square wall framing by checking the room dimension for bedroom, bathroom and toilet, measure according to site plan from all 4 corners and adjust internal framing to suit the dimension on plan. use the 345 method to measure by setting string line on the corner then adjust to fit until angle is right. Once dimension and corner are accurate at 4 corner of the room, then straighten the wall with a straight edge or string line and dodger block and fix bottom plate permanently with 2 nails between every stud.

 Bathrooms require to be square off most accurately due to fixing of shower box and bathtub later on, when squaring off corner of the walls use a 90 degree square and adjust walls to fit the metal square