Old Mill Roofing Co.Compare Irvine roofing quotes without the runaround.My estimate

Irvine prices

Pricing a low-slope roof

Flat roofing is priced by the square like everything else, but the cost sits in the details — terminations, drains, and how the membrane meets every wall it touches.

Start here

No cost to you. Contractors pay us, you do not.

Free · Up to three quotes

Start here

No cost to you. Contractors pay us, you do not.

Step 1 of 6

What best describes your home?

Different buildings need different crews, so this is the first thing a roofer asks.

Nothing is charged and nothing is booked.

Architectural asphalt shingle$11,500 – $29,500About $650 – $950 a square. Rated life 25 to 30 years.
3-tab asphalt shingle$9,500 – $21,500About $525 – $700 a square. Rated life 15 to 20 years.
Impact-rated asphalt shingle$16,000 – $40,500About $900 – $1,300 a square. Rated life 25 to 35 years.

These are estimated ranges, not quotes. Compiled from public installed-cost data for California and adjusted for how Irvine is built. No contractor is bound by them, and nobody can price a roof they have not stood on.

Installed ranges for a 25-square roof in Irvine, CA. One square = 100 square feet.
CoveringPer squareTypical whole roofExpected life
Architectural asphalt shingleThe default choice on most American homes, and usually the right one.$650 – $950$11,500 – $29,50025 to 30 years
3-tab asphalt shingleThe cheapest thing that still counts as a roof. Fewer and fewer crews will install it.$525 – $700$9,500 – $21,50015 to 20 years
Impact-rated asphalt shingleClass 4 rated. Often earns an insurance discount where hail is a factor.$900 – $1,300$16,000 – $40,50025 to 35 years

What moves the price

  • Whether the fasteners and flashing are specified for coastal exposure
  • Warranty tier, which is really a question about who honours it in fifteen years
  • Pitch — anything over about 7:12 needs staging and slows a crew down
  • How much decking turns out to be soft once the covering is stripped
  • How many old layers have to come off before the new one goes on

Locally

Dry offshore wind lifts material that damp coastal air had been holding down. Most wind losses here happen on a handful of nights a year.

Ask where the water goes and what happens when the drain blocks. On a flat roof that is not a detail, it is the design.

These are estimates, not quotes. They are compiled from national installed ranges adjusted for California costs and for how Irvine is built. No contractor is bound by them.

Questions about price

How quickly will someone call?

Usually within the hour during working hours. If you marked the job as an emergency it goes to the front of the queue and is normally picked up faster than that.

What if the decking is rotten underneath?

Expect a few sheets on most older roofs. Get the per-sheet rate in the contract. Open-ended decking charges are where a fixed price stops being fixed.

How long should a roof last here?

Rated life and real life are different numbers. Here, salt and sun together tend to take the low end of any rated life. Ventilation and the quality of the installation move that more than the brand does.

What is it going to cost?

No cost, no obligation, and never more than three contractors.