💰 When it is time to replace your roof, the shingle you choose matters. But the range of options, quality levels, and price points can be confusing. Understanding what you are paying for helps you make a better decision, whether you are replacing now or preserving what you have.
🏠 The three main types of asphalt shingles
Builder-grade (3-tab shingles)
These are the most basic and least expensive asphalt shingles. They are flat, have a uniform appearance, and typically carry a 20 to 25 year manufacturer warranty. They have the least amount of asphalt and the thinnest mat. In New Brunswick’s climate, builder-grade shingles often show aging signs within 8 to 12 years.
Architectural (laminated shingles)
These are thicker, have a dimensional appearance, and use more asphalt in their construction. They typically carry a 30 to 50 year warranty. The heavier construction provides better wind resistance and more granule coverage. Most New Brunswick homes that have been re-roofed in the last 10 years use architectural shingles.
Designer / luxury shingles
These are the heaviest and most expensive asphalt shingles, designed to mimic the look of slate or wood shakes. They have the most asphalt, the thickest mat, and the highest wind and impact ratings. Warranties range from 50 years to lifetime. They are less common in residential NB but are sometimes used on higher-end homes.
📊 What actually affects shingle longevity
Regardless of which type you choose, the same aging mechanisms apply. The GoNano technical white paper explains that asphalt binder aging is driven by:
- Oxidation: The primary irreversible aging pathway. Oxygen reacts with asphalt compounds, making them stiffer and more brittle.
- UV exposure: Sunlight accelerates oxidation. South-facing roof slopes age faster than shaded slopes.
- Heat: Higher temperatures speed up the chemical reactions that age the binder.
- Granule loss: As granules detach, more asphalt is exposed to UV, creating a feedback loop.
- Freeze-thaw cycling: Expansion and contraction stress stiff shingles, causing cracks and granule loss.
- Biological growth: Algae, moss, and lichen feed on limestone filler and trap moisture.
A higher-quality shingle starts with more asphalt and better granule coverage, so it takes longer for these mechanisms to reach the failure point. But no shingle is immune. Even the most expensive architectural shingle will eventually lose granules, stiffen, and become brittle.
⚠️ Why a thicker shingle is not always the answer
Thicker shingles cost more, but they do not change the fundamental aging process. They just start with more material to lose. The oxidation, UV damage, and granule loss still happen. The timeline is longer, but the trajectory is the same.
This is why preservation is relevant regardless of shingle quality. A treatment that supports the asphalt binder and helps maintain granule adhesion can benefit a 15-year-old architectural shingle just as it can benefit a 10-year-old builder-grade shingle. The question is not which shingle you have, but whether it is still in the preservation window.
🔧 What to consider when choosing replacement shingles
- Wind rating: New Brunswick gets strong wind events. Look for shingles rated for at least 130 mph.
- Impact rating: If hail is a concern in your area, look for UL 2218 Class 3 or Class 4 rated shingles.
- Algae resistance: Some shingles include copper granules that resist Gloeocapsa magma growth.
- Warranty terms: Read the exclusions. Is it prorated? Is it transferable? Does it cover labor or just materials?
- Weight: Heavier shingles require a roof structure that can support the load. Have your deck inspected before choosing a heavier product.
✅ Before you replace, get assessed
If your current roof is showing signs of aging but has not failed structurally, it may be worth assessing before committing to replacement. A preservation treatment costs a fraction of a new architectural shingle roof and may extend the life of your current shingles by several years.
If your roof is not a candidate, we will tell you. If it is, you have a choice to make with honest information.
Frequently Asked Questions
Are architectural shingles worth the extra cost?
In most cases, yes. They last longer, resist wind better, and look better than 3-tab shingles. The cost difference is modest compared to the total roof replacement price.
Can a high-quality shingle still benefit from preservation treatment?
Yes. The aging mechanisms (oxidation, UV, granule loss) affect all asphalt shingles regardless of quality. Treatment supports the binder and granule adhesion, which benefits any asphalt shingle that is still in good structural condition.
How do I know if my current shingles are worth preserving?
An assessment can tell you. The decision depends on the shingle condition, age, exposure, granule loss, and structural integrity, not just the brand or type.
Video
Watch: Shingle Quality Matters: What New Brunswick Homeowners Should Know Before Replacing
Tap the play button to watch this short roof preservation video.
See also
Explore more NanoSeal NB resources and updates:
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