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Yes, but in the Hill Country it is light work done at the right time. Asphalt needs sealed cracks, clear drainage and gentle de-icing before and during our short freeze season. Most of the work happens in fall, before the first freeze. If you already know you need help, see our guide to winterize your asphalt driveway or call (210) 326-5707.
Reviewed by Courtnay Brooks, Owner of C. Brooks Paving and a fourth-generation paving professional with 23+ years of experience.
In this article: what winter does to asphalt, what a Texas winter looks like by the numbers, a fall prep checklist, safe de-icing, what to skip, and answers to common winter questions.
Key Takeaways
- Water is the real enemy, not cold. Damage starts when water in cracks freezes, expands and pries the asphalt apart.
- Our freeze season is short. San Antonio averages about 12 to 15 freezing days a year, mostly between late November and late February.
- Fall is the time to act. Fill cracks and sealcoat while days still run above 50°F.
- Go easy on salt. Most salts stop working around 15°F, and chloride runoff can harm pavement and plants. Sand gives traction without the downside.
- Check after every hard freeze. New cracks and soft spots are cheap to fix in spring and expensive to ignore.
What Does Winter Do to Asphalt?
Winter hurts asphalt through water, not just cold air. Asphalt handles low temperatures well when the surface is sealed and the base is dry. Problems start when water gets in through cracks and then freezes.
The Freeze-Thaw Cycle
Water seeps into a small crack during the day. At night it freezes and expands by about 9 percent. The ice pushes the crack wider. When it thaws, more water flows into the bigger gap. Each cycle repeats the process, and a hairline crack can turn into a pothole within one or two winters.
Why the Base Matters
Water that reaches the base is the bigger threat. A wet, soft base cannot hold up the asphalt above it. On clay soils toward Seguin and San Marcos, wet ground also swells and shrinks, which adds stress to the surface.
Brittle Asphalt Cracks Faster
Cold makes asphalt stiffer and less flexible. Older, oxidized asphalt that has baked through several Texas summers is already brittle. A sudden hard freeze can open new cracks in a surface like that.
What a Hill Country Winter Looks Like by the Numbers
Our winters are mild most years, which is why people forget about them. The National Weather Service data for San Antonio shows how short and uneven the freeze season is.
| Winter measure | San Antonio average or record | What it means for asphalt |
|---|---|---|
| Average first freeze | About November 30 | Finish crack filling and sealcoating before this date |
| Average last freeze | About February 24 | Plan spring inspections after this date |
| Freezing days per year | About 12 to 15 | Few freezes, but each one can widen open cracks |
| Feb 15, 2021 low | 9°F | Rare deep cold still happens here |
| Longest recent freeze | 4 days 12 hours below 32°F (2021) | Long freezes drive ice deeper into cracks and base |
The first four rows come from the NWS San Antonio climate rankings. During Winter Storm Uri, San Antonio International Airport stayed below freezing for 4 days and 12 hours, according to the NWS February 2021 summary. That was one hour short of the 1951 record.
How to Prepare Asphalt Before the First Freeze
Fall prep is the most useful winter care you can do. Aim to finish by mid-November, before the average first freeze. Here is the order we recommend.
- Walk the surface. Look for cracks wider than a credit card, soft spots, raveling edges and low areas that hold water.
- Clean out cracks. Blow out dirt, leaves and weeds so filler can bond to clean asphalt.
- Fill or seal the cracks. Hot-pour rubberized crack filler stays flexible through cold snaps and blocks water.
- Clear drainage paths. Clean culverts, ditches and gutters so water runs off instead of pooling on the edges.
- Sealcoat if it is due. Sealer needs warm, dry weather to cure, so this is an early fall job.
- Trim back soil and grass. Edges buried under dirt hold moisture against the asphalt.
Cracks are the one item you should never skip. Our asphalt crack repair services use hot-pour filler built for Texas temperature swings.
