STEP 11. After the first section of a floor is installed, check to see that all the grid lines are straight. If the grid is not square, you can make them square by bumping the rows of installed panel with your foot. If this fails, take up every third or fourth row of panels and tap the bases in the direction of the panels that have to be moved. All grid lines should be straight before cutting in the perimeter panels.

Caution: Be sure not to create a tightness problem that will result in difficult removal and reinstallation of panels.

Step 12. Proceed with next row