Cedar roofing is one of the most attractive and naturally durable roofing materials available. But how long do cedar roofs last, especially in a region like Rockford, IL where winter snow and summer humidity test a roof’s resilience? The good news is that cedar roofing is built to perform—and with proper care, it can outperform many other common materials.
In this comprehensive guide, Sombreros Roofing breaks down the facts on cedar roof longevity, covering everything from expected lifespan to climate effects, installation quality, maintenance tips, and more. Whether you’re considering cedar for a new build or wondering how much life is left in your existing roof, this blog will help you make a well-informed decision.
The Typical Lifespan of a Cedar Roof
Cedar Roof Longevity at a Glance
On average, a properly installed and maintained cedar shake or shingle roof lasts between 30 to 50 years. In some cases, with premium materials and excellent care, they can last even longer.
By comparison:
- Asphalt shingles: 15–30 years
- Metal roofing: 40–70 years
- Slate roofing: 75–100+ years
So while cedar doesn’t last quite as long as slate, it far outperforms basic asphalt—especially in Rockford’s variable climate, where storms and freeze-thaw cycles can shorten the lifespan of cheaper materials.
Factors That Affect How Long Cedar Roofs Last
1. Climate Conditions in Rockford, IL
Cedar roofs are naturally weather-resistant, but even the toughest materials are influenced by the elements. In Rockford, IL, the mix of snow, rain, wind, and heat fluctuations can accelerate wear if not managed properly.
What helps is cedar’s ability to expand and contract naturally without cracking. This trait makes it more adaptable to Rockford’s changing seasons than many other roofing materials.
Still, high humidity can promote moss or mildew if debris is left on the roof. That’s why regular maintenance is key to extending cedar roof longevity in Illinois.
2. Quality of Cedar Material
Not all cedar shingles or shakes are the same. The longevity of a cedar roof starts with the type of wood and the way it’s processed.
- Old-growth Western Red Cedar is known for its exceptional resistance to decay and pests.
- Clear-grade cedar has fewer knots and defects, meaning fewer weak points over time.
Choosing high-quality, kiln-dried, and pressure-treated cedar increases your roof’s resistance to moisture, insects, and weather-related damage.
3. Installation Expertise
Improper installation can cut a cedar roof’s lifespan in half. Gaps, poor ventilation, or incorrectly fastened shakes can lead to early failure. Ventilation, in particular, is essential—without it, moisture can build up under the roof deck and compromise the wood from below.
At Sombreros Roofing, our installation crews are trained specifically for cedar systems, ensuring every roof we install in Rockford, IL is optimized for durability.
4. Ongoing Maintenance
Maintenance plays a huge role in answering the question: how long do cedar roofs last? Here’s what matters most:
- Cleaning debris and leaves from the roof regularly
- Removing moss or algae as soon as it appears
- Replacing cracked or warped shakes
- Reapplying protective treatments every 5–7 years (if applicable)
According to the University of Minnesota Extension, regular maintenance can significantly extend the life of wood roofing materials—even in challenging climates.
Benefits That Support Long-Term Cedar Roof Performance
Natural Insulation Properties
Cedar provides up to twice the insulating value of asphalt. That reduces heat loss in winter and helps lower cooling costs in summer. Better energy efficiency also reduces stress on your HVAC system, indirectly helping extend your home’s lifespan.
Insect and Rot Resistance
Cedar contains natural oils that deter termites and other insects. It’s also naturally rot-resistant, though keeping it dry and well-ventilated is critical for longevity.
Fire-Resistant Options Available
Modern cedar shingles often come treated to meet Class A or B fire ratings, depending on local code requirements. The U.S. Forest Service has studied fire-resistant wood treatments extensively, showing that treated cedar can meet high safety standards while maintaining aesthetic value.
How to Maximize Your Cedar Roof’s Life
1. Schedule Annual Inspections
Having your roof professionally inspected once a year helps catch issues early—before they lead to costly repairs. Sombreros Roofing offers free roof inspections across Rockford, IL, so you can keep tabs on your roof’s health without guesswork.
2. Trim Overhanging Trees
Falling branches or constant shade can cause roof damage or promote moss growth. Trimming back trees increases airflow and sunlight, both of which help keep cedar dry and healthy.
3. Ensure Proper Ventilation
Poor attic ventilation traps moisture, which can condense on the underside of the cedar shakes. This leads to internal rot. Proper roof ventilation, ridge vents, and intake vents all work together to extend cedar roof longevity.
4. Clean and Treat Every Few Years
While cedar naturally resists decay, routine cleaning and occasional treatment with breathable sealants can extend its color and resistance to fungal growth.
How Long Do Cedar Roofs Last in Historic Homes?
Cedar roofing is a popular choice in historic neighborhoods due to its authentic look and traditional construction. In many of Rockford’s older homes, cedar was the original roofing material.
For homeowners restoring or maintaining these properties, cedar roofing offers not just longevity but also historical accuracy. Choosing the right type of cedar and hiring experienced installers ensures these roofs can meet modern performance standards while preserving their original charm.
Signs Your Cedar Roof Might Need Replacement
Understanding how long cedar roofs last also means knowing when they’re nearing the end of their life. Here are signs to watch for:
- Numerous cracked or missing shakes
- Excessive curling or cupping
- Large patches of moss or rot
- Visible daylight in the attic through the roof
- Leaks or water stains on the ceiling
If your roof is over 30 years old and showing multiple signs of wear, it may be time to consider replacement. Our team at Sombreros Roofing can help assess the condition and recommend the best next steps.
Cedar Roof Longevity: More Than Just Years
Durability is one thing, but cedar roof longevity isn’t just about years—it’s about performance over time. Cedar maintains its appearance longer than many materials, resists storm damage, and provides value well beyond its lifespan through energy savings and added curb appeal.
In Rockford, IL, where weather conditions test every component of your home, investing in cedar pays off with peace of mind and long-term reliability.
Ready to Learn More About Cedar Roofing?
Cedar roofing is a long-term commitment—but it’s one that pays off when done right. From the natural charm to the outstanding performance in Rockford’s climate, cedar is a roofing material built for both style and substance.Want to know where your current roof stands? Get a free inspection now from Sombreros Roofing. We’ll evaluate your cedar roof’s condition, estimate its remaining lifespan, and help you decide on repairs, maintenance, or replacement—always with honesty, no pressure, and your best interest in mind.
