
Exposed to wind and sea spray, roofs on Portland face a tougher environment than many inland Dorset towns, which can speed up the build-up of algae and grime. A roof cleaner can restore tiles and slate with a proper roof softwash suited to coastal conditions.
Roof cleaners taking on jobs around Portland also often work in Broadstone, Dorchester, Poole and Wimborne Minster, giving a broader pool of tradespeople to compare.
Costs depend on roof size, pitch and how exposed the property is, along with whether a manual scrape and treatment or full steam clean is needed. Post your job on Bark to get a handful of quotes to weigh up.
Bark's data suggests roof cleaning on Portland costs £400 to £1,000 per job, roughly £8.50 to £14 per square metre. The total depends on roof size, access, and whether it is a manual scrape and biocide treatment or a full steam clean.