Shingle roofs are the most common roofing material in the United States. It can last for 20 to 30 years, depending on certain factors, such as shingle type, workmanship, weathering, and more. With proper upkeep, you can extend your asphalt roof lifespan and delay potential damages.
In this post, we discussed the lifespan of shingle roofs, factors affecting their longevity in Mankato, MN, and roof replacement signs you should watch out for. We also answered some questions below, which you might also be wondering about!
What is the lifespan of a shingle roof?
How long do asphalt shingles last on a house, you ask? A typical shingle roof can last between 20 and 30 years, while some may have a shorter lifespan of 15 years.
The rule of thumb is that shingle roofs should last around 80% to 85% of their stated lifespan. On average, here’s the average lifespan of asphalt shingle roofing in North Mankato, MN based on type:
- 3-tab shingles. Also known as traditional shingles, 3-tab shingles are the most affordable shingle roof and can last for 15 to 20 years.
- Architectural shingles. Architectural shingle roofs can last for 20 to 30 years. If you’re choosing between 3-tab and architectural shingles, the latter is the best option for longevity, though it has a higher price point.
- Premium shingles. Also called ‘designer shingles’, premium shingle roofing can last for 25 to 40 years. Aside from its longer lifespan, premium shingles can also mimic other roofing materials like slate tiles or cedar shakes.
- Performance shingles. Performance shingles, also known as impact-resistant shingles, can last for 25 to 30 years. It’s designed to have better solar reflectivity, hail resistance, and wind resistance, ideal for Mankato homes.
Roofing material comparisons by lifespan
Each roofing material has varying longevity and endurance against the harsh Minnesota weather. Below, we compared the lifespan of the most common roof types so you can choose the best roofing materials for long-lasting protection:
Roof lifespan comparison: asphalt vs. metal
Metal roofing can last for 40 to 70 years, which is way longer than shingles’ 30-year lifespan. Due to its durability, the cost of metal roof installation is also higher than shingles at around $7 to $12 per square foot.
Roof lifespan comparison: Shingle roof vs. tile roof
When it comes to shingle roof vs. tile roof longevity, almost all tile roofing materials last the longest. For example, clay tile roofs can last for 50 to 100 years while slate tiles have a lifespan of 75 to 100+ years. Which roofing material lasts the longest, you ask? Nothing beats tiles and slates in terms of longevity.
Roof lifespan comparison: Shingle roof vs. shakes
Shingles and shakes tend to have similar lifespans, with shakes lasting for 20 to 40 years. This isn’t far from asphalt shingles which usually last for 30 years.
Roof lifespan comparison: Shingle roof vs. Built-Up Roofing (BUR)
Built-Up Roofing or BUR is made of layered asphalt and ply sheets to create a durable material. Overall, they last just as long as asphalt shingles around 20 to 30 years.
What affects the durability of a shingle roof?
The longevity of a shingle roof is affected by several factors, not just its quality or manner of installation. Below are some of the factors that contribute to roof aging and deterioration:
1. The impact of weather on roof lifespan
How climate affects roofing longevity is an important consideration when assessing how long the material will last. For example, harsh winter conditions, high winds, heavy downpours, and intense sunlight will all cause wear and tear even on the most durable shingle material.
UV rays from the sun break down asphalt while the freeze-thaw cycle during Mankato winters can form ice dams, which is one of the common causes of roof damage.
Overall, the more extreme the weather is, the faster a shingle roof ages.
2. Roof maintenance and longevity
Roof inspections and maintenance are the best way to spot early signs of roof damage before it’s too late. From missing shingles, signs of water damage, clogged gutters, and more – the earlier you have them fixed, the more you extend the roof’s lifespan.
We also recommend scheduling professional roof inspections and maintenance in North Mankato, MN to ensure that your roof is in the best shape. It’s ideal to get annual inspections before winter to prepare your roof for the harsh conditions.
3. The role of ventilation in roof lifespan
Trapped moisture in your attic will harbor mold and wood rot. Worse, these aren’t easily visible until the damage is already extensive. Before you know it, widespread wood rot due to trapped moisture has already weakened the structure underneath your shingles
At the same time, heat buildup due to poor ventilation will cause premature aging and warping of your shingle roof. This is why we recommend getting energy-efficient roofing options if you’re planning to upgrade your current roof.
