These will grip the carpet backing and hold it in place.
Tack down carpet on stairs.
To achieve the right grip you need to.
If the carpet padding is tacked on simply pull it up and dispose.
Grab a sharp utility knife and a measuring tape and get to work.
Roll up the removed carpet fasten it with a piece of duct tape to keep it from unrolling and dispose of it in a contractor bag.
Working from top to bottom apply removable carpet glue with a glue gun and adhere the piece to the stair.
Use the knee kicker to pull the carpet tight as you place another row of staples in the corner between the riser and the tread.
Pull the carpet tight and run a row of staples along the top of the riser where it meets the tread of the stair.
Cut your tack strips into lengths which are 4 inches shorter than the width of your carpet runner allocate two strips for each step of your staircase.
Measure the width of the stair and length.