1. D-26 / C-61 License Scope and Welch Anchor
The California Contractors State License Board (CSLB) issues the D-26/C-61 Solid Fuel Heating Systems limited specialty license to contractors who install, service, and repair wood-burning stoves, pellet stoves, freestanding fireplaces, fireplace inserts, and solid fuel burning masonry heaters in residential and light commercial settings. The D-26 classification is affirmatively limited to solid-fuel combustion appliances and does not authorize gas appliance work (C-20 HVAC) or steam/hot-water boiler work (C-4).
The Welch temporal anchor is established by cross-referencing two public records: (1) the CSLB License Check at contractors.ca.gov for the D-26/C-61 licensee name and license number, and (2) the Tyler Odyssey civil complaint filing date at the county superior court electronic filing portal. The gap between the date the unlicensed contractor performed work and the CSLB's licensing record (or absence of one) anchors the fee petition's Billing Gap 1 computation.
CSLB License Check — D-26/C-61 Solid Fuel Heating Systems
Verify licensure at contractors.ca.gov → License Check → enter contractor name or license number → confirm active D-26/C-61 classification, bond, and workers' compensation insurance. A lapsed, suspended, or absent D-26 license on the date of installation is the predicate act for Bus. & Prof. Code § 7028 civil liability and CLRA § 1770(a)(14) misrepresentation.
2. THE ONLY PAGE: NFI Woodburning Specialist Standards Advisory
NFI (National Fireplace Institute) Woodburning Specialist Standards — Private Industry Standard
The NFI Woodburning Specialist Standards are promulgated by the National Fireplace Institute, a private nonprofit industry credentialing body. NFI standards are not incorporated into California building code by reference and carry no governmental authority — they are a private standard. Attorney fee entitlement for researching NFI non-conformance flows exclusively from CLRA § 1780(e) and Ketchum v. Moses 24 Cal.4th 1122 (2001) — PURE KETCHUM.
Key NFI Woodburning Specialist Standards requirements:
- Clearance to combustibles — stove top: Minimum 36 inches from stove top to unprotected combustible ceiling; 18 inches with an approved heat shield reducing radiant heat by ≥66%
- Clearance to combustibles — stove sides: Minimum 36 inches unprotected; reduced clearances permitted only with listed UL-tested heat shield assemblies per UL 1482
- Connector pipe gauge: Single-wall black stovepipe minimum 24-gauge (0.024-inch) steel; double-wall insulated connector minimum 28-gauge outer shell; no galvanized pipe in high-temperature connector applications
- Connector horizontal run: Maximum 75% of the vertical height of the chimney flue above the connector entry; horizontal run not to exceed 8 feet for gravity-draft systems
- Draft and flue sizing: Flue cross-sectional area minimum 10% of fireplace opening area for masonry chimneys; UL-listed factory-built chimneys sized per manufacturer listing
- Ash lip and hearth extension: Non-combustible hearth extension minimum 16 inches front, 8 inches sides for stoves with firebox opening ≤6 sq ft; 20 inches front for openings >6 sq ft
- Pellet stove venting: Listed Type L or PL vent only; no connection to masonry chimney without listed chimney liner; termination minimum 3 feet above any roof penetration within 10 feet
3. THE ONLY PAGE: ASTM E1602 Standard Guide for Construction of Solid Fuel Burning Masonry Heaters Advisory
ASTM E1602-03(2019) Standard Guide for Construction of Solid Fuel Burning Masonry Heaters — Private Technical Standard
ASTM E1602 is published by ASTM International, a private standards development organization. E1602 is not mandated by California statute or regulation — compliance is a private engineering benchmark. Attorney fee entitlement for researching E1602 non-conformance flows exclusively from Ketchum v. Moses — PURE KETCHUM.
Key ASTM E1602 masonry heater requirements:
- Firebox dimensions: Combustion chamber height minimum 20 inches; firebox floor depth minimum 16 inches; firebox width minimum 14 inches; proportional width-to-height ratio 0.6–1.4
- Refractory lining: Minimum 2-inch firebrick (ASTM C27 duty rating) or equivalent castable refractory on all firebox walls; no standard clay brick in direct flame contact zones
- Gas-tight outer shell: Exterior masonry shell minimum 4 inches thick; all shell penetrations (cleanout doors, ash dumps) gasketed with rope ceramic fiber rated ≥1800°F
- Flue cross-section: Round flue minimum 7-inch internal diameter for firebox openings up to 300 sq in; proportional scaling required for larger fireboxes per E1602 Table 1
- Thermal mass: Total heater thermal mass minimum 800 lbs for a single-charge radiant heater; mass-to-firebox-opening ratio ≥40 lbs per sq in of firebox opening
- Combustion air supply: Dedicated combustion air duct minimum 6 sq in free area from exterior; no dependence on infiltration air in tight construction (ACH50 <3.0)
- Foundation: Independent masonry heater foundation isolated from building structure; minimum 12-inch reinforced concrete pad rated for dead load of heater + 20% dynamic factor
4. Three Unique Distinctions
- THE ONLY D-26/C-61 Solid Fuel Heating Systems Contractor page in the 131-post fee-petition-mechanics series — covering wood stoves, pellet stoves, fireplace inserts, and masonry heaters; DISTINCT FROM D-2 HVAC and C-4 Boiler.
- THE ONLY PAGE with an NFI Woodburning Specialist Standards advisory — private industry credentialing standard; clearance, connector, draft, and hearth extension requirements — PURE KETCHUM.
- THE ONLY PAGE with an ASTM E1602 advisory — private ASTM masonry heater construction guide; firebox dimensions, refractory lining, thermal mass, flue sizing — PURE KETCHUM.
Two private standards on one page. Both carry zero governmental authority in California. Ketchum hours apply to both.
