Sagging Roof: What Can You Do About It?

• Nathan Brown
• 2 years ago
• Categories: Roofing
• Tags: roof maintenance, roof repair, roof replacement

The ideal roof should be strong enough to withstand extreme weather conditions and protect the home’s occupants from the elements. However, if you notice a sagging area on your roof, it’s best to call a professional roofing company right away. While a little sagging may not immediately mean your roof is going to collapse, failure to have the problem inspected may compromise the structural integrity of your home. 

To learn what to do next, Howard Roofing & Home Improvements explains the causes and remedies for a sagging roof. 

What Causes Your Roof to Sag?

The main cause of a sagging roof is not enough structural support for the load. Still, it’s best to consult a professional contractor to determine the exact cause of the sagging. We list a few reasons for a sagging roof:

• Moisture damage. If you don’t maintain your roof regularly, rain and snow can damage it. To allow water to run off, your shingles and other roof materials must be in good condition. Otherwise, water can penetrate your roof and weaken the underlying structure. Poor ventilation can also contribute to the issue. Without enough airflow in the attic, moisture can accumulate on the underside of the roof. This makes it easier for water to permeate the roof’s surface. 
• Excess weight. Every roofing system is designed to support a specific maximum weight. In cold climates, however, snow can build up on your roof, causing the roof to sag because of the extra weight. Make sure you keep your roof clear of any snow accumulation during the winter. Let a professional do it for you; removing excess snow on your own can further damage your roof if you’re not careful.
• Design flaws. Common roof design flaws may include undersized rafters, insufficient sheathing or too few collar ties. If the roof sags between the rafters or trusses, it’s probably because the sheathing is too thin for the area it covers. Additionally, having more than two layers of shingles and new materials can also cause your roof to sag. In this case, your contractor should remove all the shingles and install a new set.

How Can You Remedy a Sagging Roof?

Depending on the cause, there are plenty of remedies for a sagging roof. For instance, your contractor can install angled braces to correct the sagging itself. Roofers may also provide more support to the walls by installing chains attached to the wall plates and linked in the middle with a turnbuckle. However, widespread sagging related to the framing is another matter. If the roof material is old and needs replacing anyway, your contractor may suggest a roof replacement. 

Are you looking for professional roofers? You can count on Howard Roofing & Home Improvements. We provide top-quality services, from repairs to replacements. Call us today at (636) 296-1057 or fill out our online contact form to request a free quote. We proudly serve homeowners in St. Louis, MO, and the surrounding areas.