Why isn't the stair-runner price just the step rate times the number of stairs?
The per-step rate is one part of a rough estimate. Below 14 straight steps, the project minimum may set the price. A 14- or 15-step straight staircase uses a package price. After 15, each additional straight step adds that option's per-step rate.
These hypothetical estimates assume straight steps only, ordinary removal is needed, no landings or curved steps, no extra travel, no heavy removal, and a project under 80 square yards. Essential includes carpet; service-only is a separate rate for the work.
At 10 steps, service-only is $390 because its minimum is higher than 10 × $35 ($350). Essential is $430 because 10 × $43 meets its $430 minimum. At 14 or 15 steps, service-only is $490 and Essential is $595. At 16 steps, one extra step brings them to $525 and $638.
The final quote follows an in-home measurement and review of the carpet and work you choose.
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What changes a stair-runner planning estimate?
If no removal is needed, a $60 credit applies once per project. For a separate hypothetical 14-step Essential project with no removal needed, the $595 package becomes $535. The other assumptions above still apply.
Each curved or pie-shaped step adds $50, and each landing adds $60. Confirmed extra travel and heavy or unusual removal can change the estimate. We measure turns and landings at home before confirming the runner plan and quote.
See how turns and landings affect the runner layout
What belongs under an installed stair runner?
Carpet cushion, when used under an installed runner, is chosen as part of the carpet and installation plan. A pad sold for a loose room rug has a different job; its advice alone cannot tell you what suits stairs. The choice depends on the exact carpet, the proposed cushion and fitting plan, and your staircase.
The Carpet and Rug Institute's 2019 residential installation standard discusses cushion selection under section 11.2 for stretch-in carpet and says to follow the carpet maker's guidance. Its stair section, section 15, also points to the maker's instructions. Those sections help you ask about your own carpet and stairs; they do not tell you which installation method this project will use or that every stair runner needs the same separate cushion.
Terminology: CRI 105 residential carpet installation standard (2019), sections 11.2 and 15.
What should you ask before accepting the stair-runner quote?
Ask which exact carpet and cushion or other fitting system is proposed, and whether cushion is included in the quote. If there is old carpet or cushion on the stairs, ask what the quoted work would do with it.
Ask which written instructions apply to that carpet and proposed system. The installer should check them against the actual stairs. If the instructions are missing or conflict, get guidance for the exact products before accepting the plan.
See how customer-supplied carpet is reviewedCompare carpet samples at home
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