Cool roof shingles are asphalt shingles made with special granules or coatings that reflect more of the sun's energy than standard shingles in a similar color, so the roof surface absorbs less heat. Standard shingles use ordinary granules chosen mostly for color and durability. In Oklahoma summers the difference can be real, but it is usually modest compared with what attic ventilation, insulation, and your shingle color already do, and it should be weighed against color choice, product line and cost, not treated as a cure for a hot house.
This page explains the idea in general terms. We do not publish energy-savings numbers, because they vary with the house, the color, the attic, the climate and the ratings of the exact product, and we are not going to guess at yours. Anything specific here should be checked against the manufacturer's literature and the ratings listed for the product on your estimate.
Key takeaways
- A "cool" shingle is built to reflect more sunlight and absorb less than a comparable standard shingle. The idea is about the surface of the roof.
- Color still matters. A light color generally reflects more than a dark one. Cool shingle technology narrows the gap in some colors, and does not erase it.
- A cool roof does not replace attic ventilation or insulation. Those carry much of the load for how hot the upper floor feels.
- Cool roof products are usually offered in a limited set of colors, and not every manufacturer line offers them. Ask for the specific product name and the ratings.
- Ratings (solar reflectance, thermal emittance) are published by manufacturers and by rating programs. Read them from the source; check the manufacturer’s specifications.
- If you live in an HOA, check the rules on color and product before you fall in love with any shingle.
What is a cool roof shingle?
Asphalt shingles are covered with small mineral granules. The granules protect the asphalt underneath from sunlight and give the roof its color. In a cool roof shingle, the granules, or a coating on them, are designed to reflect more of the sun's energy back into the sky. Some of that energy is visible light (what you see as brightness) and some is invisible, near-infrared energy that carries a lot of heat. Reflective technology targets both, and the point is that a shingle can look a certain color and still reflect more heat than an ordinary shingle of that same color.
Two ideas show up in product literature:
- Solar reflectance describes how much of the sun's energy the surface bounces back.
- Thermal emittance describes how readily the surface releases absorbed heat.
Rating programs and manufacturers publish values for these properties. We describe the concept here and do not quote any values, because the numbers belong to specific products and change over time (check the manufacturer’s specifications).
What is a standard shingle?
A standard shingle is the everyday asphalt shingle most roofs have: a fiberglass mat, asphalt, and mineral granules chosen for color and weather protection. Standard shingles are not designed to maximize solar reflectance. Their reflectance depends mostly on color. A dark charcoal shingle will absorb more heat than a light gray one, simply because dark colors absorb more sunlight.
That does not make standard shingles poor products. Most of the roofs in Oklahoma are standard asphalt shingles, and they perform well when installed correctly with proper ventilation. The question is only whether a reflective option adds enough in your situation to justify the choice.
How do cool roof shingles and standard shingles compare?
General tendencies only. Verify anything important against the manufacturer's data for the product you are considering.
| Topic | Cool roof shingles | Standard shingles |
|---|---|---|
| Surface behavior | Designed to reflect more sunlight and absorb less heat | Reflectance depends mostly on color |
| Color options | Often offered in a narrower set of colors; availability varies by manufacturer | Widest range of colors and lines |
| Heat at the roof surface | Generally cooler than a same-color standard shingle in sun | Generally warmer, especially in dark colors |
| Effect inside the house | Can reduce heat gain through the roof; amount depends on attic, insulation and ventilation | Baseline |
| Ratings to check | Solar reflectance and thermal emittance from manufacturer or rating program (check the manufacturer’s specifications) | Not usually marketed on these properties |
| Cost relationship | Often priced higher than comparable standard lines; ask for an itemized estimate | Generally the baseline |
| Hail and wind | Depends on the specific product line, not on the cool feature itself (check the manufacturer’s specifications) | Depends on the specific product line |
| Warranty | Follows the manufacturer's terms for the product; check for any difference | Follows the manufacturer's terms |
| HOA fit | Colors may or may not match approved lists; confirm | Wide set of approved colors usually available |
| Best suited to | Homes with sun-exposed roofs where reflectance matters to you and a suitable color is available | Most homes, especially where color choice or budget drives the decision |
"Often priced higher" is a relationship, not a price. We do not list prices.
Does a cool roof matter in Oklahoma heat?
Oklahoma summers are long, hot and sunny, and that makes the question reasonable. A roof in direct sun gets much hotter than the air. A darker roof absorbs more of that energy and a reflective one absorbs less. That heat does not stay on the roof: some of it moves into the attic, and then toward the living space below.
How much a cool roof helps depends on a handful of things:
- The attic. Ventilation, insulation and any ductwork in the attic have a large influence on how much heat reaches the rooms below. A cool roof sitting over a poorly ventilated attic leaves the bigger problem in place. Read our overview of roof ventilation basics.
- The color. If you choose a light color, you already get much of the reflective benefit. If you want a dark color for the look of the house, a cool version of that color may narrow the gap.
- The orientation and shade. A roof with big south or west exposure sees more sun than a shaded one.
- The house. Insulation, windows, air sealing and the HVAC system affect your comfort and your bills far more than the roof surface alone does.
We are not giving energy-savings figures, and we would be wary of any page that does without knowing your house. If energy performance matters to you, ask the manufacturer for the ratings, ask your roofer about ventilation, and consider talking with an energy auditor or HVAC contractor about the whole house.
