Press the kraft paper onto the floor's entire surface, allowing the edges to bend upward in the corners and along the edges of the walls.
Draw a line on the kraft paper, following the entire edge of the floor. By marking a line along the edge of the floor and along the the bottom edge of the wall, you will create a "stencil" that will help you shape the carpet.
Tear the kraft paper as necessary to fit around seat support beams.
Place the kraft paper onto your section of carpet.
Cut the carpet in the shape of the stencil using the carpenter's knife and the metal ruler for long, straight sections. Make sure to cut approximately 1/4 inch to 1/2 inch outside of the black marker line.
Cut slots in the carpet as indicated by the torn kraft paper to accommodate seat support columns.
Press the carpet into place.
Staple one edge of the carpet into place using the staple gun, making sure to position the staples approximately 8 to 10 inches apart.
Lay strips of carpet glue along the entire length of the carpet approximately 4 inches apart using the glue gun and carpet glue.
Press the carpet against the glue, pressing the entire surface against the floor.
Wipe the carpet with your hands to get rid of any air pockets or wrinkles.
Staple the carpet into place using the staple gun, making sure to allow any excess carpet to bend upward along the wall.
Cut the excess carpet using the carpenter's razor.
Staple the floor trim into place using the staple gun.