Cool roof shingles are asphalt shingles made to reflect more sunlight and absorb less heat than standard ones. In Texas, they typically add up to about $0.50 per square foot to the shingle price, and the best time to choose them is when your roof is due for replacement anyway. They come in dark colors too, so you don't have to give up the look you want.
This guide explains how cool shingles work, what they cost, what savings are realistic, which colors and ratings to ask for, and what to check before you sign a contract.
TL;DR
- Cool shingles reflect more sunlight, so less heat reaches your attic. The U.S. Department of Energy says a cool roof can cut annual air-conditioning use in a single-story home in a hot climate by up to 15%.
- Cost: cool asphalt shingles run up to $0.50 per square foot more than conventional asphalt shingles, according to the DOE.
- Color: dark colors can be cool. Look for the rating on the product, not the shade.
- Timing: choose cool shingles at your next replacement, and have the attic ventilation checked at the same time.
- Incentives: federal credits for roofing ended in 2025, but CPS Energy customers in San Antonio can apply for a cool roof rebate on ENERGY STAR certified products.
Table of Contents
- What cool roof shingles are and how they work
- How much energy can you actually save in Texas?
- What cool roof shingles cost
- Choosing the right shingle, color and rating
- Install cool shingles when you replace the roof
- Rebates and incentives for Texas homeowners
- If a storm or insurance claim is behind the replacement
- Our perspective
- Get a cool roof quote from a local team
- Next steps
- FAQ
- Sources
What cool roof shingles are and how they work
A standard dark roof soaks up the sun and passes heat into the attic, which makes your air conditioner work harder. A cool roof does the opposite. The DOE's Guide to Cool Roofs explains that a cool roof reflects sunlight, absorbs less heat, stays cooler in the sun and transmits less heat into the building.
Two numbers describe how cool a roof is:
- Solar reflectance: the share of sunlight the surface bounces back.
- Thermal emittance: how well the surface releases the heat it does absorb.
Both are measured from 0 to 1, and higher is cooler, per the DOE guide. ENERGY STAR says an ideal cool roof has both high reflectance and high emittance.
The temperature gap is large. The California Air Resources Board states that cool roofs can stay up to 50 to 60°F cooler than conventional rooftops during peak summer weather. Central Texas summers are long and hot, so that is the kind of conditions where the difference counts.
Do cool shingles have to be white?
No. The Cool Roof Rating Council explains that many "cool color" products use darker pigments that are highly reflective in the near infrared, the part of sunlight you can't see. That is why a charcoal shingle can still reflect much more heat than an ordinary charcoal shingle.
GAF, for example, says its EcoDark granule technology lets it offer the darkest highly reflective shingle color it makes, Timberline HDZ RS in Charcoal. If you want to see how shade affects heat, our guide to shingle color for heat walks through the options.
How much energy can you actually save in Texas?
The DOE says that in warm or hot climates, swapping a conventional roof for a cool one can reduce annual air-conditioning energy use in a single-story building by up to 15%. It also puts the savings from a cool color roof on a home at up to $0.05 per square foot per year.
CPS Energy, San Antonio's utility, describes a similar range: a properly installed cool roof can reduce cooling demand by 10 to 15 percent.
Here is what that means in practice. Savings depend on:
- Your house. A single-story home with a large roof area compared to its living space gets more benefit than a two-story one.
- Your attic. Insulation and ventilation decide how much of the roof's heat reaches your living space.
- Your ducts. Ductwork running through a hot attic loses cooling, so a cooler attic helps.
- Your usage. The more you run the AC, the more a cooler roof saves.
Savings are not the only benefit. ENERGY STAR notes that a cooler roof improves indoor comfort on hot days, reduces strain on the electrical grid at peak demand, and lowers roof temperature, which can extend the life of roof materials.
What cool roof shingles cost
The price difference is smaller than most homeowners expect. The DOE reports that cool asphalt shingles sell for up to $0.50 per square foot more than conventional asphalt shingles. Some other roofing materials need a reflective coating that adds about $1 per square foot to the installed cost.
