Roofing in Fremont, CA

Fremont was formed in 1956 when five separate townships, Centerville, Niles, Irvington, Mission San Jose and Warm Springs, joined as one city, and the old town names still describe where people live. Ardenwood, in the northwest corner near the Dumbarton Bridge approach, filled in later. Each district roofs a little differently.

Centerville, ZIP 94536, is the home district and the densest concentration of the 1950s and 1960s subdivisions that make up most of our repair calls. Niles keeps the oldest housing in the city, with Victorian and early 1900s homes on the grid below the Niles Canyon mouth, plus the storefronts that once served the Essanay film studio where Charlie Chaplin shot pictures in 1915. Irvington, in 94538, is block after block of classic ranch houses with attached garages. Mission San Jose, ZIP 94539, climbs the foothills under Mission Peak, and its homes range from 1960s ranches to large custom houses on steep lots. Warm Springs, at the south end near the Tesla factory, has housing from the 1960s through the 2010s and the newest tracts in the city around the BART station that opened in 2017. Ardenwood, in 94555, is a mix of single-family homes, condos and townhomes on flat ground near the bay.

The typical Fremont house is a single-story ranch built between the mid 1950s and the mid 1970s, in a tract like Glenmoor Gardens in Centerville or the streets around Irvington High. Most of these were built with wood shake roofs, and most have since been converted to composition shingle, sometimes over a second layer that should have been torn off. The pitch is low, the eaves are wide, and there are usually two or three plumbing vents, a furnace flue, and a kitchen fan penetrating the roof deck.

That original conversion from shake to shingle is now old enough that a lot of Fremont homeowners are looking at their second or third roof. On a Centerville or Irvington roof replacement we tear off to the deck, replace any plywood or skip sheathing that has rotted under a slow leak, run new underlayment, and install the shingle with proper starter, ridge and valley details. If the house still carries its original attic ventilation, which is usually a few gable vents and nothing else, we correct that at the same time through our ventilation and insulation work, because a hot, unventilated attic in a 1960s ranch shortens the life of any shingle you put on it.

The foothill homes in Mission San Jose are a different job. Lots are steeper, roofs are larger and more cut up, and a fair number carry concrete or clay tile rather than shingle. Tile lasts, but the underlayment beneath it does not, and the painted pipe flashings on a tile roof fail first of all. We repair and re-lay tile, replace failed underlayment, and inspect these roofs for buyers and sellers, which matters in 94539 where the homes are expensive and the roof inspection is one of the first things a buyer's agent asks about.

Warm Springs, at the other end of the price and age range, has thousands of newer homes built in the last decade around the BART station and the old Warm Springs industrial land. These roofs are young, but they are also the roofs most likely to have been finished with painted flashings that start to fade within the first year or two. A stone-coated replacement flashing, matched to the shingle color, is a small job that makes a new house look finished and closes off the most common leak point before it becomes one.

Fremont sits in California Energy Code climate zone 3, the cool coastal band, which means the prescriptive cool-roof requirement that applies to steep-slope re-roofs in the hot inland zones does not apply here. Summers are mild, with July highs averaging in the low 80s, and annual rainfall runs about 15 inches, nearly all of it between November and March. The last several winters have brought atmospheric-river storms that dump that rain in a few days rather than a few months, and that is when a marginal roof reveals itself.

The city also has its own terrain. Mission Peak, at 2,517 feet, catches weather that the flats do not, and the homes on its lower slopes get more wind, more rain and more debris than a house in Ardenwood. Central Park's Lake Elizabeth, an 83-acre lake in the middle of the city, sits in a low, flat basin where fog settles on winter mornings and keeps north slopes damp. Niles Canyon funnels wind and rain down Alameda Creek into the Niles district. Our roof maintenance work in Fremont is mostly about the results of that geography: moss on shaded north slopes, algae streaks under oaks and redwoods, and gutters packed with leaves before the first storm.

The stone-coated flashings we finish every roof with come from California Stone Coating, the Fremont manufacturer. It is a Fremont family business, and the flashings were developed on exactly the kind of roofs this city is full of: low-slope composition shingle ranches with a cluster of plumbing vents that other roofers paint and forget. The paint on those pipes can start to wear off within the first year. A stone-coated flashing matches the shingle color, resists rust, is designed not to chip, peel or fade, and, most importantly, helps waterproof the base of the pipe, which is where metal imperfections and leaks are most likely to start.

On a Fremont roof they also solve a purely local problem. Drive down any street in Glenmoor or Irvington and you will see rows of otherwise tidy houses with faded gray or rust-streaked pipes sticking out of the roof. The stone-coated flashings page explains the process and shows the pipe jacks, O'Hagin vents and valleys that go with it. Every roof we replace in Fremont is finished with them, because the flashings are woven in under the shingle courses as the roof goes down.

Not every Fremont roof needs replacing. A good share of our calls are for a single leak, a section of soffit or fascia that has rotted at a gutter corner, or a chimney flashing that has pulled away from the brick. Our roof repair and leak detection visits in Fremont start with finding the actual source, which on a ranch roof is very often a pipe flashing, a valley, or a skylight curb rather than the spot on the ceiling where the water showed up.

Re-roofing in Fremont requires a building permit from the city's Building and Safety Division. The city offers an express re-roof permit for residential jobs that remove and replace more than 100 square feet of roofing, applied for online through its Citizen Access portal, and we handle that paperwork as part of the job. Fremont is the center of our service area; from here the crew also covers Newark and Union City next door, and Milpitas across the county line.