Tony's Roofing urges Puget Sound homeowners to remove moss before fall rains

Tony's Roofing is telling Pierce and King County homeowners to treat moss and clean roofs during the last dry weeks of summer, before fall rain makes the work riskier and less effective. The company says the wrong cleaning method, especially high pressure on asphalt shingles, can damage roofs faster than moss can.

Why it matters: - Moss is more than a cosmetic issue on Puget Sound roofs. It can lift shingle edges, create water paths and push moisture into the underlayment. - Homeowners have a short seasonal window to act. Once sustained fall rain returns, moss reactivates, roof surfaces get slick and safe treatment becomes harder until next summer. - The wrong cleaning method can shorten roof life. High-pressure washing can remove protective granules and trigger premature shingle failure.

What happened: - Tony's Roofing is urging homeowners across Pierce and King County to schedule roof cleaning and moss treatment during the remaining dry weeks of summer. - The company is telling homeowners to ask one key question before hiring a contractor: what pressure will be used? - Tony's Roofing says late summer is the safest time to treat moss because the growth is dormant and dry, and the roof can be walked with less risk.

The details: - Moss grows most aggressively on north-facing slopes, under tree canopy and in places where debris collects and holds water. - GAF, North America's largest roofing manufacturer, says asphalt shingles should be cleaned with a low-pressure application of a specific solution and should not be power washed. - GAF also recommends professional moss removal and low-pressure rinsing at a downward angle to avoid lifting or warping shingles. - Granules protect asphalt shingles from ultraviolet light and support fire and weather performance. - Widespread granule loss cannot be reversed by later cleaning. - Tony's Roofing says high-pressure washing is a common cause of manufacturer warranty disputes. - Cedar roofing follows different rules than asphalt roofing, so cleaning methods should match the roof material. - Tony's Roofing says it works extensively with cedar roofing across the region.

Between the lines: - The company is framing roof cleaning as a timing problem as much as a maintenance problem. - A visually aggressive cleaning method may seem faster, but the article argues it can create more expensive damage than the moss itself. - Treatment alone does not solve the underlying moisture conditions that let moss return. - Zinc or copper strips can help inhibit regrowth during rainfall, but they are a follow-up to treatment, not a replacement. - Branch trimming and gutter cleaning also reduce shade, debris and pooling water that feed moss growth.

What's next: - Tony's Roofing says homeowners should combine moss treatment with a roof inspection before the wet season. - A crew already on the roof can identify lifted shingles, failed flashing and granule loss before storms expose those problems. - The company also offers roof inspections for real estate transactions, storm and wind damage repair and insurance claim work.

The bottom line: - In Western Washington, the dry-season window for safe moss removal is closing fast, and the cheapest-looking cleaning method can be the most expensive one over time.