Hardwood floor in.
Draw straight line on the floor.
Pull the line very taut and the hold the line down on the mark with one hand.
Use a bubble level as you go to make sure the lines you re drawing are perfectly straight.
If the bubble goes to the center of the level between the 2 black lines your line is straight.
Hi all i have to draw a straight line on a floor before i put tiles.
Snap the chalk line leaving a straight chalk mark on the subfloor.
Place the level along the line.
A chalk line can be as long as needed being.
This video is about how to make a first straight lane during hardwood floor installation on concrete.
When any project calls for drawing a long straight line on a floor wall or similar flat surface a professional mechanic will use a chalk line.
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.