Roof sagging is often due to an overloaded roof structure. If left unaddressed, it could further deform the middle of the roof and sag. The sheathing and rafters could bend because they can’t handle the weight of the shingles.
Continue reading to learn more about the causes of roof sagging and ways to fix it.
Causes of Roof Sagging
Roof sagging is often due to any of these three factors:
- Sheathing Issues
Most oriented strand board (OSB) sheathing can handle the weight of regular and architectural asphalt shingles. But if the sheathing suffers from water damage, it will bloat and weaken. Moisture can also lead to wood rot, which could spread to other parts of your roof and ultimately cause sagging.
- Wind Damage
Roofs can suffer from sagging due to high winds. Wind often pushes upward against the roof edges or downward against the middle and edges of your roof. The wind can also add pressure to the roof’s weight, causing the roof to deform and sag.
- Structural Problems
Misaligned rafters due to poor construction or installation will cause roofs to sag. Improperly constructed rafters can’t fully support the sheathing over them, and the latter won’t have enough strength to prop up the roof material properly.
You can prevent roof sagging through the following:
- Regular Roof Maintenance
Regular roof inspections allow roofers to determine your roof’s condition, conduct repairs and warn you about potential issues. Roofers also check your roof’s structural integrity and identify sagging areas.
- Rafter Reinforcement
Sagging often occurs when the roof material is too heavy for the frame and sheathing. Reinforcing the rafters with stronger lumber is one of the best ways to remedy this.
- Roof Replacement
Roofers might recommend replacing the entire frame, sheathing and roof material if the materials are nearing the end of their lifespan.
Get the best roofing specialists for your project. Christian Brothers Roofing can guarantee the proper installation of roofing systems, giving you peace of mind that your roof will last for several years. To schedule a consultation, call us at (270) 715-1999, or fill out this contact form.