Grön-Fri Roof & Facade

Clean roofs without algae, moss, and growth

Algae, moss, and lichen take hold on your roof, and sweeping, scraping, rinsing, or washing won’t remove the growth with lasting results. Their microscopic roots and spores remain in the roof tiles, and as soon as they get nutrients and light, they start growing again. There’s also a high risk that attempts to remove the growth mechanically or with a pressure washer will do more harm than good.

Why choose Grön-Fri

Make your roof last longer

Skipping cleaning lets moss and lichen retain moisture; tiles absorb water, frost cracks them, and leaks can lead to rot, reduced load-bearing capacity, and mold in the underroof.

Eco-friendly roof cleaning

Grön-Fri cuts off the nutrient supply for algae, moss, and lichen so the growth disappears; the product is biodegradable and, when handled correctly, harmless to people and animals.

We’ll help you with Grön-Fri

The effect is slow but long-lasting: the growth dies immediately but is rinsed away over 1–2 years. If you buy Grön-Fri from us, you’ll get support and equipment or help connecting with a contractor.

Want to know more?

Contact us for more information and a demo!