Clean the location where you’ll be installing the carpet remnant. Remove any debris from the area where it will cover to allow for proper adhesion of the glue. If old carpet glue is on the floor beneath, use sandpaper to smooth it down.
Cut the piece of carpet remnant to the size needed for your project with a carpet razor.
Apply some carpet adhesive onto the front of a trowel. Spread it onto the floor in the area where you’re installing the carpet remnant, creating an even layer.
Dust off the back of the carpet remnant, line it up with the adhesive on the floor and press it into place. Use a carpet roller to help flatten it if the carpet remnant is large. Allow an overnight drying time before walking on the carpet.