Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Replacement Across Union City
A full roof replacement in Union City typically runs between $12,500 and $28,000 for an average single-family tract home, with architectural asphalt shingles being the most common material choice. The exact figure depends on square footage, roof pitch, decking condition, and whether your home sits in the flatland neighborhoods or up toward the hills along Mission Boulevard. We schedule free estimates across Union City within a few days, and our crews know the housing stock here well enough to spot the usual trouble before we step on the ladder. Call (945) 303-9821 and you’ll get a live person, not a voicemail.
Why Tilehurst Roofing Is Union City’s Preferred Roof Replacement Company
Tilehurst Roofing operates as a local member of the Kingswell family of roofing companies, founded in 2000 and built on one promise that matters to Union City homeowners: the written price in your hands before any work starts. Our Roof Replacement team has walked hundreds of roofs in the Decoto, Alvarado, and Mission Gateway neighborhoods, and our customers consistently tell us the same thing: we showed up in the window we said we would, and the number on the proposal matched the number on the final invoice. Greg Holloway, who leads our crews, reviews every Union City job personally before we schedule a tear-off.
Homeowners here have dealt with contractors who ghosted them, or changed the price at the door, or finished a repair that leaked again before the next rain. We operate differently, and it’s not complicated. A live person answers our phone 24 hours a day, 7 days a week, including evenings and weekends. Every repair carries a written guarantee delivered before the crew leaves your property. And our 365-Day Done Right Promise covers every replacement for a full year after completion: if it’s not done right, we make it right at no charge. That’s the Kingswell Way, and it’s the standard for every roof we install in Union City.
Flat Roof Replacement in Union City
Flat Roof Replacement in Union City addresses an older segment of local housing that most roofers overlook: the low-slope built-up sections and modified-bitumen covers you’ll find over patios, carports, and midcentury additions throughout the Alvarado neighborhood and along the older corridors near Decoto Road. Union City homes built between 1960 and 1985 often carry flat or near-flat roof sections over rear additions and attached garages, and because this city’s bay-edge moisture keeps these surfaces damp longer than inland roofs, the asphalt layers and seams degrade from standing water and persistent condensation rather than sun exposure.
Torch-Down and Modified Bitumen Systems
For most low-slope roofs in Union City, we install two- or three-layer torch-down modified bitumen systems from GAF or CertainTeed. These are sealed at the seams with heat, which creates the waterproof membrane that a flat roof needs. Prices for a typical one-car-garage flat roof replacement here run $7,500-$11,500, including tear-off of the old built-up layers and disposal.
Roof Decking Repair Under Flat Sections
Flat roofs on older Union City homes tend to hide soft decking, especially around the perimeter edges where moisture collects before it drains toward scuppers or downspouts. We include decking replacement in our written quote if we find spongy spots during inspection, and we’ll show you exactly which sheets we’re replacing and why. You pay the quoted price, not a surprise change order.
Roof Installation in Union City
Roof Installation in Union City means tearing off an aging original or first-generation composition roof and building a complete new system from the decking up, and on most tract homes in the city that’s a straightforward architectural shingle job. The homes we’re seeing from the 1960s through the early 1980s, the ones that dominate neighborhoods west of Mission Boulevard and throughout the Decoto area, were built with low-slope gable roofs designed for basic three-tab shingles with limited underlayment. That original material is now 40 to 60 years old, which means the underlayment has often failed even where the shingles still look passable from the curb.
Architectural Shingle Installations
Our standard roof installation for Union City homes uses architectural shingles from GAF, Owens Corning, or IKO, installed with new synthetic underlayment, ice and water shield in valleys and around penetrations, new drip edge, and new ridge cap. A typical 1,800-2,200-square-foot single-story ranch here runs $14,000-$21,000 for a full tear-off and installation.
New Construction Rough-In
For new construction and major additions in Union City, we coordinate with your general contractor to sequence the roof installation so interior work can continue once we’re dry-in. We pull the roof portion of the permit, rough in penetrations for vents and flues, and return for final inspection once the structure is complete. Planning a second-story addition or detached ADU? We’ll give you a written roof price before the framing goes up so your budget’s settled early.
Trusted Brands We Service in Union City
We install and service roofing systems from GAF, CertainTeed, and Owens Corning, and we stock the architectural shingle lines that match the dominant housing styles in Union City. That means faster turnaround when a storm or a failed repair calls for a quick response, and it means you’re not stuck choosing from whatever happened to be left on the truck. You get a real choice between manufacturers, colors, and profiles, and we’ll walk you through the trade-offs like lifetime warranty terms, granule composition, and algae resistance. For bay-front and low-lying Union City lots where moss and algae are a persistent problem, we often recommend algae-resistant shingle lines because they hold their appearance longer in this marine climate.
