Portsmouth Has a Unique Roof Cleaning Problem
Most Hampshire roof cleaners use a standard inland biocide. Portsmouth doesn’t play by inland rules. Salt-laden air, year-round high humidity, and the prevailing south-westerlies off the Solent mean:
- Faster algae regrowth — standard biocides break down quicker in salt-saturated air, sometimes losing effectiveness in under 3 years
- Persistent lichen patches — tougher to remove than inland varieties, particularly on north-facing slate
- Marine-grade corrosion — older copper flashings and lead valleys degrade faster, exposing tiles to water ingress at the seams
We use a coastal-grade biocide formulation specifically for PO postcode properties — longer-lasting against salt exposure, more aggressive against marine algae varieties.
Portsmouth Postcodes We Cover
- PO1 — Old Portsmouth, Spinnaker Tower, Gunwharf Quays
- PO2 — North End, Stamshaw, Tipner
- PO3 — Copnor, Hilsea, Buckland
- PO4 — Southsea (seafront, Albert Road, Eastney)
- PO5 — Southsea (Castle Road, Palmerston Road area)
- PO6 — Cosham, Drayton, Wymering, Paulsgrove, Portchester
- PO7 — Waterlooville, Cowplain, Purbrook
- PO8 — Horndean, Clanfield, Lovedean
- PO9 — Havant, Bedhampton, Leigh Park
Typical Portsmouth Roof Cleaning Costs
Pricing for common Portsmouth property types:
- Southsea Victorian terraced (slate, 60–90 m²): £380–£620
- Cosham / Drayton semi-detached (concrete tiles, 90–120 m²): £480–£780
- Portchester / Drayton detached (130–180 m²): £700–£1,200
- Coastal-grade biocide upgrade: +£60–£120 (recommended for all PO1, PO4, PO5 properties within 1 km of the seafront)
See the full Hampshire pricing guide.
Common Portsmouth Roof Materials
The PO postcode area has a more varied roof stock than most Hampshire towns:
- Welsh slate — widespread on Victorian terraces (Southsea, Fratton, Buckland)
- Concrete interlocking — 1960s–90s estates (Paulsgrove, Cosham, Drayton)
- Clay pantile — some older Cosham & Portchester properties
- Synthetic slate — newer Tipner and Tipner West regeneration developments
Our soft wash system handles all four without modification. We don’t use jet washers.
Landlord & Letting Agent Services
Portsmouth has a heavy rental market, particularly across PO4, PO5 and PO1. We work with several Portsmouth letting agents on portfolio cleaning — volume discounts available from 5+ properties. Get in touch for a portfolio quote.
Nearby Areas
Southampton · Fareham · Winchester · Havant · Waterlooville