Cleaning and Protecting an Outdoor Sandstone Terrace with Pool

The Challenge

An outdoor sandstone terrace surrounding a pool was plagued by algae growth, limescale deposits from pool water, and UV fading, making it unsafe and unattractive.

Diagnosis

Inspection revealed significant algae growth and limescale buildup, along with fading colors due to prolonged sun exposure.

The Solution

1. Phase 1: Algae and Limescale Removal
   Products: Lithofin KF Algae-Remover
   Dilute Lithofin KF Algae-Remover 1:5 with water. Apply generously to affected areas and allow to work for 30 minutes. Scrub with a stiff brush and rinse with water.
   Duration: 4 hours
2. Phase 2: Protection
   Products: Lithofin KF Stain-Stop
   After cleaning, apply Lithofin KF Stain-Stop evenly across the surface. Allow to penetrate for 15 minutes, then wipe off excess. Let cure for 24 hours.
   Duration: 1 day

Products Used

• Lithofin KF Algae-Remover
• Lithofin KF Stain-Stop

Estimated cost: approximate €200-€300

The Result

The sandstone terrace was cleaned of algae and limescale, and a protective layer was applied to prevent future growth and fading.

Ongoing Maintenance

Biannual cleaning with Lithofin KF Algae-Remover and reapplication of Lithofin KF Stain-Stop every year.

Key Takeaway

Regular cleaning and protective treatments are vital for maintaining outdoor stone surfaces exposed to environmental elements.