Draw Straight Line On The Floor
If the bubble goes to the center of the level between the 2 black lines your line is straight.
Draw straight line on the floor. Pull the line very taut and the hold the line down on the mark with one hand. Reach out with your other hand and lift up the chalk line about 10 to 12 inches from the floor pulling straight up then release the line so it snaps down onto the floor creating a crisp straight line. Use a bubble level as you go to make sure the lines you re drawing are perfectly straight. Hardwood floor in.
This video is about how to make a first straight lane during hardwood floor installation on concrete. Hi all i have to draw a straight line on a floor before i put tiles. Place the level along the line. If you re trying to paint along the line where your walls and ceiling meet you can skip this step.
The problem is that the width at one end of the room is 290 cm while at the other end of the room is 295 cm so i assume that the walls are not straight. A chalk line can be as long as needed being.