Asphalt shingle roofing covers many homes in the United States and the shingle you pick decides how your roof performs in wind and snow for the next 20 to 30 years. A shingle that holds up fine on a low frequency ranch in Phoenix would not necessarily exist in an Idaho winter with repeated thawing cycles and heavy roof snow loads.
This guide breaks down the shingle types the grades that in fact matter and the features worth paying for before a contract gets signed.
What Are Asphalt Shingles Made Of
Asphalt shingles are built from a fiberglass mat saturated with waterproofed asphalt and topped with mineral granules. Those granules do more than add color. They block ultraviolet light from breaking down the asphalt underneath and they control how much heat the roof absorbs.
Granule reflectivity is measured under the federal ENERGY STAR roof products program and shingles that meet the threshold qualify for the label. A cool rated shingle reflects more solar heat which matters on a south facing slope even in a cooler climate like Idaho. It would not cut a summer cooling bill the way it does in Phoenix but it does slow granule breakdown over time.
What Types of Asphalt Shingles Are Available
There are three main types of asphalt shingles on the market and understanding them is the foundation of any asphalt shingle roofing decision.
Three tab shingles are flat and lightweight. Architectural shingles laminate two or more layers together for a dimensional look.
Luxury shingles mimic slate or cedar shake and weigh close to double what a three tab weighs.
| Shingle Type | Wind Rating | Expected Lifespan | Best Fit |
|---|---|---|---|
| Three Tab | Up to 60 mph | 15 to 20 years | Sheds rentals detached garages |
| Architectural | Up to 110 mph | 25 to 30 years | Most Idaho primary homes |
| Luxury/Designer | Up to 130 mph | 30 to 50 years | Steep roofs and high end resale |
Architectural shingles most often carry a Class 4 impact rating under UL 2218 which matters anywhere hail hits on a regular basis. That single certification is worth asking about by name on any bid.
What Do Asphalt Shingle Grades Actually Mean?
- Shingle grade
Mainly shorthand for how much asphalt and fiberglass mat goes into the shingle.
- Heavier shingles
Asphalt shingle roof cost can be higher per bundle because they use more raw material and usually carry a longer manufacturer warranty.
- Grade affects price and durability
For asphalt shingle roofing more than any single style choice.
- Grading is not universal
Manufacturers use different grading systems so a premium shingle from one brand may weigh less than a standard product from another.
- Compare actual specifications
Check the weight per square printed on the wrapper, along with the wind and impact rating rather than relying only on marketing tier names.
How to Choose Asphalt Shingles for Your Roof
Choosing the right shingle comes down to matching the wind and snow rating to your roof exposure and pitch. Idaho adopted residential building code sets a wind design speed near 115 mph across many dominions and a roof snow load around 25 pounds per square foot in many areas of the state. Those numbers set the floor a shingle requires to live not the ceiling.
- Check your roof pitch. Anything under a 4:12 slope needs a different underlayment approach no matter which shingle you pick.
- Match the wind rating to your exposure. A home on an open ridge needs a higher rating than one tucked behind mature trees.
- Confirm the impact rating if hail has hit your zip code before. Ask for the UL 2218 class in writing.
- Compare algae resistance warranties. Shaded north Idaho roofs grow streaks faster than baked south facing ones.
- Get the manufacturer full system warranty not just the shingle warranty. Most require certified installation.
Which Asphalt Shingle Features Matter Most
Sealant strip quality and granule adhesion matter more than color or brand name once real winters enter the picture. A shingle with a weak sealant strip can lift in a wind event even when the printed wind rating looks strong.
Look for a self sealing adhesive strip rated for cold weather activation and a fiberglass mat rated at least Type 3020. Algae resistant granules matter most on north facing slopes that stay damp longer after a storm passes. These details rarely come up in a sales pitch so ask about them directly.
What Are the Best Asphalt Shingles for a Roof in Snow Country
The best asphalt shingles for a roof that sees regular snow and defrosting cycles are architectural shingles rated for at least 110 mph wind with a UL 2218 Class 4 impact rating. That combination handles the two failures we see most on Idaho roofs: wind lift at the edges and granule loss from repeated freezing.
Three tab shingles still earn their place on detached garages and rentals where the roof has a short planned life. They are not the right call for a primary residence expected to last three decades.
Mistakes to Avoid With Asphalt Shingle Roofing
The most common mistake is buying by color before checking the wind and impact rating. A shingle that looks right in the sample book can still be the wrong product for an exposed roof plane.
Skipping proper ventilation is the second mistake. A roof traps heat in the attic without ridge and soffit vents working together and that trapped heat shortens shingle life regardless of the grade purchased.
The third mistake is hiring the lowest bid without checking whether it includes certified installation. Many manufacturer warranties get voided by uncertified crews.
Questions Homeowners Ask About Asphalt Shingle Roofing
How long does asphalt shingle roofing actually last in Idaho?
Most architectural shingles run 25 to 30 years in this climate when installed with proper attic ventilation and ice and water shield at the eaves.
Do three tab shingles ever make sense on a house?
Yes on a low slope secondary structure or a short term rental where lifespan matters less than upfront cost.
Is a higher wind rating always worth the extra cost?
Only if your roof sits in an exposed spot. Match the rating to your actual site not the highest number on the shelf.
Does shingle color affect how long it lasts?
Darker shingles run slightly hotter which can speed up granule loss a little but the effect is small next to ventilation and installation quality.
Final Advice Before You Choose
Pick the shingle by its wind rating its impact class and its warranty terms first and its color last. Those three numbers say more about how the roof performs over the next two decades than any brand name on the wrapper.
Get Roofing Help From Evergreen General Construction
Evergreen General Construction #1 LLC installs and scrutinizes asphalt shingle roofing across the region and can walk a householder through which wind and impact rating really fits their roof.
Call (208) 695 3167 or email 1evergreengc@gmail.com for a written invite that names the exact shingle brand and rating until any work starts. A quote with the special product recorded is the simplest way to confirm you are getting what you paid for.
Sources
- ENERGY STAR Roof Products Program — U.S. EPA.
- Idaho Division of Building Safety — Adopted Codes.
- Whole Building Design Guide (National Institute of Building Sciences) — UFGS Section 07 31 13 Roof Covering Standards including ASTM D7158 and UL 2218.