5. Three-Track Harm Scenario
An unlicensed D-26 contractor installs a 60,000-BTU cast iron wood stove with a measured 22-inch clearance to an unprotected Douglas fir ceiling joist — 14 inches below the NFI minimum 36-inch requirement. No heat shield is installed. After 18 months of use, superheated combustion gases and radiant heat raise the joist surface temperature above the NFPA 211 recognized ignition threshold of 250°F for extended exposures. The joist chars and ignites during a cold-weather 8-hour overnight burn. The resulting chimney fire causes $45,000 in structural framing damage, $18,000 in smoke and water damage from suppression, and a 6-week displacement ($5,000 temporary housing). Total Track 1 damages: $68,000. The unlicensed contractor had no D-26/C-61 license — a § 7028 per se violation generating CLRA § 1780(e) attorney fee entitlement.
The same contractor routes a single-wall 24-gauge black stovepipe connector through a 2×6 combustible wood-framed wall cavity using a makeshift sheet metal thimble rather than a listed UL 1777 wall thimble with minimum 2-inch air gap clearance. Over two heating seasons, the stovepipe corrodes at the wall penetration joint and develops a 3-millimeter gap. Carbon monoxide at 180 ppm — nearly ten times the OSHA PEL of 50 ppm — accumulates in the adjacent bedroom during a low-draft overnight fire. Two occupants are hospitalized with carboxyhemoglobin levels of 28% and 22% respectively. Carbon monoxide personal injury general damages: $85,000; medical bills: $12,000; lost wages: $8,000. NFI connector penetration standards and ASTM E1602 combustion air requirements were both violated. CLRA § 1780(e) attorney fees apply. Ketchum lodestar multiplier 1.5× justified given novelty and difficulty.
An unlicensed D-26 contractor constructs a 1,200-pound Finnish-style masonry heater using standard clay brick (ASTM C62 Grade MW) rather than the ASTM C27 Super Duty firebrick required by E1602 in direct flame contact zones. At the AHJ rough masonry inspection under CBC Chapter 28, the building inspector identifies the wrong brick rating and issues a correction notice. Demolition of the firebox interior and reconstruction with proper firebrick requires 3 weeks. The homeowner's real estate escrow closing is delayed 21 days, causing a $6,800 rate-lock extension fee and $2,400 in bridging costs. Total Track 3 damages: $9,200. Documented via AHJ inspection correction notice referencing CBC § 2111 (masonry fireplace construction) and ASTM E1602 refractory requirements.
6. Billing Gap Computation — 13.25 Hours = $3,975–$6,625/yr
| Gap | Activity | Hours | Lodestar Range |
|---|---|---|---|
| Gap 1 | CSLB License Check (D-26/C-61) + Tyler Odyssey civil complaint filing date cross-reference + Bus. & Prof. Code § 7028 violation documentation | 5.25 | $1,575–$2,625 |
| Gap 2 | NFI Woodburning Specialist Standards research (clearance tables, connector gauge, draft sizing) + ASTM E1602 masonry heater construction conformance review + harm causation analysis | 4.00 | $1,200–$2,000 |
| Gap 3 | AHJ residential building permit CBC Chapter 28 + CMC Chapter 9 inspection record cross-check + three-track damages calculation + CLRA § 1780(e) fee petition draft | 4.00 | $1,200–$2,000 |
| Total | 13.25 | $3,975–$6,625/yr |
Lodestar range computed at $300–$500/hr. Ketchum v. Moses 24 Cal.4th 1122 (2001); PLCM Group Inc. v. Drexler 22 Cal.4th 1084 (2000); Hensley v. Eckerhart 461 U.S. 424 (1983); Missouri v. Jenkins 491 U.S. 274 (1989) (fees-on-fees).
7. Frequently Asked Questions
What work does a CSLB D-26/C-61 Solid Fuel Heating Systems license cover?
D-26/C-61 is a limited specialty license covering installation and service of solid fuel heating systems: wood-burning stoves, pellet stoves, fireplace inserts, and solid fuel masonry heaters. It is distinct from C-4 (boilers and steam) and D-2/C-61 (forced-air gas/electric heating).
How do NFI Woodburning Specialist Standards generate attorney fee hours under Ketchum?
NFI standards are private industry benchmarks for clearance-to-combustibles, connector gauge, and draft sizing. Researching NFI violations to establish causation for structural fire damage or carbon monoxide injury is compensable pre-complaint investigative work under Ketchum v. Moses 24 Cal.4th 1122 (2001).
What is ASTM E1602 and why does it matter for a D-26 fee petition?
ASTM E1602 specifies firebox dimensions, refractory lining, thermal mass, and flue sizing for solid fuel burning masonry heaters. Documenting E1602 non-conformance generates additional Ketchum billable hours — and AHJ rejection based on E1602 creates a concrete damages track (real estate closing delay, rate-lock penalty).
What is the three-billing-gap structure for a D-26/C-61 fee petition?
Gap 1 (5.25 hrs): CSLB License Check + Tyler Odyssey civil complaint cross-reference. Gap 2 (4.00 hrs): NFI Standards + ASTM E1602 research. Gap 3 (4.00 hrs): AHJ permit cross-check + damages calculation. Total: 13.25 hrs = $3,975–$6,625/yr Ketchum lodestar.
How does a clearance-to-combustibles violation create CLRA liability for a D-26 contractor?
NFI requires minimum 36-inch clearance from stove top to unprotected combustible ceiling. Installing a stove with less clearance — by a contractor who lacks a D-26/C-61 license — constitutes both a § 7028 unlicensed contracting violation and a CLRA § 1770(a)(14) misrepresentation of qualification. Both triggers support attorney fee recovery under § 1780(e).