Can You Sealcoat Asphalt in Winter?
No, not in a normal Texas winter. Sealcoat needs steady warmth to dry and bond. SealMaster, a major sealer maker, calls for 50 degrees and rising for a full 24 hours. TxDOT sets a similar floor for highway seal coats and asks for warmer air with polymer binders.
In the Hill Country, that usually means sealcoating between spring and early fall. A December cold front can drop overnight lows into the 30s and ruin a fresh coat. If your sealcoat is overdue, book it for spring rather than rushing it into winter. Our sealcoating timing and frequency guide covers the full schedule.
Not sure if your surface needs sealing or crack work first? Call (210) 326-5707 and Courtnay will look at it and tell you what makes sense before the cold sets in.
How to De-Ice Asphalt Safely
Ice storms are rare here, but they happen. When they do, a few simple habits protect your driveway and your family.
- Start with sand. Sand gives traction at any temperature and does not break down asphalt.
- Use salt sparingly. Most salts stop working around 15°F. A coffee mug of salt treats about a 20-foot driveway, according to the Minnesota Pollution Control Agency.
- Protect pets and plants. Salt irritates paws and burns grass along the edges of the drive.
- Use a plastic shovel. Metal blades and scrapers gouge the surface and tear sealcoat.
- Skip tire chains on the driveway. Chains chew up asphalt, especially on older surfaces.
You may read that salt cannot hurt asphalt. The asphalt binder itself resists salt, but chloride speeds up freeze-thaw in cracks and corrodes road surfaces over time. Less salt is the safer choice.
What to Avoid With Asphalt in Cold Weather
- Do not pave or patch with hot mix in freezing weather. The mix cools too fast to compact well.
- Do not let water pool. Standing water freezes on the surface and seeps into the edges.
- Do not park heavy trucks on soft, wet edges. Saturated base can crush and crack.
- Do not wait until spring to fix a known crack. One hard freeze can double the repair.
Winter Asphalt Questions We Hear Most
What temperature is too cold to do asphalt?
Most sealcoat products need 50°F and rising for 24 hours, and hot mix paving also needs mild, dry weather so the mix stays hot enough to compact. In the Hill Country, that makes spring through early fall the working season. Small emergency repairs can use cold patch in winter.
What ruins asphalt in winter?
Water in cracks ruins asphalt in winter. It freezes, expands and pries the crack wider with every freeze-thaw cycle. Heavy salt use, metal shovel blades and standing water along the edges add to the damage.
How long does asphalt take to cure in winter?
Fresh asphalt cures slower in cold weather. It hardens enough to drive on within a few days, but it keeps curing for months. That is why we avoid paving in cold snaps and schedule new work for warmer months.
What is the best time of year to seal an asphalt driveway?
In the Texas Hill Country, the best time is late spring through early fall, on dry days above 50°F with warm nights. That gives the sealer 24 hours or more of steady warmth to cure.
Do I need to do anything after a hard freeze?
Yes. Walk the surface once temperatures recover. Look for new cracks, loose edges and potholes. Mark them and get them sealed before spring rains push more water into the base.
Get Your Asphalt Ready Before the First Freeze
Call C. Brooks Paving at (210) 326-5707 to book a fall crack filling and sealcoating check. Courtnay will walk your driveway or lot, point out the cracks and low spots that will cause trouble this winter, and give you a written estimate with no hidden charges. We are open 7am to 6pm, Monday through Sunday, and serve Bulverde and the Hill Country. You can also book professional sealcoating services online for the spring.
C. Brooks Paving
C Brooks Paving
480 Old Boerne Rd, Bulverde, TX 78163
Phone: (210) 326-5707
Hours: 7am to 6pm, Monday through Sunday
Website: cbrookspaving.com
About the reviewer: Courtnay Brooks owns C. Brooks Paving and is a fourth-generation paving professional with 23+ years of experience. Courtnay is on every job site, from the first walk-through to the final roll.
