Moss & algae removal in Shipley
Green film, spongy moss, slippery patches after rain.
The give-away sign in Shipley is a spongy strip along the north-facing wall of a canal-side conversion — that's an algal mat feeding the moss above it.
We work Shipley and the surrounding BD18 postcodes every week, so this isn't a job we're travelling to — it's on the round.
How we fix it
biocide pre-treatment 24–48 hours before wash to kill spores at root
controlled soft-wash lift to remove the moss mat without blowing joints
targeted rotary pass on hard-standing sections only
rinse-through and joint refill with kiln-dried sand where paving is block
optional residual biocide to slow regrowth through winter
What we use, and why
Sodium hypochlorite biocide at low concentration, followed by a neutral rinse — never neat bleach onto stone.
The tell-tale signs
- green or black film across shaded flags
- slippery footing near north-facing walls
- spongy moss pads growing between joints
- dark tramlines where downpipes discharge
Keeping it fixed
Cut back overhanging growth, keep gutters clear so downpipes don't discharge across paving, and re-treat lightly every 12–18 months.
When to book
Best tackled April–October when surfaces can dry fully within 24 hours of treatment; a dry window either side of the visit doubles the kill rate.
Left through a wet winter, moss mats thicken and lift the jointing — the same job costs materially more once sand needs full extraction.
Causes in BD18
- 1shaded aspect and poor airflow
- 2surface sealer worn off and no longer shedding water
- 3overhanging trees dropping organic debris
Shipley FAQs
- My paving is under trees near Shipley town centre and Salts Mill retail — is it worth doing?
- Yes, but plan for a lighter maintenance visit every 12 months; shaded Shipley plots regrow faster than open drives.
- Can you re-sand block joints on the same visit?
- Yes — where we've lifted moss from block paving in Shipley, we refill with kiln-dried sand before we leave so the surface locks up again.
- Do you cover Shipley through the winter?
- Yes — we still work BD18 in winter, but we plan around a dry 24–48h window so the treatment isn't washed off before it activates.
- Is the biocide safe around pets and plants in BD18?
- We dilute to a low working strength and keep runoff off borders — pets can return to the surface once it's dry, usually 2–3 hours.
- How long before the moss comes back on Shipley paving?
- With the biocide route and a residual pass, most Shipley customers get 12–18 months before any visible regrowth, longer in sunnier plots.
Related in Shipley
Moss on Shipley paving isn't a scrubbing job — it's a chemistry job first and a wash job second. That's the order we work in, and it's why the results hold.
Send a photo from your BD18 address and we'll come back with a treatment plan, timings and a firm price the same working day.
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