Portland’s wet winters, moss growth, and year-round moisture make roof maintenance more important here than in most parts of the country. A little seasonal care not only protects your home — it can easily add 5–10 years to the lifespan of your roof. Use this Portland-specific checklist to keep your roof healthy all year, and grab the free printable version at the bottom of this page.
Fall roof maintenance checklist (September–November)
Portland’s rainy season starts quickly, so fall is one of the most critical times of year for roof care.
- Clean out all gutters and downspouts — heavy leaf fall leads to clogs, overflow, and roof rot.
- Remove roof debris — twigs, pine needles, and leaves trap moisture and feed moss.
- Inspect for moss growth — look for green patches, blackened shingles, and curled edges.
- Check flashing around chimneys and pipes — windy fall storms loosen flashing, a major cause of winter leaks.
- Inspect attic ventilation — good airflow prevents condensation during the cold months.
- Schedule a professional inspection before heavy winter rain arrives.
Winter roof maintenance checklist (December–February)
Portland winters are wet and heavy — steady rainfall, freezing nights, and occasional snow all stress your roof.
- Check ceilings and attic for signs of leaks (yellow stains, damp insulation, musty smells).
- Inspect gutters after major storms — needles and wind clog them even after fall cleanup.
- Watch for ice dams during cold snaps (blocked gutters plus freezing temps back water up under shingles).
- Remove heavy snow with a roof rake if we get a major storm — never climb an icy, wet roof.
- Inspect shingles from the ground after windstorms for lifted tabs or loose ridge caps.
Spring roof maintenance checklist (March–May)
Spring is the recovery season and the best time to assess winter damage.
- Reinspect shingles for damage or lifting — winter moisture reveals underlying issues.
- Treat moss that grew over winter; the PNW is a moss hotspot and spring is a safe time to treat it.
- Rinse gutters and flush downspouts of built-up winter debris.
- Inspect roof valleys and edges, where debris and moss collect most.
- Check for animal activity in soffits, vents, and eaves.
- Schedule a mid-year professional check, especially if your roof is 12+ years old or moss is returning.
Summer roof maintenance checklist (June–August)
Portland summers are mild, but UV exposure can speed up shingle wear.
- Inspect shingles for cracking or blistering — heat makes damage more visible.
- Trim overhanging branches that drop debris and shade the roof (encouraging moss).
- Wash away any remaining moss — summer is the safest, easiest time to treat it.
- Check roof ventilation; summer heat tests attic airflow, which is critical for energy efficiency.
- Look over sealant and flashing around vents and chimneys, which dry out faster in summer.
Year-round tips for Portland roofs
- Never pressure wash your roof — it destroys shingles.
- Keep trees trimmed to reduce debris and moss.
- Consider oversized gutters if your home sits under large fir or maple trees.
- If your roof is over 15 years old, schedule inspections twice a year.
- Treat moss early; it grows aggressively in our climate.
Need a seasonal roof inspection?
Jobin Roofing offers free roof inspections, expert moss treatment, gutter cleaning, and full replacements and repairs across Portland, Vancouver, and surrounding areas. Request your free estimate, call or text 503-523-3449, or email customercare@jobinroofing.com.
