Step 1 the first step is to the basement first.
Raising sagging roof.
If the line does not continually follow the bottom of the.
Check the ceiling for sagging by attaching a string on one end of the beam and run it along the bottom edge of the beam.
When the roof framing is assembled two ceiling rafters are often joined together to create a longer span.
Excess weight from snow and design flaws.
Depending on the degree of sagging your contractor might need to use jack posts to raise the roof before installing any reinforcement.