Slate is a beautiful and durable natural stone that adds elegance to floors, countertops, walls, and patios. With its rich colors and unique texture, slate is a popular choice for homeowners who want both style and substance. However, like all natural stone, slate requires proper care to maintain its appearance and longevity especially when it comes to professional cleaning and sealing. The answer depends on several factors, including location, use, and exposure. Silver State Floor Restoration would like to break down how often you should get your slate surfaces professionally cleaned and sealed.
Why Slate Needs Professional Cleaning & Sealing
Slate is a porous natural stone, which means it can absorb dirt, grime, moisture, and stains if not properly maintained. Over time, unsealed or improperly maintained slate can:
• Become discolored or stained
• Trap dirt and bacteria in its textured surface
• Develop mold or mildew in damp areas
• Lose its natural sheen and color depth
Professional cleaning removes embedded dirt and bacteria, while sealing adds a protective barrier that resists moisture, staining, and everyday wear.
General Rule Every 1 to 2 Years
As a general guideline, slate surfaces should be professionally cleaned and sealed every 1 to 2 years. This timeline ensures the slate remains in good condition, retains its natural beauty, and stays protected from damage. However, several factors can impact this frequency.
Factors That Affect How Often You Need Slate Cleaning and Sealing
Location of the Slate Surface: High foot traffic and moisture exposure can wear down the seal faster. Clean and seal every 12 to 18 months. Clean and seal annually. Exposed to rain, sun, and seasonal temperature changes these areas should be cleaned and sealed once a year, especially in harsh climates. These vertical or decorative surfaces may only need sealing every 2 to 3 years, depending on exposure.
Level of Use: High-traffic areas wear down faster. If your slate floors see constant foot traffic, aim for annual professional service. Low-use areas, like decorative walls or guest bathrooms, can go longer every 2 to 3 years may suffice.
Type of Slate Finish: Honed slate may show stains more easily and benefit from more frequent sealing. Cleft slate hides dirt but can trap debris in crevices, requiring thorough professional cleaning.
Previous Sealing Quality: If the slate was sealed with a high-quality, penetrating sealer, it might last longer up to 2 years or more. But lower-grade sealers may wear off within 6 to 12 months.
Signs It Is Time for Slate Cleaning & Sealing
Even if you are unsure of the timeline, your slate will show you when it needs attention. Look for these signs:
• Dull or faded appearance
• Stains or discoloration that won’t wipe off
• Water no longer beads on the surface
• Grime buildup in grooves and crevices
• Mildew or mold forming in damp areas
• Slate looks dusty or chalky despite cleaning
If you notice any of these, it is time to call in a professional.
Natural Stone & Tile & Grout Cleaning, Sealing, Polishing & More in Aliante, Centennial, Desert Shores, Eldorado, Enterprise, Green Valley Ranch, Henderson, Lone Mountain Village, North LV, Peccole Ranch, Paradise, Silverado Ranch, Spring Valley, Summerlin, Sunrise Manor, Tuscany Village, Whitney, Winchester & Las Vegas Nevada
Slate is a durable yet porous natural stone that thrives with consistent care. For most households, professional slate cleaning and sealing every 1 to 2 years will keep surfaces looking vibrant, clean, and protected. Need help maintaining your slate surfaces? Contact Silver State Floor Restoration today.
