FIELD NOTE · SUPPLEMENTAL SET
Built-up roofing, off in phases: what a reroof permit line commits
ISSUEDJULY 11, 2026DRAWN BY THE NIGHTLY SWEEP
A built-up roof at 3210 Merryfield Row in San Diego is coming off in phases, and the public description of that work runs 536 characters and three sentences, opening on Phase 2 roof replacement for an existing industrial building.
The approval is PMT-3369238, issued by the City of San Diego on 2025-10-17 at a valuation of 1,300,000 USD.
The code does not read that as a description.
It takes the box as a percentage, a rolling clock, a fire zone, a climate zone and a license split. It holds the applicant to all five, sight unseen, on a sentence typed into a form months before anybody stood on the roof.
PMT-3369238, City of San Diego, issued 2025-10-17, valuation 1,300,000 USD, permit holder DOME Construction, scope text as published in the Development Services approvals file. The permit was created as a project on 2025-07-30 and entered as an approval on 2025-08-13, which puts it on the 2022 cycle; the annotations show what the same sentence commits under the 2025 cycle, in force for applications filed on or after January 1, 2026.
The deciding date is not the one the record leads with.
A line like this one, filed now, commits considerably more. Section 1505.1.2 of the 2025 California Building Code provides that replacing more than 50 percent of the total roof area within any one-year period pulls the entire covering up to Class C. Inside a fire hazard severity zone the same arithmetic costs more: the California Wildland-Urban Interface Code, Title 24 Part 7, which did not exist before January 1, 2026, provides at Section 507.1 that a covering replaced, or 50 percent or more replaced in a 12-month period, comes back as a covering required for new construction. Section 504.2 makes that a Class A assembly tested to ASTM E108 or UL 790.
Two counters, both 12 months. Both run backward from whatever gets filed next.
Repair is the category an estimator is trained to treat as exempt, and Section 507.1 carries a second sentence reaching any portion of a roof covering applied during an addition, alteration or repair, and requiring at least a Class A fire classification.
No percentage gate.
CWUIC 202 counts any state-identified fire hazard severity zone as wildland-urban interface area, and Section 302.2 has the code official reevaluating those areas on a five-year basis or more frequently, which is a ceiling of 60 months rather than a fixed interval. Whether San Diego has amended Part 7 locally is a separate question, and the approvals record does not answer it.
The fire class is partly a mapping question.
The phrase Phase 2 asserts a Phase 1, and no Phase 1 roof approval appears at 3210 Merryfield Row anywhere in the 139,422 approvals the city published from January 2024 through July 2026. The code creates the obligation and names no procedure for measuring it.
The verb is defined as well: Section 1512.2 makes a roof replacement the removal of all existing layers of roof assembly materials down to the roof deck. Once the work crosses the lesser of 50 percent of the roof area or 2,000 square feet, Section 141.0(b)2B attaches Table 141.0-C to the replaced area, R-23 of continuous insulation across most of the state and R-17 in climate zones 6 through 8. Exception 2 to Section 141.0(b)2Bii then hands part of that back, capping added insulation at the greater of R-10 or the thickness that holds base flashing at the manufacturer's height, wherever existing rooftop equipment will not be disconnected and lifted.
The long second sentence of the scope box answers exactly half of the question that exception asks, and it answers the cheap half: removal of mechanical equipment that is not in service. The difference between the two answers is R-23 against R-10 across the whole replaced area.
The scope line does not ask.
Overlay is not a term either code uses: the Energy Code defines roof recover at Section 100.1(b) as installing an additional covering over a prepared existing covering without removing it. The Building Code, at Section 1512.3, permits that except where the existing roof is water-soaked or deteriorated past use as a base, where the existing covering is slate, clay, cement or asbestos-cement tile, or where the roof already carries two or more applications of any covering. The description asserts none of that, and what decides whether a 3,766,400 USD permit is lawful is a layer count appearing nowhere in it, established later, by whoever opens the roof.
TPO membrane names a product, and the Energy Code reads the name as numbers: Section 140.3(a)1A puts nonresidential low-sloped roofs in climate zones 1 through 16 at an aged solar reflectance of 0.63 with a thermal emittance of 0.75, or at a solar reflectance index of 75. What Title 24 asks of a rooftop replacement turns on area rather than on the material named. Aged is a defined condition rather than an adjective: the Cool Roof Rating Council weathers samples at two approved test farms, one in Phoenix and one in Homestead, Florida, for 36 months before retesting them.
