Roof Replacement in Newport Beach: Rotted Decking Repaired, New Shingles
This Newport Beach roof looked fine from the street. Once the old roofing came off, the plank decking at the eaves was rotted through in several places. We repaired the deck and installed a new light-grey shingle roof in October 2025.
Project at a glance
| Location | Newport Beach, CA |
| Completed | October 2025 |
| Project type | Full roof replacement |
| Scope | Tear-off, decking repair and replacement, new underlayment, flashing, architectural shingles, ridge |
What the tear-off found
Original plank decking with rot at the eave line and openings cut for old vents. The photos show the deck stripped bare, with the damaged sections visible.
Repair before roofing
Damaged boards were cut out and replaced, and the fascia was checked before any underlayment went on. Roofing over rot is the shortcut we do not take.
The new roof
Synthetic underlayment, new flashing and a light-grey architectural shingle across the full roof, including the chimney and vent details.
Why you cannot judge a roof from the street
This roof looked fine from the kerb. The shingles were intact, the lines were straight, nothing sagged. The plank decking at the eaves was rotted through in several places, and none of that was visible until the covering came off.
That is the normal case rather than the exception. A roof covering is designed to shed water; when it stops doing so perfectly, the water goes into the deck and the deck absorbs it quietly for years. By the time there is a stain on a ceiling, the sheathing above it has usually been wet through several rainy seasons. A roof inspection from the ground tells you about the shingles. It tells you nothing about the wood underneath, which is the part that costs money.
Plank decking, and what it changes
This house has original plank decking — individual boards laid across the rafters rather than sheets of plywood or OSB. That is normal on older Southern California houses and it is not a defect, but it changes a re-roof in three practical ways.
Boards move independently, so a plank deck flexes more than a sheet deck and old boards can cup or split. Fasteners have to land in wood rather than in a gap, which matters because a nail that misses is a nail that is not holding. And planks were often laid with deliberate gaps under wood shakes, which is fine for shakes and not fine for composition shingles — on those roofs the deck needs sheathing over it before anything else goes on.
The right approach on a plank deck is to replace the bad boards with matching material and keep the rest, which is what we did here. Ripping out sound original decking to sheet the whole roof is expensive and usually unnecessary; leaving rotted boards in place because they are hidden under new shingles is the other failure, and it is more common.
Why eaves rot first
The rot on this roof was at the eave line, which is where it nearly always starts. The eave is the coldest, wettest, least ventilated edge of a roof. It is where wind-driven rain gets pushed back up under the covering, where an overflowing gutter puts water directly against the fascia and the deck edge, and where a missing or badly lapped drip edge lets water track backwards into the sheathing instead of off it.
None of that is dramatic. It is a small volume of water arriving in the same place for years. It is also why the eave detail on a new roof — drip edge, the first course of underlayment, how the flashing laps — deserves more attention than anywhere else on the roof, and why we would rather spend time there than anywhere on the field.
What the coast adds
Newport Beach sits in salt air, and salt accelerates corrosion of anything steel that is not protected: fasteners, flashings, vents, gutter hardware. It is invisible for a long time and then a flashing fails at the joint rather than in the middle. Specifying corrosion-resistant fasteners and flashing near the coast is not an upgrade, it is the baseline — and it is one of the few places where a roof three miles inland and a roof here genuinely need different material.
Before, during and after
Related: Roofing · Orange County service area
What a coastal roof replacement involves
A full tear-off is permitted and inspected in Newport Beach as in every city we serve, with an inspection of the sheathing once the old roof is off and a final when the new roof is complete. Coastal exposure decides the details: corrosion-resistant fasteners and flashings, and underlayment and edge details chosen for wind-driven rain. See roofing for the full scope and Orange County for where we work.
Questions homeowners ask about a roof replacement
My roof looks fine. How do I know if it needs replacing?
Age, and what a proper inspection finds. From the ground you can see granule loss, curling, missing tabs and patched areas. What you cannot see is the deck. If the roof is at the end of its expected life, the useful question is not whether the shingles look acceptable but what the sheathing has been doing underneath them.
Will you know what the decking costs before you start?
Not exactly, and anyone who promises otherwise is either padding the bid or planning a change order. The deck is inspected once the covering is off. What a proposal should carry is a clear unit price for replacing damaged decking, so the number is agreed before anyone finds anything.
Can the old decking be left if it is only slightly damaged?
No. Wet or rotted sheathing does not recover once it is covered, it does not hold fasteners reliably, and it is the one part of the assembly that cannot be inspected again without stripping the roof a second time. Replacing it is a fraction of what a second re-roof costs.
Does a re-roof need a permit and an inspection?
Yes. A roof replacement is permitted work, and the sheathing is inspected after the tear-off and before the new covering goes on — roofing material is not to be applied until the required inspections have been made and approved in writing. That inspection is the only moment when the bare deck is visible to somebody other than the roofing crew, which is precisely why it exists.
Are there energy requirements on a new roof?
There can be. Depending on the climate zone and the slope, California’s energy code requires the new covering to carry a Cool Roof Rating Council rating (California Energy Code sections 10-113 and 150.2(b)1(H)). It is worth settling before materials are ordered rather than after.
How many layers of roofing am I allowed?
Two, at most, in California. If the house already carries two, the next roof is a full tear-off. See our Buena Park roof replacement for how that plays out on a roof that had been patched before, and the roof replacement cost guide for what the numbers look like in Los Angeles.
Thinking about a similar project?
Every re-roof we do includes a deck inspection after tear-off, and we show you the damaged sections before we repair them. Green Design and Build is a licensed residential general contractor (CSLB #1110975) based in Van Nuys. We reply within one business day.