Every roof is designed to support a specific maximum weight and anything above this especially for long periods can cause the roof to sag.
Raising sagging roof.
Step 1 the first step is to the basement first.
Excess weight from snow and design flaws.
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.
If the line does not continually follow the bottom of the.
When the roof framing is assembled two ceiling rafters are often joined together to create a longer span.