In the published record the scope box is the only description of the work there is, written by whoever pulls the roofing permit in the time it takes to fill a field. What the sentence committed comes due at the inspection, against a price already fixed and a deck already open.
CLOCKS RUNNING BEHIND A REROOF LINE, IN MONTHS CLASS C COUNTER, CBC 1505.1.2 12 CLASS A COUNTER, CWUIC 507.1 12 AGED REFLECTANCE, FIELD WEATHERING 36 FIRE ZONE MAPS REEVALUATED, CWUIC 302.2 60 max
In-kind and like-for-like are not code categories and buy no exemption from anything.
Sheathing if needed is an unpriced allowance written into a public document, and among these three scope lines it is the only phrase admitting the roof has not been opened.
Temporarily removed and reinstalled is a second permit, and in Los Angeles County it is a second license as well. Building Code Manual 1512, Article 1, dated 4-1-2025, requires a separate solar permit for the reinstallation, with its own prescribed work description. The same manual records the Contractors State License Board position that reroofing be performed by a C-39 and the reinstallation by a C-10 or a C-46, unless the contractor holds an A or a B, in which case one licensee may apply for both trades. Those classifications come from 16 CCR 832.39 and 832.46, which define the trades rather than mandate the split.
The pairing is hard to see in the text, because rooftop photovoltaic work files under its own approval type with the scope field left blank, and of 14,520 Photovoltaic SB 379 approvals in the published file 14,516 carry no scope text at all, so a search for solar across the San Diego reroof stream returns almost nothing, and the join has to run on the parcel instead.
The sentence in the scope box on PMT-3369238 went in under DOME Construction's permit on 2025-08-13, before the deck was open, and it committed the fire class, the insulation obligation, the license split and the governing edition in one pass, none of which the crew standing on the tear-off gets to renegotiate.
It names Phase 2 and does not date Phase 1.
The approval is PMT-3369238, issued by the City of San Diego on 2025-10-17 at a valuation of 1,300,000 USD.
The code does not read that as a description.
It takes the box as a percentage, a rolling clock, a fire zone, a climate zone and a license split. It holds the applicant to all five, sight unseen, on a sentence typed into a form months before anybody stood on the roof.
PMT-3369238, City of San Diego, issued 2025-10-17, valuation 1,300,000 USD, permit holder DOME Construction, scope text as published in the Development Services approvals file. The permit was created as a project on 2025-07-30 and entered as an approval on 2025-08-13, which puts it on the 2022 cycle; the annotations show what the same sentence commits under the 2025 cycle, in force for applications filed on or after January 1, 2026.
Built-up roofing, off in phases, on the previous cycle
Which edition governs is decided by the permit application date rather than the issue date, per HCD Information Bulletin 2025-03. The record publishes both dates, and they are not close together: PMT-3369238 was created as a project on 2025-07-30 and entered as an approval on 2025-08-13, months before the 2025 California Building Standards Code took effect for applications filed on or after January 1, 2026. So the roof at Merryfield Row comes off under the 2022 cycle.The deciding date is not the one the record leads with.
A line like this one, filed now, commits considerably more. Section 1505.1.2 of the 2025 California Building Code provides that replacing more than 50 percent of the total roof area within any one-year period pulls the entire covering up to Class C. Inside a fire hazard severity zone the same arithmetic costs more: the California Wildland-Urban Interface Code, Title 24 Part 7, which did not exist before January 1, 2026, provides at Section 507.1 that a covering replaced, or 50 percent or more replaced in a 12-month period, comes back as a covering required for new construction. Section 504.2 makes that a Class A assembly tested to ASTM E108 or UL 790.
Two counters, both 12 months. Both run backward from whatever gets filed next.
Repair is the category an estimator is trained to treat as exempt, and Section 507.1 carries a second sentence reaching any portion of a roof covering applied during an addition, alteration or repair, and requiring at least a Class A fire classification.
No percentage gate.
CWUIC 202 counts any state-identified fire hazard severity zone as wildland-urban interface area, and Section 302.2 has the code official reevaluating those areas on a five-year basis or more frequently, which is a ceiling of 60 months rather than a fixed interval. Whether San Diego has amended Part 7 locally is a separate question, and the approvals record does not answer it.
The fire class is partly a mapping question.
The phrase Phase 2 asserts a Phase 1, and no Phase 1 roof approval appears at 3210 Merryfield Row anywhere in the 139,422 approvals the city published from January 2024 through July 2026. The code creates the obligation and names no procedure for measuring it.
