4 Main Causes of Roof Sagging

Roof sagging is an abnormal roof condition that requires the expertise of a general construction company or a roofing professional. Older roofs are typically more susceptible to sagging since they have weakened structures and are already worn down.


Here are four main causes of roof sagging.

Leaks

Heavy rain and snow can cause severe damage to the roofing materials and structural supports. A minor water leak can affect a small section and then spread quickly to other parts of your roofing system. If left unattended, leaks can lead to significant water damage and wood rot. Once the wooden components of your roof developed rot, your roof could also start sagging. Call your roofer to repair leaks immediately.

Excessive Load

If you want to switch from asphalt shingles to slate tiles, your roofing and home remodeling contractor will need to make sure your roof can adequately support the weight of the new material. Slate tiles are heavier than asphalt shingles. If your roof is not built to withstand such a load, it might sag. In other cases, snow buildup can create the excess load that makes a roof sag.


Sometimes, roofers simply install new shingles over old ones — a method called re-roofing. If the contractor did not properly consider the condition of the entire roof, the new layer of shingles could weigh down the roof and cause sagging.


Problematic Roof Design


A flawed roof design or construction can lead to inadequate structures or inaccurately measured roofing components. Over time, these mistakes will catch up with your roof and result in sagging.

Foundation and Wall Issues

Damaged walls and foundations can also impact your roofing system. In this case, it’s best to also work with exterior home remodeling services to ensure adequate repairs to these parts of your home.


When you work with Timberland Exteriors, you can expect superior craftsmanship for your roofing project. Call us at 651-439-1760 (Maplewood) or 218-849-6675 (Detroit Lakes). You can also fill out this contact form for a free consultation. We serve clients in Minneapolis, MN, and other nearby areas.

Schedule Your

Free Estimate

Contact Us

Convenient Financing Options

We Make Quality Exterior Remodeling Affordable

Interior view of a room with large glass sliding doors overlooking a patio and a house.
October 8, 2025
Choosing the right doors for your home is more than just a design decision; it impacts security, energy efficiency, and overall curb appeal. Doors are a major focal point for any home, and the right choice can enhance both the look and functionality of your living space.
Rear view of two-story house with brown siding and multiple windows. Blue sky and green grass.
September 11, 2025
When it comes to home improvement, few elements make as lasting an impression as your windows. They not only define the character of your home from the outside but also play a crucial role in comfort and energy savings on the inside. Choosing the right windows can enhance your property’s curb appeal,
Beige soffit and gutters on a brick house with a dark shingled roof against a blue sky.
August 15, 2025
When it comes to roof maintenance, most homeowners focus on shingles, flashing, or gutters. But two of the most critical—yet often overlooked—components are the soffit and fascia. These structural elements play a silent but vital role in maintaining your roof’s integrity, ventilation, and overall curb appeal.
A brick house with a gutter on the side of it
July 18, 2025
Gutters play a critical role in the overall health of your home, protecting both its exterior and the foundation. While they are often overlooked, regular gutter maintenance is essential to ensuring that your home remains safe, dry, and structurally sound.
A white house with black shutters on the windows
June 10, 2025
Getting an instant roof quote can save you time and give you a clearer picture of what to expect when it comes to costs.
May 12, 2025
Your roof is one of the most critical components of your home, providing protection from the elements and maintaining the integrity of your living space.
Two men are working on the roof of a house.
April 30, 2025
A roof is one of the most essential parts of your home. It keeps you protected from the elements and plays a critical role in the overall integrity of your house.
A group of people are standing in front of a house under construction.
May 8, 2024
Preparing your home for a roof installation is a crucial step to ensure that the process goes as smoothly as possible. Taking the time to get your home ready can significantly impact the efficiency and success of your roofing project.
A person is opening a window with a white handle.
April 26, 2024
In today’s environment-conscious market, energy-efficient windows have become a core component of home improvement projects, particularly in areas known for their harsh climates, such as Maplewood, MN.
A large white house with a black roof and red shutters
April 22, 2024
As the remnants of winter melt away and the first blooms of spring start gracing us in Maplewood, MN, it’s a signal for many homeowners to start contemplating home improvement projects that were put on hold during the colder months.
Show More