is badly out of level should be shimmed.
How much carpet a flight actually uses
Less than people expect.
A wrapped box stair uses roughly the tread depth plus the riser height plus about three inches for the nosing. In practice that is 18 to 20 inches of carpet length per step, cut at the stair width.
A 13 step flight at 19 inches is about 247 inches, so a little over 20 feet of length. Carpet comes twelve feet wide, and a typical basement stair is 36 inches, so you can get three stair widths out of a twelve foot roll width.
That means a flight of basement stairs very often fits on a single remnant. It is one of the best uses for one. Have a look at what is on the wall and bring your step count.
Landings and winders change the math. A landing is measured as its own small floor area, and pie-shaped winder steps use noticeably more material than straight ones because of the wedge shape. Count them separately when you call.
What fiber holds up on basement stairs
Stairs are the hardest working surface in a house, and basement stairs get the added complication of moisture.
Nylon is the workhorse. It has the best crush resistance, which is what you want on a tread edge that takes every footfall in the same spot.
Olefin (polypropylene) resists moisture and does not fade, which suits a basement. It is less resilient than nylon underfoot, but on stairs the padding does a lot of that work.
Polyester is soft and less expensive and is fine for a lightly used basement, though it will show wear at the nosing sooner.
Skip anything with a long loose loop. A pet claw or a suitcase corner will pull a loop, and a run in a loop carpet on a staircase is not subtle. A low, dense cut pile or a tight level loop is the safer choice.
Our guide to carpet fiber goes deeper on this.
What a stairs-only job looks like
Stairs are priced per step rather than by the square yard, because they are hand work. Straight steps, landings, and winders all price differently.
Most flooring stores have a job minimum, and it is a fair question to ask before anyone drives out. We would rather tell you the number on the phone.
You also want to know who is doing the work. On a staircase this matters more than on a flat floor. A tread wrapped by someone who does it every week looks tight and even at every nosing. One wrapped by someone learning does not, and it is visible from the bottom of the stairs forever.
At Remnant City the person who measures your stairs is the person who installs them. We have been doing it on Route 51 since 1970, and the same installer comes back if anything ever needs attention.
Ready to get numbers
Count your steps, measure one tread and one riser, note whether there is a landing, and call (412) 885-1444. Or send it through the site and we will come back to you.
If you want to see finished work first, our project gallery has a stack of real stair jobs, photographed in real houses.
