Your roof takes a beating in the Pacific Northwest. Between constant rain, moss growth, and damp conditions, PNW roofs age differently than those in drier climates. If your roof is showing these five signs, it's time to consider replacement.
Most asphalt shingle roofs last 15–20 years in our region (compared to 20–25 years elsewhere). If your roof is past that age or showing multiple signs below, a new roof will save you from costly leaks and water damage.
The 5 Signs Your Roof Needs Replacement
Sign #1: Curling, Cracked, or Missing Shingles
What to Look For:
Shingles that curl at the edges, crack, or have missing sections. You might spot bare spots where shingles have blown off, or notice shingle pieces in your gutters after wind or heavy rain.
Why it matters: Curling or missing shingles expose the plywood underneath to water. Once water gets under the shingles, it spreads quickly and causes rot that's expensive to repair.
Repair or replace? A few missing shingles can be patched ($1,000–$2,000). But if you see curling or cracks across multiple areas, your roof is nearing the end of life and replacement is the safer choice.
Sign #2: Heavy Moss or Algae Growth
What to Look For:
Green moss or dark streaks covering large portions of your roof. In our wet climate, this is common—but excessive growth is a red flag.
Why it matters: Moss traps moisture against the shingles, accelerating deterioration. The weight of heavy moss can also damage gutters and weaken roof structure. It shortens your roof's lifespan by years.
Repair or replace? Light moss can be professionally removed ($300–$600). But if your roof is already 15+ years old with heavy moss, replacement is the better long-term investment. The moss will just come back faster as your roof ages.
Sign #3: Sagging or Soft Spots in the Roof
What to Look For:
From the ground or attic, look for dips or sags along the roofline. The roof should be straight—if it looks wavy or has soft areas when you walk on it, that's serious.
Why it matters: Sagging means water has rotted the plywood or decking beneath the shingles. This is structural damage. Continued water exposure can compromise the entire roof and the walls below.
Repair or replace? Sagging always requires a full roof replacement. This is not a patch situation. You need a licensed roofer to inspect immediately.
Sign #4: Daylight Visible Through Your Attic
What to Look For:
Go into your attic on a clear day. Can you see light coming through cracks or gaps in the roof? Water stains or wet insulation? These are unmistakable signs.
Why it matters: Daylight means holes. Water is absolutely getting into your attic. Wet insulation loses its thermal value, and wood rot spreads quickly, making this a health and structural hazard.
Repair or replace? Any visible holes require immediate roof replacement. Don't wait—water damage compounds exponentially.
Sign #5: Your Roof is 20+ Years Old
What to Look For:
Check your home's records or ask a roofer to estimate age by inspecting shingle granule loss and deterioration. If your roof was installed before 2004, it's past or approaching the end of life.
Why it matters: Asphalt shingles have a set lifespan. Even if your roof looks "okay," it's living on borrowed time. Sudden failures—leaks, wind damage, moss acceleration—become more likely every year past 20.
Repair or replace? At 20+ years, replacement is the sensible choice. Repairs to aging roofs are throwing money at a ticking clock. A new roof gives you 15–20 years of peace of mind.
What's the Next Step If You See These Signs?
Get a Professional Roof Inspection
Don't climb on your roof yourself—it's dangerous. A licensed roofer will walk your entire roof, check for damage, estimate remaining life, and give you honest options: repair vs. replace.
Understand Repair vs. Replace
Roof Repair: $1,000–$2,000 for patching single leaks, replacing a few shingles, or clearing moss. Best for recent, isolated damage on younger roofs.
Roof Replacement: $8,000–$15,000+ for a full new roof. The long-term cost-effective option if your roof is aging or showing multiple signs above.
PNW-Specific Roof Maintenance Tips
Moisture is your roof's enemy. Keep gutters clean, ensure proper attic ventilation, and trim tree branches overhanging your roof. Reduce moss growth with proper ventilation and consider zinc or copper strips.
Keep Gutters Clean
Clogged gutters trap water on your roof. In the PNW, this leads to accelerated moss growth and rot. Clean gutters 2–3 times per year.
Ensure Attic Ventilation
Proper airflow prevents moisture buildup in your attic. Check that soffit and ridge vents aren't blocked. Good ventilation extends roof life significantly.
Trim Overhanging Branches
Branches that touch your roof keep it damp and accelerate moss growth. Plus, falling branches damage shingles. Clear them back.
Consider Professional Moss Removal
Every 3–5 years, professional moss removal ($300–$600) helps. For older roofs showing heavy growth, factor replacement into your plans.
How Much Does a New Roof Cost in Portland or Vancouver?
A typical residential roof replacement costs:
- Asphalt shingles: $8,000–$15,000+ (most common, 15–20 year lifespan in PNW)
- Metal roofing: $20,000–$50,000 (40+ year lifespan, better in wet climate)
Price depends on roof size, pitch, material, and local labor costs. We offer free roof inspections and transparent quotes with no surprises.
Ready to Get Your Roof Inspected?
If you've spotted any of these five signs, don't wait. Water damage gets exponentially more expensive the longer you ignore it. Schedule a free roof inspection with WifPros. We'll walk your entire roof, give you an honest assessment, and outline your options.
Learn more about our roofing services, or call us today to schedule your inspection.