Step 1: Snap a Chalk Line

Measure the width of the carpet tiles. Measure this distance out from the longest, straightest wall and snap a chalk line across the room at this point.

Tip: Walls aren't necessarily straight, especially in older homes. Snapping a straight line means the tiles will line up straight even if the wall doesn't; baseboard molding will cover gaps between tiles and the wall.

Step 2: Adhere Carpet Pieces

Use double-sided carpet tape to adhere tiles to the floor. If installing carpet tiles over hidden in-floor storage bins, don't tape down the tiles over the bins.

Trim as needed. Trim the carpet tiles as needed using a metal straight edge and a sharp utility knife.

Tip: To trim tiles neatly, flip the tile carpet-side down. Don't try to cut through the depth of the tile all at once. Instead, score the tile several times with a sharp utility blade — using a straight edge as a guide

Step 3: Replace Base Trim

Replace any baseboard molding or install new molding, as desired, to cover gaps between the carpet tiles and the wall.