Sealing vs. Washing — What Your Surfaces Need Before Freezing Temps
As winter approaches, homeowners face a familiar question: should you wash your exterior surfaces, seal them, or both? From concrete driveways to wood decks and brick patios, every surface on your property reacts differently to cold temperatures and moisture. Knowing when to clean and when to seal can make the difference between a protected, lasting surface — and one that suffers winter damage.
1. The Purpose of Washing
Washing removes surface-level contaminants like dirt, algae, mildew, and road grime. These materials hold moisture against your surfaces, creating a perfect environment for damage when freezing weather hits. A professional wash ensures your siding, walkways, decks, and driveways are clean, dry, and ready for the next step in protection.
Fall is the ideal time to wash because temperatures are mild and humidity is lower. This allows water to evaporate quickly, preventing residue and reducing the risk of streaks or re-growth before winter.
2. The Purpose of Sealing
Sealing goes a step further — it protects the material itself. Sealers penetrate or coat the surface to create a barrier against moisture, salt, and staining. Once sealed, surfaces become more resistant to cracking, discoloration, and freeze-thaw damage. Depending on the type of sealer, the finish can be completely natural or high-gloss and decorative.
Sealing is most effective after washing. Without cleaning first, the sealer traps dirt and organic matter beneath the surface, reducing its ability to bond properly and shortening its lifespan.
3. When to Wash, When to Seal
If your surface has visible buildup — like green algae, black streaks, or general grime — start with washing. This step restores the surface’s appearance and reveals any areas that need repair or sealing.
If your concrete, brick, or wood looks dry, porous, or faded, sealing is the next logical step. Sealing should always follow a complete wash to ensure a strong, uniform bond.
For most homeowners, the best approach before winter is wash first, seal right after — while temperatures are still above freezing and the surface is clean and dry.
4. Understanding Different Surfaces
Concrete: A penetrating sealer protects against salt, water, and freeze damage while keeping a natural appearance.
Stamped Concrete or Decorative Surfaces: A high-gloss acrylic sealer enhances color and adds a protective shine.
Wood Decks and Fences: A natural wood sealer prevents cracking, warping, and moisture absorption while maintaining the wood’s natural tone.
Brick and Stone: A breathable sealer blocks moisture without trapping it, protecting the surface from spalling or flaking.
5. Timing Is Everything
Both washing and sealing depend on the weather. Ideal conditions are dry days with temperatures above 50°F and no heavy rain or frost for at least 24 hours afterward. Starting in the fall ensures your property is fully protected before winter’s moisture and cold arrive.
6. Long-Term Payoff
Taking the time to wash and seal your surfaces before freezing temps hit can save thousands of dollars in future repairs. Clean, sealed materials resist stains, maintain color, and stand up better to the elements. They’re also easier to maintain year after year.
7. A Professional Touch
While DIY products exist, professional-grade washing and sealing deliver more consistent, longer-lasting results. Technicians use specialized cleaners, application tools, and high-performance sealants designed for your specific surface type and climate.
Wrap-Up:
When temperatures drop, protecting your home’s exterior surfaces isn’t optional — it’s essential. Washing removes the grime; sealing locks out the moisture. Together, they keep your property looking great and performing well through every season. For expert surface care that lasts, trust TLC: Making It Easy — making your home cleaner, safer, and better protected year-round.