There is one more Oklahoma consideration that cool roofs do not address: hail. Impact resistance depends on the shingle line. If hail matters to you, read about Class 3 and Class 4 shingles and ask about impact ratings (check the manufacturer’s specifications) in addition to reflectivity.
Does color still matter with cool roof shingles?
Yes. Color is the first-order decision for how much heat a roof absorbs, and the look of the house is the first-order decision for most people. Cool technology is a layer on top.
In general:
- Light colors reflect more sunlight than dark colors.
- A cool roof version of a dark color typically reflects more than a standard version of that same color, but usually not as much as a light color.
- Some manufacturers offer a cool roof line in only part of their palette, so the color you want may not exist in a reflective version.
- Appearance changes with lighting and with the house; ask to see samples in your own light and on a full roof if possible, and see our guides on dark versus light roof heat and choosing a shingle color.
If you live in an HOA, confirm approved colors and products in writing before ordering.
What are the trade-offs of cool roof shingles?
The potential upside. A cooler roof surface, less heat moving into the attic, and a possible contribution to comfort and to the load on your cooling system. The size of the benefit depends on the house and cannot be stated in general.
The potential downsides.
- Cost. Reflective products are often priced above comparable standard lines. Ask for a line-by-line estimate so you can see the difference.
- Color selection. The palette may be narrower than you want.
- Appearance. Some people find the look of lighter or specially coated colors different from what they expected. Samples help.
- Other product features may differ. A cool roof line may or may not include features you care about, such as higher impact ratings or algae resistance. Compare the whole product, not just the reflectivity.
- Winter. In colder months a reflective roof absorbs less solar heat. Oklahoma winters are shorter and milder than summers, but it is a trade-off in principle.
None of these are reasons to skip the option. They are reasons to ask good questions.
Which should you choose: cool roof or standard shingles?
A way to think it through.
- Start with what bothers you. Is the issue a hot upstairs, a high cooling bill, or just a preference for a lighter look? If it is the heat, check the attic first. Ventilation and insulation problems are common and will limit what any shingle can do.
- Ask what colors are available in a cool version. If the color you love is available, the decision is easier. If it is not, decide what matters more.
- Ask for the ratings for the specific product. Request solar reflectance and thermal emittance for the exact shingle, and read them from the manufacturer's literature or the rating program listing (check the manufacturer’s specifications).
- Compare the full product. Look at impact rating, wind rating, warranty and algae resistance. A cool roof shingle with weaker other properties may be the wrong trade.
- Ask for an itemized comparison. Have your roofer price the cool version and the standard version as separate lines so you can see the difference.
- Check HOA and local rules. Color and product restrictions can decide this for you. Requirements vary by community and by city and county.
- Think about the whole house. If your goal is lower cooling load, a cool roof is one part of the answer, not the answer.
Our crews' view: most Oklahoma homeowners get more from fixing attic ventilation and picking a sensible color than from reflective technology alone, and a cool roof is a good add-on where the numbers and the color fit. That is a general trade view, not a promise about any particular house.
What mistakes do homeowners make with cool roof shingles?
- Expecting a cool roof to fix a hot house on its own. Ventilation, insulation, windows and air sealing matter at least as much.
- Trusting a marketing number without a source. Ask for ratings from the manufacturer's data sheet or a rating program, not from a flyer.
- Choosing by color name instead of seeing samples. Colors differ across brands and look different in sun and shade.
- Ignoring HOA rules. Get color and product approvals in writing.
- Comparing a cool roof line to a different standard line without noticing other differences. Match impact ratings, wind ratings and warranties.
- Skipping the attic. If the attic is hot because of poor ventilation, fix that first or alongside the new roof.
- Assuming all light colors are cool roof products. A light standard shingle is not the same as a rated reflective product.
Frequently asked questions
What makes a shingle a cool roof shingle? Reflective granules or coatings that bounce back more of the sun's energy, including the invisible part that carries heat. The ratings that describe this are published for specific products.
Do cool roof shingles lower my electric bill? It can help, but the amount depends on your house, attic, insulation, HVAC and the specific shingle, so we do not give a figure. Ask the manufacturer for ratings, and consider a whole-house energy review for a real estimate.
Are cool roof shingles only available in light colors? No. Some lines offer reflective technology in a range of colors, including darker ones, but selection varies by manufacturer. Ask for the product's color list.
Is a light roof the same as a cool roof? Not exactly. A light-colored standard shingle reflects more than a dark one because of color, but a "cool roof" product is designed and rated for reflectance. Ask which you are getting.
Do I still need attic ventilation with a cool roof? Yes. Ventilation does other jobs besides managing heat, including moving moisture out of the attic. See our ventilation basics guide.
Will a cool roof change my shingle warranty? The warranty follows the manufacturer's terms for the product. Read the warranty for the specific line, and ask your roofer to point to the wording.
Do cool roof shingles hold up to hail? Hail performance depends on the product line and its impact rating, not on the cool roof feature. Ask for the rating (check the manufacturer’s specifications) and see our page on Class 3 and Class 4 shingles.
Can an HOA stop me from choosing a cool roof shingle? It can restrict colors and products. Check your community's rules and get approval before ordering. Requirements vary by community.
Want help comparing your options?
We can look at your roof, your attic and your color preferences, and put a cool roof option and a standard option side by side on a written, itemized estimate. An inspection tells you about the roof; it does not predict your insurer's decision, and we will not tell you otherwise. Call Total Roof Protection OKC at 405-415-5841, or see our roofing services.