
Roof moss removal
in Genval
We remove moss and lichen without damaging the tiles, then apply a water-repellent treatment that stops water sitting on the roof and keeps the moss from coming back. We do this in Genval from our base in Walloon Brabant, always with a costing visit before you commit to anything.

BeforeAfter
The context in Genval
Why here in particular
The damp coming off the water and the wooden roof overhangs call for particular attention to exposed roof timbers. So we adapt the equipment and the method rather than running a standard protocol.
In Belgium a north-facing slope takes moss within three to five years. Moss holds water, freezes in winter, lifts the tiles and eventually lets damp into the roof timbers.
- Quote
- Priced after a site visit, free of charge and with no obligation.
- Duration
- 1 to 2 days depending on the area and the access.
- Call-out
- Included in Genval and neighbouring municipalities
How it runs
How the job runs
The same protocol everywhere, adapted to what the visit reveals on site. Nothing is decided from the pavement.
- Tarpaulins over the surroundings and the planting
- Low-pressure cleaning matched to the substrate
- Fungicide and algicide treatment
- Clearing the gutters and downpipes
- Water-repellent treatment with a beading effect
- Before / after photos handed over with the invoice
Inspection
Condition of the tiles, the ridge tiles, the flashings and the gutters. We photograph everything and show it to you.
Low-pressure cleaning
No 200-bar lance on a porous tile: low pressure, and a rotary brush where it is needed.
Anti-moss treatment
Fungicide applied over the whole surface, contact time respected.
Rinsing and clearing away
Full rinse, gutters cleared, waste taken away.
Water-repellent treatment
A colourless or coloured impregnation that beads water off and slows recolonisation.
Frequently asked questions
Roof moss removal in Genval
The questions we get asked most often before this kind of job.
Can a natural slate roof be treated?
Yes, but without a film-forming water-repellent treatment: slate has to stay breathable. We match the product to the material.
And if some tiles are broken?
We replace them before the treatment. That is priced separately, per piece, and you approve it before we fit anything.
Do you work in winter?
Cleaning yes, the water-repellent treatment no below 5 °C. We push the second phase back rather than botch it.
Do you come out to Genval with no extra call-out charge?
Yes. Genval is one of our 17 municipalities: the call-out is included in the quote, not added at the bottom of the invoice.
Other work in Genval
While we are on site
Combining two jobs in one visit brings the invoice down. We suggest it when it makes sense, never to pad the quote.
Roof moss removal in the neighbouring municipalities
Your job in Genval
On-site visit, detailed costing within 48 working hours, with no obligation on your part.
