Inspect the Interior:
Start by examining the attic or ceiling for visible dips, bowing, or warping in the roofline. Look for cracked drywall, bowed rafters, or separation between ceiling and walls.

Check for Moisture Damage:
Water stains, mold, or rot on beams and insulation may point to leaks that have weakened the roof’s structural integrity over time.

Examine the Roofline:
From the outside, observe the shape of your roof. Any visible dips or curves in the ridge line, eaves, or slopes may indicate a sagging problem.

Evaluate the Structure:
Inspect the rafters, joists, and trusses for cracks, breaks, or deflection. Ensure no framing components are undersized or inadequately spaced.

Avoid Adding Load:
Do not climb or place heavy loads on a visibly sagging roof. It may be structurally compromised.

Secure the Area:
If sagging is severe, restrict access to the attic or surrounding area until repairs can be safely made.

Professional Evaluation:
For significant structural concerns, always contact a qualified roofing or structural specialist to assess and confirm the safest repair method.

A. Structural Reinforcement:
Reinforce Rafters or Trusses:
Install sister rafters—new beams attached alongside existing ones—to strengthen weakened areas. This is often the most effective solution for sagging caused by deflection or aging wood.
Add Support Bracing:
Introduce collar ties or struts between rafters to improve load distribution and roof stability.
Replace Damaged Components:
In cases of severe rot or breakage, remove and replace the compromised trusses, joists, or rafters with structurally rated lumber.

B. Decking and Surface Repairs:
Re-secure the Decking:
If the roof deck has pulled away or weakened due to movement, use fasteners to tighten it back to the framing.
Replace Rotted Decking:
Cut out and replace any sections of roof decking that show signs of rot or water damage before reapplying underlayment and roofing material.

C. Addressing Moisture Issues:
Seal Leaks:
Identify and seal any roof leaks that may have led to moisture infiltration. Replace damaged flashing or seal joints with roofing-grade materials.
Improve Ventilation:
Ensure proper attic ventilation to reduce moisture buildup and temperature-related structural stress.
Waterproof Vulnerable Areas:
Install or upgrade vapor barriers to prevent future water intrusion and related damage.

Regular Roof Inspections:
Inspect your roof at least twice a year or after major storms. Catching small problems early can prevent costly sagging repairs.

Clean Roof and Gutters:
Remove debris that may trap moisture or add weight to the roof system.

Watch for Warning Signs:
Keep an eye out for new cracks in ceilings or doors that stick, which may signal shifting or roof sag.

Hire a Roofing Expert:
Sagging roof repairs often involve structural considerations and safety risks. A professional roofer or structural contractor will have the tools and expertise to safely restore the roof’s integrity, ensuring lasting results and peace of mind.