Struggling with a dirty, blackened terrace? Patio slabs and joints darken quickly from moss, grime, and weather exposure, no matter the material.
As home maintenance experts with years of experience restoring outdoor spaces, we've tested countless methods. The good news: you don't need an expensive pressure washer like a Karcher. This simple, eco-friendly technique using sodium percarbonate and hot water delivers professional results with minimal effort.
- A bucket
- A push broom
- 3 tablespoons of sodium percarbonate
1. Pour 1 liter of hot water into the bucket.
2. Add the sodium percarbonate.
3. Mix well until dissolved.
4. Dip the push broom into the solution.
5. Scrub the slabs and joints thoroughly.
6. Rinse with clean water.
Your terrace will be free of black marks, moss, and grass—looking fresh and new. This method is easy, fast, cost-effective, and safer than bleach or acids. It's ideal for whitening slabs and coping stones around pools too.
This reliable technique works on all terrace types: tiled, natural stone, concrete, marble, stoneware, porcelain, cement, gravel slabs, pavers, bricks, raw or reconstituted stone, granite, and more. It's also great for pool decks, paths, curbstones, balusters, and garden paths.
Always wear protective gloves. Rinse thoroughly, especially on limestone surfaces, to ensure safety and longevity.
- No sodium percarbonate? Substitute with 2 tablespoons of soda crystals for similar results.
- For ongoing maintenance, use this regularly to prevent moss buildup from humidity. Pair with baking soda, a natural fungicide, for enhanced anti-moss protection.
