Celtic Services, Inc Powerwashing

Celtic Services, run on Cape Cod by owner Jack Walsh, has turned into the name locals reach for when a roof turns orange-green with Cape Cod moss and lichen — a recurring theme across dozens of reviews is a roof or shingles that "looks brand new" after Jack's team cleans it, often photographed for an insurance company demanding the moss come off within a set deadline. The review history runs unbroken from 2021 through the present — 49 reviews, every one of them five stars — and describes the same experience again and again: Jack personally returns calls and quotes within hours or a day, shows up when promised, and leaves the property, whether it's a house, roof, deck, fence, or outdoor furniture, cleaner than he found it. Several reviewers are repeat customers who've used Celtic multiple times over the years, and more than one mentions Jack's crew taking care around gardens, plantings, and conservation land while working. A handful of reviews describe insurance-driven jobs — moss removal ordered by a homeowner's insurer with a tight deadline — where Jack rearranged his schedule, including delaying an end-of-season shutdown, to get the work done in time. There's no complaint in the written record to flag. For roof, siding, deck, or gutter cleaning on Cape Cod, Celtic Services has one of the more consistent track records in the area — the main thing worth confirming up front is scheduling, since demand for insurance-deadline jobs can run tight in season.