Roofing Contractor in Ontario, CA

Ontario building department, Symbium portal and San Bernardino County context

Ontario is an incorporated city in San Bernardino County, so re-roof permits run through the city's own building department. For detached single-family homes the city routes applications through an online portal run with Symbium, and its re-roofing bulletin generally calls for planning approval when the roofing material changes. Trading tile for shingle is therefore a question for the city before it is a question of price.

State rules still apply: a third layer is barred over two existing ones, and a re-roof covering more than half the roof often needs a cool-rated product. On a commercial roof the building owner usually has a say, too. Southern California Edison, not LADWP, supplies Ontario's electricity, so the LADWP cool roof rebate does not apply at an Ontario address. Our roof permit page explains who requests what.

Flat roofs around Ontario International Airport

The airport is the eighth-busiest in the US by cargo, and warehouses and shops line the freight belt around it. Most have low-slope roofs with membranes, drains and rooftop units. Water sits where the roof does not drain, and every unit curb and pipe is a seam.

For a commercial roof we walk it, photograph drains and seams and write down what we find. Then we tell you whether repair or coating fits, or whether the roof needs a bigger decision.

Smaller flat roofs on garages and additions behind older houses have the same weak points at smaller scale. Read about flat roofing before you decide.

Santa Ana winds, 1980s tracts and Model Colony streets

Ontario began as the Model Colony in 1882, and the older streets near the original grid carry the oldest roofs. Many newer tracts date to around 1980, so their shingle roofs are on their second or third life. Santa Ana winds lift edges, ridge caps and loose flashing first.

Rain is scarce but sharp. Ontario averages about 11.64 inches a year, with February the wettest month at 3.07 inches and July close to zero. Four dry months bake sealant and seams, and then one winter storm tests every weak spot at once.

After a wind event, stand in the yard and look for tabs that have slipped or debris on the roof, then call us before the next rain.

Euclid Avenue, Ontario Mills and the Ontario Ranch tracts

The Chaffey brothers laid out Euclid Avenue with a wide grassy median, and the stretch from Philadelphia Street in Ontario up to 24th Street in Upland is on the National Register of Historic Places. Older homes near that corridor are the likeliest to carry several layers of past roofing or original board decking, so we check both once the old covering is off. Ontario Mills, which opened in 1996 on the old Ontario Motor Speedway parking lot, anchors the retail edge of the same flat valley floor.

South of the freeways, the former agricultural preserve was rezoned in 1999 and is now Ontario Ranch. Roofs there are far younger than those in the Model Colony, so repairs tend to be flashing, vents or wind damage rather than age. Before any roof replacement in either area, ask the city what your address needs.

Visiting Ontario from Van Nuys

A visit to Ontario is arranged in advance, never a quick stop. Neighbors in Upland and Rancho Cucamonga sit on different city permits, so ask for a quote tied to your own address.