Every carpet install comes down to getting the carpet tight on the tack strip. If it is loose, it will wrinkle and ripple later. Two tools do that job: the knee kicker and the power stretcher. Most installers own both, because each one fits a different situation.
What a knee kicker does
A knee kicker has a toothed head that grips the carpet and a padded end you hit with your knee. Each hit pushes the carpet forward and onto the tack strip. It is the tool for tight spots like closets, hallways, stairs and small rooms where there is no space for a bigger tool. It is also what you use to finish the last foot or so along a wall once the big stretch is done.
Look for an adjustable head so you can set the teeth depth for the pile height of the carpet. Too deep and the teeth snag the backing, too shallow and the carpet slips. Replacement bumper pads and gripper inserts wear out over time, and they are cheap to swap. Shop knee kickers from Crain, Roberts and Taylor.
What a power stretcher does
A power stretcher is a long tool with a head on one end and a tail block that braces against the opposite wall. You set it, push down on the lever, and it pulls the carpet across the whole room in one stretch. This is the tool for living rooms, bedrooms and any room where a knee kicker alone would take forever and would not stretch evenly.
Extension tubes let one stretcher reach rooms of different sizes, and heads come in different styles for different carpet types. The Crain 500 and 520 Swivel-Lock stretchers are common choices, and the 515 Mini-Stretcher fits in between for medium rooms. Shop power stretchers and parts.
How installers use them together
- Hook the carpet on the tack strip along one wall using a knee kicker.
- Use the power stretcher to pull the carpet across the room toward the opposite wall.
- Trim the carpet at the walls and tuck the edge behind the tack strip.
- Use the knee kicker to tighten up any corners or edges the stretcher could not reach.
Which one should you buy first?
If you only do the occasional closet or stair job, a knee kicker is enough. If you install whole rooms, you will want a power stretcher too, since stretching with a kicker alone is slow and gives an uneven result. A full kit of both pays for itself the first time you stretch a large room tight.
While you are at it, a good carpet knife, a tack strip cutter and a pair of knee pads make the job easier. You can find all of them in our carpet installation tools section. Questions about which tool fits your job? Contact us and we will help you pick.