Common Roof Replacement Problems We See in Union City Homes
- Algae streaking and moss on north- and east-facing planes. Salt-laden marine air from the South Bay keeps Union City’s relative humidity elevated year-round, and the shaded planes collect the moisture that feeds black algae and moss. The south side of the same roof can look nearly new while the north side is streaked, stained, and losing granules.
- Original 1960-1985 tract shingles failing all at once. The post-incorporation building boom in Union City put up thousands of ranch and split-level homes with original composition shingles now 40 to 60 years old. Whole blocks in Decoto and Alvarado are due for replacement within a few years of each other, which means decking and flashing problems repeat from house to house.
- Soft decking and rotted fascia hidden under aged shingles. Because Union City’s moisture infiltrates from the bay rather than through thermal cracking, underlayment rot and valley leaks often show up long before the shingle surface looks visibly worn. When we tear off, we’re rarely surprised to find plywood that needs replacement.
- Failing flashing at penetrations. The original flashing around chimneys, vent pipes, and skylights on these older tract homes was often thin metal with a short service life. By the time the shingles are ready for replacement, the flashing at those same penetrations has usually failed, and that’s where the water gets in first.
Pricing for Roof Replacement in Union City, CA
A full tear-off and architectural shingle replacement on a standard Union City ranch or two-story tract home runs $12,500-$22,000, while larger homes, steeper pitches from the hillside lots, and severe decking repairs push the top end toward $28,000. Flat roof replacement over a garage or patio addition runs $7,500-$11,500. The biggest variables in Union City are decking condition, whether original 1970s-era flashing needs replacement, and whether you’re keeping the same lightweight shingle profile or considering heavier tile, which triggers a structural dead-load check given the Hayward Fault zone along the eastern edge of the city. Your written quote lists every square, every penetration, and every sheet of decking so you can compare bids line by line. Call (945) 303-9821 to schedule your free estimate.
We Also Serve Cities Near Union City
Our Roof Replacement in Union City crews regularly work in the surrounding communities, including Fremont, Newark, San Lorenzo, and Castro Valley. If you own a home in one of these cities, you’ll get the same written-price guarantee and the same live-person phone support we provide to our Union City customers.
Serving Union City, CA - Our Local Coverage Area
We’re based in the Union City area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roof Replacement in Union City
Yes, and this is a bigger conversation in Union City than in most Bay Area cities because the Hayward Fault trace runs along the base of the hills directly east of town. Concrete and clay tile can add two to three times the dead load of architectural asphalt shingles, and on older tract homes that were engineered for lightweight composition roofs, that extra weight can exceed what the original framing was designed to carry. We’ll review your roof structure and, where needed, coordinate with a structural engineer before we quote the heavier material. Call (945) 303-9821 and we’ll walk you through it.
Start by checking whether each bid lists the same scope, same material specs, and same tear-off assumptions, because the lowest Union City quote often skips decking replacement, new flashing, or drip edge, and then charges for them as change orders once the old roof is open. Our written proposals list every square of shingles, every sheet of decking, every penetration, and the exact underlayment and flashing spec so you can compare square-for-square against any other contractor. If a competitor’s price is lower because they’re leaving something out, you’ll see it in the line items.
North- and east-facing planes on low-slope gable roofs are the highest-risk surfaces in Union City because salt-laden marine air from the South Bay pushes persistently inland and keeps those shaded planes damp year-round. This drives granule loss, algae colonization, and moss growth even without heavy rainfall, and it’s the reason we see underlayment rot and valley leaks on homes where the south-facing shingles still look perfectly fine. Flat and low-slope roof sections over patios and carports are the second-highest risk, especially where drainage collects before it reaches the scuppers.
A properly installed architectural shingle roof in Union City should last 25 to 35 years from manufacturers like GAF, CertainTeed, or Owens Corning, though the shaded north and east planes will show cosmetic algae streaking well before the shingles structurally fail. The moisture-driven failure mode here is slower than heat-cracking failures in inland cities like the Tri-Valley, which means you get more years out of a roof, but you do need to watch for moss and underlayment rot on the damp planes. Every roof we install is covered by our 365-Day Done Right Promise, and repair work carries its own written guarantee.
On most original 1960-1985 tract roofs in Union City, some decking replacement is likely, especially along valleys, around penetrations, and near the eaves where bay moisture has been working on plywood for decades. The original flashing around chimneys, vents, and skylights on these homes is usually at the end of its service life by the time the shingles need replacement, so we quote new flashing as standard on full tear-offs. We’ll confirm what’s needed once the old roof is open, and the written quote you received before work started is what you’ll see on the invoice.
Ready to get a straight answer on your Union City roof replacement? Call (945) 303-9821 to schedule your free written estimate. Greg and our Tilehurst Roofing team will inspect the roof, give you a price in writing before any work starts, and stand behind the job for a full year under the 365-Day Done Right Promise.
Written by Greg Holloway, Owner at Tilehurst Roofing, serving Union City homeowners with written-price, guaranteed roof replacement work.