Roof replacement · Downey & LA County
Roof replacement, done once and done right.
When repairs stop making sense, we rebuild from the deck up — full tear-off, honest deck work, and a manufacturer-spec install with the warranty to match.
Most homes rebuilt in 1–3 days
Permits & city inspections handled for you
Manufacturer + workmanship warranty, in writing
What's included
A One Way replacement, line by line.
Full tear-off & haul-away
Down to the deck, with same-day debris removal and a magnetic nail sweep of your yard and driveway.
Deck inspection & repair
Rotten or delaminated sheathing is replaced before anything new goes on top — documented with photos.
Underlayment & waterproofing
Synthetic underlayment across the field, with upgraded protection at valleys, eaves, and penetrations.
New flashing & drip edge
Fresh metal at chimneys, walls, and valleys. We don't reuse old flashing because "it still fits."
Balanced ventilation
Ridge and intake venting matched to your attic, so heat escapes and shingles reach their rated life.
Permits & final inspection
City paperwork pulled and inspections scheduled — in Downey or whichever city you call home.
An honest read
Replacement is the right call less often than roofers say it is.
If a repair will genuinely solve your problem, that's what we'll quote — see our roof repair services in LA County. Replacement earns our recommendation only when patching would just delay the inevitable. Not sure where your roof stands? Start with a free roof inspection in Downey or read our guide on the 7 signs it's time to replace.
REPLACEMENT MAKES SENSE WHEN:
Shingles are past their service life — usually 20–25 years for asphalt
Granule loss and brittleness are widespread, not local
Leaks keep appearing in new places after each repair
Storm damage spans multiple roof planes
The deck sags or feels spongy underfoot
Systems
Choose the system that fits the house.
Architectural shingle
The workhorse for SoCal homes — dimensional profiles, Title 24 cool-roof colors, strong wind ratings.
Shingle roofing systems →Clay & concrete tile
Decades of life and classic California looks — including lift & relay that reuses your existing tile.
Tile roofing & relay →Flat & low-slope
TPO single-ply and torch-down systems for flat sections, additions, and commercial buildings.
Commercial & flat roofing →Roof replacement questions, answered.
Most single-family shingle roofs are torn off and rebuilt in one to three days. Tile and flat systems take longer. Your written scope includes the exact timeline, and we don't start until your materials are on site.
Yes. Expect noise from roughly 7am to 5pm — plan around naps, pets, and work-from-home calls. We walk the property protection plan with you before day one.
It gets flagged immediately with photos, and replacement is approved by you before we proceed. Deck repair terms are spelled out in the scope up front — never a surprise at the end.
Two warranties: the manufacturer's material warranty and One Way's written workmanship warranty. Both are registered before the final walkthrough and you receive copies of each.