What to Expect During a Roof Replacement: A Step-by-Step Timeline

For most homeowners, a roof replacement is unfamiliar territory — and not knowing what to expect makes a big project feel bigger. The good news: a well-run replacement is a predictable, organized process. Here’s exactly what happens when Orion Roofing replaces a roof on a Tualatin-area home, step by step, and roughly how long each stage takes.

Everything starts with an on-site inspection and a free estimate. We measure the roof, assess its condition and pitch, look for any underlying issues, and walk you through your material options — from architectural asphalt shingles to premium lines from GAF, Malarkey, CertainTeed, and others. This is where you choose your shingle and color and we lock in a clear scope and price. It's of prime importance that you choose a contractor you trust and are comfortable with. We have been family- owned and operated for over 33 years .

Once you approve the estimate, we schedule the work around the weather and. inspections, and that should be included in your quote. We order your materials and confirm a start date. Depending on the season and demand, there may be a short wait, which is why planning ahead pays off in Oregon.

On install day, the crew removes the old roofing down to the wood decking. This is also a critical inspection point: with the old shingles gone, we can see the decking clearly and check for rot, water damage, or soft spots. If we find compromised decking, we’ll show you and replace it before going further — covering it up would only guarantee future problems.

With a sound deck, the new roof goes on in layers: a water-resistant underlayment, ice-and-water shield in the vulnerable areas, new flashing around chimneys, vents, and valleys, then the shingles themselves, and finally ridge venting to keep the attic breathing. Proper ventilation and flashing are where a roof is won or lost in our climate, and they get close attention. For a typical home, the installation itself often takes 2-4 days.

A professional job ends as cleanly as it started. We haul away all debris, run magnetic sweeps across the yard and driveway to capture stray nails, and leave the property as we found it. Then we walk the finished roof with you, review the workmanship and material warranties, and make sure you’re satisfied before we call it done.

Rain is the one variable we can’t control. We schedule replacements during dry windows whenever possible and build in contingencies, because shingles need a dry deck to seal correctly. A reputable contractor will never rush a roof on in the rain just to hit a date — and at Orion, we’d rather pause a day than compromise your roof. With more than 30 years of experience and a #1 rating in Hillsboro, we’ve learned to work with our climate, not against it.