Biocide Treatment in Dundalk
Biocide treatment across Dundalk and the surrounding County Louth area, for homes, apartment blocks and commercial premises.
Why Dundalk properties need this
Dundalk sits between the mountains and the sea, which produces consistently high humidity and correspondingly heavy moss and lichen on roofs. Roof biocide treatment is the service we are asked for most here.
For biocide treatment specifically, humidity between the Cooley mountains and the sea makes Dundalk roofs some of the mossiest we treat — which is exactly why the method matters more than the machine. A low-pressure treatment applied after cleaning that kills moss, algae and lichen at the root and keeps surfaces clear for years.
In Dundalk we usually recommend adding a biocide at the same visit as the clean, because a second mobilisation costs more than the treatment does.
- Kills the spores and root filaments cleaning cannot reach
- Typically two to four years before regrowth is visible
- Applied at the labelled rate with drains and planting protected
- The safe way to deal with heavy roof moss
- Not a sealer — it does not change the surface finish
Biocide Treatment — Dundalk
Areas we cover around Dundalk
- Blackrock
- Carlingford
- Omeath
- Ardee
- Castlebellingham
- Louth Village
- Knockbridge
- Haggardstown
- Muirhevnamor
- Bellurgan
Frequently asked
How much does biocide treatment cost in Dundalk?
From €90 for a typical domestic job, but the honest answer is that it depends on size, access and condition. We give you a fixed written price before any work starts, and there is no call-out fee for looking at it.
Do you actually travel to Dundalk?
Yes. Dundalk and the surrounding County Louth area — including Blackrock, Carlingford, Omeath, Ardee, Castlebellingham — are part of our regular round. Tell us your address and we will confirm availability straight away.
Is a roof biocide better than pressure washing in Dundalk?
Yes, and it is not close. Pressure washing strips the surface off concrete tiles and shortens their life. With the moss levels we see around Dundalk, hand removal plus a biocide is the only sensible approach.
How soon can you start?
Most quotes go out within 24 hours and we can usually schedule within the same week. Exterior work depends on the forecast, and we will move a date at no cost rather than rush a job in the rain.
Are you insured?
Yes. We carry public liability insurance and will send the certificate with your quote. Property managers and commercial clients can also request a method statement and risk assessment.
Full method, inclusions and price guide on the main biocide treatment page.
Get a fixed price for Dundalk
Send a photo and a rough size and we will come back with a written price — usually the same day.