Therma-Tru Smooth-Star - Manual (Page 7)

6
Check rough opening as follows and correct if necessary:
• Sub-floor to be flat, level, and clean. Sill must be supported throughout
its entire length.
• All four corners to be square. Check with a framing square.
• Framing and walls to be plumb. Use a 6-foot level to check both sides
of opening.
• All wall surfaces to be straight and sides parallel.
• Opening to be correct size. Allow 3/8 on sides and 1/2 at head.
" "
Frame Installation
Wall
straight?
Wall
straight?
Check all four
corners with
square.
Check each
side both
ways.
Check floor
under sill.