Sherwood and Wilsonville roofing guide: why so many 1990s and 2000s roofs are wearing out, what to check, and how shared townhome roofs get replaced.
Sherwood went from about 3,000 residents in 1990 to nearly 12,000 by 2000, according to census figures. That's a lot of houses going up at the same time, and a lot of roofs that are now 25 to 35 years old. Wilsonville's newer neighborhoods tell a similar story on a slightly later timeline.
Sherwood's population nearly quadrupled during the 1990s, according to U.S. Census figures.
See Sherwood's census historyIf you own one of those homes, your roof has either been replaced once already or it's close to needing it. This guide walks through how to tell which, what to ask about a roof that's already been redone, and how shared roofs on townhomes and duplexes get handled. It's written for Sherwood and Wilsonville homeowners, but most of it applies anywhere in the south metro.
Why So Many Sherwood and Wilsonville Roofs Are Hitting the Same Age
When a neighborhood gets built all at once, the roofs go on all at once too. Same builder, same year, usually the same shingle. And most builders chose that shingle for price, not longevity.
In our experience, those original builder-grade roofs start to give out around the 20-year mark. That's why you'll see one house on a street get a new roof, and then three more over the next couple of years. They were all on the same clock.
In Sherwood, most of the 1990s boom homes are well past that point. In Wilsonville, planned communities like Villebois, which has been building out for close to two decades, are now reaching it with their earliest homes. Older Wilsonville neighborhoods like Charbonneau are generally on second or third roofs by now.
Villebois is one of Wilsonville's largest planned communities, built out in phases over many years.
Learn about VilleboisIf Your Roof Has Already Been Replaced Once
A lot of 1990s homes in Sherwood had their first replacement sometime in the 2010s. That's great, but it doesn't automatically mean you're in the clear. It's worth finding out a few things about that roof.
Who installed it, and do they still stand behind it? A workmanship warranty is only as good as the company behind it. If the contractor is gone, that coverage is gone too.
What warranty came with the shingles? Most shingles are sold with a "lifetime" warranty, but that usually becomes prorated after about ten years and only covers the material. Labor and disposal are on you.
We broke down what "lifetime" really means, and what's left on the bill, in our warranty guide.
Read what roof warranties actually coverWas the ventilation updated? This is the one that gets skipped most. The attic ventilation standard has roughly doubled in the last decade, from one square foot of vent per 300 square feet of attic to one per 150. A quick reroof done ten or fifteen years ago probably didn't touch it. Poor ventilation traps moisture in your attic, which raises your heating bill, invites mold, and cooks the shingles from underneath in summer. Sean O'Hare, who founded Evolution RoofWorks, estimates that proper ventilation adds 7 to 15 percent to a shingle's life.
Here's how the 1:150 ventilation rule works and what an under-ventilated attic does to your shingles.
Read our attic ventilation and roof lifespan guideYou can check a previous contractor's license history with the Oregon Construction Contractors Board.
Search the Oregon CCB license databaseSigns Your Sherwood or Wilsonville Roof Needs Replacing
Whether it's the original roof or the second one, these are the signs we look for. Most of them can be spotted from the ground.
- Shingles that look shiny when the sun hits them at an angle, which means the fiberglass mat underneath is showing through
- Piles of granules in the gutters or at the base of downspouts
- Shingle tabs lifting or flapping in the wind
- Moss spreading on the north-facing side
- Any water stain on a ceiling, even a small one
If you're seeing more than one of these, a roof inspection will tell you how much life is left. A good inspection includes getting on the roof and going into the attic. We do both every time.
Every inspection we do includes getting on the roof and into the attic, not just a drone flyover.
Learn about our roof inspectionsMoss caught early doesn't always mean a new roof. A cleaning and zinc treatment can buy a lot more years.
See our roof maintenance servicesShared Roofs: Townhomes, Duplexes, and HOAs
Plenty of homes in both cities share a roof with a neighbor. That makes townhome roof replacement trickier, especially when one owner is ready and the other isn't.
We ran into exactly that with a homeowner who lived in a duplex. Her neighbor refused to replace their half, and the roof wasn't a simple gable you could split down the middle. So we found the smallest point where the two roof sections met, replaced hers right up to that line, and wove the new roof into the old one so it would stay watertight. Sean calls it one of his favorite jobs, because she'd assumed she was stuck.
If you're in a similar spot, a few things help:
- Talk to your neighbor early. Replacing a shared roof at the same time is almost always cheaper and cleaner.
- Check your HOA rules. Many planned communities have rules about shingle color and style, and some require approval before work starts.
- Ask how the transition will be handled. Where the new roof meets the old one is the most likely place for a future leak, so it needs a real plan.
What to Expect When You Call Us
We'll come out, get on the roof, and check the attic. Then we'll sit down with you the same day and go through what we found. If a repair makes sense, we'll say so. If the whole roof is going to need replacing within a couple of years, we'll tell you that too, because patching a roof that's about to fail isn't a good use of your money.
We explain how we make the repair-or-replace call, including roof age, damage spread, and cost.
Read our repair vs. replacement guideIf replacement is the answer, you'll get four options to choose from, with everything each one includes spelled out. There's no pressure to sign that day, and we won't flood you with follow-up calls.
Tear-off, decking, ventilation, and cleanup: here's what our replacement process looks like, start to finish.
Explore our roof replacement processGetting more than one bid? Here's how to line roofing quotes up side by side so you're comparing the same work.
Read our guide to comparing roofing quotesFrequently Asked Questions
Do you work in Sherwood and Wilsonville?
Yes. We're based in Tigard, and both cities are a short drive for us. You can see our full service area on our areas we serve page.
How long does a builder-grade roof last in Oregon?
In our experience, about 20 years before problems start showing up. Shade, moss, and how well the attic is ventilated can push that up or down.
Can I replace my half of a shared townhome roof?
Often, yes, depending on how the roof is built. It takes careful planning where the new and old sections meet. It's always better if both owners can replace together.
Do I need HOA approval to replace my roof?
In many Sherwood and Wilsonville neighborhoods, yes. Check your HOA's architectural guidelines for rules on shingle color and style before you pick a product.
My roof was replaced ten years ago. Should I still get it inspected?
Yes, especially before the rainy season. Ten years is also about when many standard shingle warranties become prorated, so it's a good time to know where you stand.
Roof inspections, repairs, and replacements for Sherwood homes, from a crew based right next door.
See our Sherwood roofing servicesShared townhome roofs, HOA guidelines, and honest repair-or-replace advice for Wilsonville homeowners.
See our Wilsonville roofing servicesWe're based in Tigard, right next door to Sherwood, and the same crew handles every job.
See our Tigard roofing servicesTualatin sits right between Sherwood and Wilsonville, and we work there every week.
See our Tualatin roofing servicesSherwood, Wilsonville, and the rest of the south and west Portland metro: here's everywhere we work.
See every area we serveThe Bottom Line
Sherwood and Wilsonville have a lot of homes whose roofs were built on the same schedule, and many of them are at or past the age where problems show up. If yours is original, get it looked at. If it's been replaced once, find out what was actually done, especially in the attic.
When you want an honest assessment, schedule a free roof inspection in Sherwood, or call us at (971) 500-6941.
Schedule a free roof inspection in SherwoodIn Wilsonville? We'll come out, get on the roof, check the attic, and walk you through what we found the same day.
Schedule a free roof inspection in WilsonvilleRelated Service
Need help with roof replacement?

Sean O'Hare
Founder & CEO, Evolution RoofWorks
Evolution RoofWorks is a licensed, education-first roofing contractor (CCB # 251336) serving the Portland metro area.