The verb is defined as well: Section 1512.2 makes a roof replacement the removal of all existing layers of roof assembly materials down to the roof deck. Once the work crosses the lesser of 50 percent of the roof area or 2,000 square feet, Section 141.0(b)2B attaches Table 141.0-C to the replaced area, R-23 of continuous insulation across most of the state and R-17 in climate zones 6 through 8. Exception 2 to Section 141.0(b)2Bii then hands part of that back, capping added insulation at the greater of R-10 or the thickness that holds base flashing at the manufacturer's height, wherever existing rooftop equipment will not be disconnected and lifted.
The long second sentence of the scope box answers exactly half of the question that exception asks, and it answers the cheap half: removal of mechanical equipment that is not in service. The difference between the two answers is R-23 against R-10 across the whole replaced area.
The scope line does not ask.
TPO over a layer count nobody has stated
Otay Mesa, PMT-3405765, issued 2026-04-07 at a valuation of 3,766,400 USD: building permit for the installation of TPO membrane for roof overlay for an existing commercial building; one sentence of description, entered as an approval on 2026-03-11, which puts this one squarely on the 2025 cycle.Overlay is not a term either code uses: the Energy Code defines roof recover at Section 100.1(b) as installing an additional covering over a prepared existing covering without removing it. The Building Code, at Section 1512.3, permits that except where the existing roof is water-soaked or deteriorated past use as a base, where the existing covering is slate, clay, cement or asbestos-cement tile, or where the roof already carries two or more applications of any covering. The description asserts none of that, and what decides whether a 3,766,400 USD permit is lawful is a layer count appearing nowhere in it, established later, by whoever opens the roof.
TPO membrane names a product, and the Energy Code reads the name as numbers: Section 140.3(a)1A puts nonresidential low-sloped roofs in climate zones 1 through 16 at an aged solar reflectance of 0.63 with a thermal emittance of 0.75, or at a solar reflectance index of 75. What Title 24 asks of a rooftop replacement turns on area rather than on the material named. Aged is a defined condition rather than an adjective: the Cool Roof Rating Council weathers samples at two approved test farms, one in Phoenix and one in Homestead, Florida, for 36 months before retesting them.
In the published record the scope box is the only description of the work there is, written by whoever pulls the roofing permit in the time it takes to fill a field. What the sentence committed comes due at the inspection, against a price already fixed and a deck already open.
CLOCKS RUNNING BEHIND A REROOF LINE, IN MONTHS CLASS C COUNTER, CBC 1505.1.2 12 CLASS A COUNTER, CWUIC 507.1 12 AGED REFLECTANCE, FIELD WEATHERING 36 FIRE ZONE MAPS REEVALUATED, CWUIC 302.2 60 max
Sheathing if needed, and an array that comes off
North Park, PMT-3417009, issued 2026-07-16 at 18,075 USD and entered as an approval on 2026-05-15: an in-kind roof replacement of an existing single dwelling unit, 14 squares of TPO and sheathing if needed, with existing solar panels to be temporarily removed and reinstalled.In-kind and like-for-like are not code categories and buy no exemption from anything.
Sheathing if needed is an unpriced allowance written into a public document, and among these three scope lines it is the only phrase admitting the roof has not been opened.
Temporarily removed and reinstalled is a second permit, and in Los Angeles County it is a second license as well. Building Code Manual 1512, Article 1, dated 4-1-2025, requires a separate solar permit for the reinstallation, with its own prescribed work description. The same manual records the Contractors State License Board position that reroofing be performed by a C-39 and the reinstallation by a C-10 or a C-46, unless the contractor holds an A or a B, in which case one licensee may apply for both trades. Those classifications come from 16 CCR 832.39 and 832.46, which define the trades rather than mandate the split.
The pairing is hard to see in the text, because rooftop photovoltaic work files under its own approval type with the scope field left blank, and of 14,520 Photovoltaic SB 379 approvals in the published file 14,516 carry no scope text at all, so a search for solar across the San Diego reroof stream returns almost nothing, and the join has to run on the parcel instead.
The sentence in the scope box on PMT-3369238 went in under DOME Construction's permit on 2025-08-13, before the deck was open, and it committed the fire class, the insulation obligation, the license split and the governing edition in one pass, none of which the crew standing on the tear-off gets to renegotiate.
It names Phase 2 and does not date Phase 1.