4. Roofing underlayment impact on shingle lifespan
Underlayment is the protective layer installed underneath your roof shingles to block moisture. Low-quality underlayment may degrade fast, exposing your shingle roof to trapped moisture, leaks from iced dams, and other damage that shortens its lifespan.
5. The impact of roof pitch and valley
Your shingle roof’s design also has an impact on its longevity. For example, you’re a flat roof pitch is more prone to water drainage issues than pitched roofs.
On the other hand, roof valleys are also a consideration as closed roof valleys tend to be more prone to wear and tear. It’s because the lack of a metal flashing between two sloped sections will allow direct contact with ice, rainwater, and dirt that will degrade the shingles faster.
How to know when a shingle roof needs replacing
Knowing when to replace your asphalt shingle roof is crucial, so you can secure your home while preventing repetitive and costly repairs. With that, here are tell-tale signs that you’re due for shingle roof replacement in North Mankato, MN:
- Curling or buckling shingles. Shingles are designed to lie flat on your roof. When they start to lift upward or form peaks and valleys, it indicates that the shingles have already reached the end of their service life.
- Old shingle roofing. For shingles, the average age of a roof before replacement ranges from 25 to 30 years. If your asphalt roof is older or almost the same age, you should consider a replacement soon.
- Granules in gutters. The presence of large amounts of granules on your gutters means that the shingle material is already deteriorating. This increases the risk of leaks and water damage, which could compromise your ceiling and walls if not addressed right away.
- Widespread missing shingles. If there is a large portion of your roof with missing shingles, getting a replacement would be a smart move. If not, your roof deck will be exposed to extreme outdoor elements, more so during the harsh Mankato winters.
- Sagging roof. Severe roof sagging is a tell-tale sign that your shingle roof already has extensive damage. This poses a risk as sagging roofs can cave in, especially during heavy snowfall – something that happens regularly in Mankato and Madison Lake areas.
How to extend the life of a shingle roof
Knowing how to increase the life of a shingle roof will save you from repetitive and costly repairs. If you have a shingle roof, you should follow these best maintenance tips for shingle roofs:
- Schedule regular maintenance. Preventative maintenance for shingle roofs in Madison Lake, MN, and Mankato, MN is always the best way to extend your roof’s lifespan. This way, a licensed roofing company like Boelter Is Better can spot and repair damages before they require a full replacement.
- Remove moss and algae regularly. Preventing moss and algae on shingles will ensure there’s no trapped moisture that could rot the material. You can use a soft brush and diluted detergent for this or you can simply call a professional roofer to handle the maintenance job once a year.
- Trim overhanging branches. Branches touching or rubbing on your roof will cause wear and tear on the asphalt shingle. Not only that, these branches will also become pathways for critters that will damage your roof and infest your attic.
FAQs on shingle roof longevity
Do thicker shingles last longer?
Thicker shingles tend to be more durable and resistant to harsh outdoor elements. It can last for up to 30 years with proper upkeep and maintenance.
Do shingle roofs last longer in certain climates?
Yes, certain climates will impact the lifespan of shingle roofs. It lasts the longest in mild to moderate weather that causes minimal wear and tear. Meanwhile, shingle roofs tend to deteriorate faster in windy, very hot, and humid conditions.
How often should a shingle roof be replaced?
Shingle roofs may need to be replaced every 20 to 30 years, depending on the exact condition of the asphalt material. To confirm if your shingle roof is due for replacement, you can contact local roofing contractors in North Mankato, MN for a professional inspection.
Does color affect shingle lifespan?
Yes, shingle color will have a direct impact on its lifespan. Darker shingles absorb more heat, which makes them prone to wear and tear, UV damage, and thermal stress than light-colored asphalt shingles.
What are the best roofing companies in North Mankato, MN?
If you’re in North Mankato, MN, Boelter Is Better is one of the leading roofing companies to consider. We’ve been in the industry for 30+ years with top-notch roof warranties and expected lifespan in the region.
How long do asphalt shingles last in Madison Lake, MN?
Madison Lake gets cold winters and strong winds, much like most of Minnesota. In this case, shingle roofs in Madison Lake, MN often last anywhere from 15 to 20 years for 3-tab types and up to 40 years of premium shingles.