Roofers price by the "square," which is 100 square feet. Using the DOE's figure, here is the upgrade premium on typical roof sizes:
| Roof area | Squares | Cool shingle premium (up to $0.50/sq. ft.) |
|---|---|---|
| 1,800 sq. ft. | 18 | up to $900 |
| 2,500 sq. ft. | 25 | up to $1,250 |
| 3,200 sq. ft. | 32 | up to $1,600 |
These figures are the material premium only, calculated from the DOE's upper bound. Your total depends on the shingle line, roof pitch, number of layers to tear off, decking repairs, flashing, ventilation work and permit costs. Our roof replacement process guide lists the line items that tend to surprise homeowners.
An industry guide for Texas puts the extra cost over standard architectural shingles at $0.25 to $0.75 per square foot. Treat the DOE number as the baseline and ask your contractor to price the cool version of the same shingle line side by side with the standard version, so you can see the exact difference on your roof.
Choosing the right shingle, color and rating
Start with the shingle line you were already considering, then look at its cool-rated version. Many manufacturers offer one.
Check the rating, not the color name
Ask for the initial solar reflectance and thermal emittance of the exact product. Two shingles with the same color name can have very different numbers. Products listed as ENERGY STAR certified are the ones that matter for the local rebate described below, and the Cool Roof Rating Council keeps a rated products directory you can search by manufacturer.
For reference, one Texas roofing guide says cool-rated shingles reflect 25 to 40% of solar radiation, compared with 5 to 15% for standard dark shingles. The same guide notes that the 2021 IECC requires cool roofs on commercial buildings in Climate Zones 1 to 3, while for homes it is a best practice rather than a requirement.
Pick for the whole roof system
A shingle only performs as well as the roof under it. Before you pick a color, confirm these with your roofer:
- Impact rating. Hail is a fact of life in Central Texas, so ask about impact-resistant options in the cool-rated line.
- Warranty. Ask what the manufacturer covers and what the workmanship warranty covers.
- Ventilation. Covered in the next section.
- Material alternative. Metal roofing is also highly reflective with the right finish. If you plan to move within a few years, our comparison of asphalt vs. metal roofing in Central Texas shows how each fits a different timeline.
Install cool shingles when you replace the roof
The DOE advises considering cool roofing whenever you plan construction, an energy retrofit or a roof replacement. That is the natural moment, because you are already paying for tear-off, labor and permits, and the premium for the cooler shingle is small by comparison. The DOE also points out that it is rarely economical to replace a mechanically sound roof only to raise its reflectance, and it links a calculator at roofcalc.com to test cost-effectiveness.
If you aren't sure whether your roof is at that point, our 30% rule for repair vs. replace gives a simple way to decide.
Ventilation and insulation come first
A cool shingle on a poorly ventilated attic leaves performance on the table. A Texas attic guide notes that the IRC sets a minimum ventilation ratio of 1 square foot of net free vent area per 150 square feet of attic floor, reducible to 1:300 with balanced upper and lower ventilation or a vapor barrier. It adds that many Texas roofers recommend exceeding the minimum by 25 to 50%, and that blocked soffit vents are the most common cause of poor ventilation, because blown-in insulation drifts into the eaves.
On insulation, the same publisher's Texas guide says homes in IECC Climate Zones 2 and 3 need a minimum of R-38, with R-49 recommended. San Antonio and Houston fall in Zone 2, and Austin and Dallas-Fort Worth in Zone 3.
How the roof deck, insulation and airflow are built up matters as much as the surface. This explanation of warm roof versus cold roof construction shows how those layers work together.
If fascia or soffits are damaged, repair them in the same job so the vents stay open. We handle that under our siding and soffit services.
Rebates and incentives for Texas homeowners
Federal credits are gone. A tax guide for 2026 reports that the Section 25C and 25D credits were eliminated in 2025, so roofing does not qualify for federal credits this year. Texas has no state income tax, so local utility programs are where to look.
In San Antonio, CPS Energy lists a cool roof rebate of $0.08 to $0.20 per square foot. The program page sets these terms:
- You must be a current CPS Energy residential customer.
