Metal Roof Over Shingles (Retrofit) in Kennewick, WA

Metal Roof Over Shingles (Retrofit) in Kennewick: A Second Roof That Makes Sense

Kennewick sits in the Columbia Basin where the Columbia, Snake and Yakima rivers meet, on dry sandy silt and basalt ridges that bake under 100 degree summer heat. Most of the housing stock here tells the story: 1940s to 1960s single-story ranches and cottages with low-pitched shingle roofs in Downtown Kennewick and the Highlands, 1970s to 1990s split-levels around Vista Field and Canyon Lakes, and newer two-story stucco-and-stone homes in Southridge and Finley. That older low-slope shingle roof has taken decades of sun, spring wind and freezing fog.

Metal Roof Over Shingles (Retrofit) in Kennewick means we install a new metal roof directly over your existing asphalt shingles. No tear-off, less landfill waste, and a lower-cost path to a roof that sheds heat and wind instead of absorbing them. We check the deck first and tell you straight when tear-off is the better call. If you want the full picture on panel options, start with our metal roof installation page.

Why a Retrofit Roof Fits Kennewick's Ranch Homes and Hot Summers

The dominant failure mode in Kennewick is not rot from rain. It is sun-baked shingles that dry out, curl at the edges and lose their granules after 15 to 20 years of 100 degree afternoons. Add spring and fall wind that lifts edges and drives dust under tabs, plus embers from range fires in the sagebrush hills, and an aging shingle roof becomes a liability. A retrofit metal roof adds a radiant barrier of air space and a surface that reflects heat instead of storing it.

• You keep the existing shingles in place, so there is no tear-off dumpster and no landfill fee on your invoice.
• The metal panels shed heat, which takes load off your attic and your AC during July and August.
• Wind uplift resistance improves because panels fasten through the old roof into the deck and framing.
• Embers from dry-hill range fires land on steel instead of curling asphalt tabs.
• You can often re-roof in one to two days on a standard ranch, which matters when a storm is coming.

Before we quote a retrofit, we verify how many shingle layers are already on the roof, because code limits how many layers you can carry.

Key info: A 1950s ranch in the Highlands with one layer of original shingles is a strong retrofit candidate. A Canyon Lakes split-level that already has two layers plus a soft spot near the chimney is not, and we will tell you so before you sign anything.

Roofing permits are commonly required for a re-roof in Kennewick, and layer limits and inspection requirements vary by jurisdiction, so we verify the rules with the local building department before we order panels. You can review Washington State contractor requirements through the Washington State Department of Labor & Industries.

How We Install a Metal Roof Over Shingles in Kennewick, Step by Step

We do not sell a retrofit blind. The first hour on your roof decides whether the job is a good fit, and we walk the deck, the flashing and the attic before we commit to a number. Here is the sequence we run on a typical Kennewick ranch or split-level.

1. We inspect the existing shingles, deck and attic from the inside to find soft spots and old leaks.
2. We confirm the existing layer count and check it against the current code limit for your jurisdiction.
3. We install a horizontal sub-purlin or battens system over the shingles to create a flat, vented plane.
4. We run underlayment and ice-and-water shield at the eaves, valleys and penetrations.
5. We set new flashing at the chimney, skylights and sidewalls, then fasten the panels or shingles.
6. We finish the ridge, the gable trim and the gutters, then walk the roof with you before we leave.

The result is a roof plane that sits true even when the old shingles underneath are wavy, which is common on 1970s homes around Vista Field.

Key info: On a Southridge two-story with a low-slope rear section, we framed a vented batten grid over the old architectural shingles and installed standing seam panels. The homeowner kept the original roof in place and gained a cooler attic. See how that compares on our standing seam metal roof page.

Retrofit Methods We Use on Kennewick Roofs

Not every retrofit is the same. The right method depends on your roof pitch, your existing layer count and the look you want from the street. This table shows the paths we install most often in the Tri-Cities.

We match the method to the house, not the other way around, and we put the choice in writing before the crew shows up.

Metal Roof Over Shingles (Retrofit) Cost in Kennewick: What to Expect

Retrofit pricing in Kennewick starts around From $7/sq ft for a basic exposed-fastener panel system over a sound single-layer shingle roof. That figure is a starting point, not a flat rate. A one-story ranch in Downtown Kennewick with easy ladder access sits near the low end, while a steep two-story in Finley or a roof with complex valleys, dormers and skylights pushes toward the higher end. Panel profile, color, trim package and flashing work all move the number.

We also factor in the deck condition, the existing layer count and whether the chimney or skylights need new flashing. Getting two or three written estimates is smart, and you should compare what each one includes: battens, underlayment, flashing, ridge vent and cleanup. A cheap quote that skips the batten grid is not the same job. Our full pricing overview breaks down the line items.

Metal Roof Over Shingles (Retrofit) Near Me: What to Look for in a Kennewick Contractor

You will see plenty of trucks with ladders around the Tri-Cities after a wind event. The contractor worth hiring is the one who climbs up, checks the deck and puts the scope in writing. Use this list before you sign.

• Get two or three written estimates that itemize battens, underlayment, flashing and disposal.
• Ask for local references on retrofit jobs, not just new construction, and call them.
• Check whether your HOA or historic district restricts panel profile or color before you order.
• Confirm who pulls the roofing permit and who handles the inspection.

If a contractor will not put the layer count and the flashing scope in writing, keep looking. You can reach us through our contact page to schedule an inspection.

Metal Roof Over Shingles (Retrofit) in Kennewick: Pricing Guide

Indicative pricing, the exact cost depends on square footage, finish, and site access. Free personalized estimate within 24h at (509) 591-0547.