- The product must be ENERGY STAR certified.
- The application must be received within 90 days of purchase.
- The rebate is limited to one per service account and is based on conditioned square footage, and it cannot exceed the project cost.
Check the CPS Energy cool roof page for current amounts and forms before you buy, because programs change. If you live in Austin or another utility area, ask your electric provider whether it has a similar program. Save your invoice and product paperwork either way.
If a storm or insurance claim is behind the replacement
Many Central Texas roof replacements start with hail or wind damage. If your insurer is paying for the roof, the cool-rated version of the same shingle line is often a small upgrade over the standard one. Two things help:
- Ask your roofer to quote the standard and cool versions of the same line, so the difference is a clear number.
- Know your out-of-pocket share. Our guide to the roof deductible in Texas explains how it works, and the supplement playbook shows how to document items the first estimate missed.
Our perspective
We see the same pattern across Central Texas. Homeowners call after a storm or when the AC can't keep up, and they assume a cool roof means a white roof or a big extra bill. It doesn't. When we replace a roof, the cool-rated version of a shingle line is usually the easiest upgrade to add, because the crew is already on the roof.
Our advice is to decide before the tear-off, not after. Ask for the standard and cool-rated versions of the same shingle priced side by side, and get the ventilation and soffits looked at in the same visit. That way you see the real difference in dollars and can make the call with the numbers in front of you.
It's also why we tell homeowners to collect two or three estimates. We stand behind our Best Price Guarantee, and we'd rather you compare bids with the same shingle line and the same scope on each one. If an insurance payout is funding the job, we help you work through the claim so the roof you get is the roof you need.
Dan
Get a cool roof quote from a local team
If your roof is aging or storm-damaged, we can inspect it, explain your shingle options and give you a free estimate that prices the cool-rated option separately. We serve homeowners across Central Texas, from Schertz to La Vernia, and we can guide you through an insurance claim if storm damage is involved.
Start on our roofing page to request an estimate, or see finished work in the project gallery. If you're comparing bids, use our roofing estimate checklist to line them up fairly.
Next steps
- Check roof age and condition. If it's near the end of its life or storm-damaged, plan the replacement now.
- Get 2 to 3 estimates with the standard and cool-rated version of the same shingle line.
- Ask for the rating numbers (solar reflectance and thermal emittance) for the exact product.
- Have ventilation and insulation checked during the inspection.
- Confirm rebate eligibility with your utility before purchase, and keep the paperwork.
FAQ
Do cool roof shingles come in dark colors?
Yes. Cool color shingles use pigments that reflect the invisible near-infrared part of sunlight, so a dark shingle can still be rated cool. One manufacturer says its charcoal cool shingle is the darkest highly reflective color it offers. Compare the rating on the specific product, not the color name.
How much do cool roof shingles cost?
The DOE says cool asphalt shingles cost up to $0.50 per square foot more than conventional asphalt shingles. On a 25-square roof (2,500 square feet), that is up to $1,250 more in materials. Your final price also depends on pitch, tear-off, decking repairs, ventilation work and the shingle line.
Can I put cool shingles over my existing roof?
It depends on the condition of the current roof, the number of layers, local code and the manufacturer's warranty terms. Most replacements involve tear-off so the decking can be inspected and repaired. A roofer should look at your attic and deck before recommending a method.
Is there a rebate for cool roofs in San Antonio?
CPS Energy lists a cool roof rebate of $0.08 to $0.20 per square foot for residential customers who use ENERGY STAR certified products. You must apply within 90 days of purchase. Confirm current terms on the CPS Energy page before you buy.
Sources
- Guide to Cool Roofs, U.S. Department of Energy
- Science of Cool Roofs, Cool California
- Cool Roofs, ENERGY STAR
- What is a Cool Roof?, Cool Roof Rating Council
- Cool Roof Shingles: California Title 24, GAF
- Energy Efficient Roofing in Texas 2026
- Texas Attic Ventilation and Insulation Guide 2026
- Roofing Tax Credits 2026
- Cool Roofs, CPS Energy Marketplace
- Home Energy Rebates, CPS Energy