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The Complete Guide to Roofing

For a day-one crew member growing toward master level at AMN Construction, a licensed residential general contractor working in Montecito and Santa Barbara, California. Plain English, no hype. Research accessed 2 November 2026.

Four rules to know before anything else

  1. Falls. Cal/OSHA Title 8 section 1731 (residential-type roofing): on slopes 0:12 up to 7:12, protect at 6 ft of fall distance or more; on slopes steeper than 7:12, protect at any height. A written fall plan is allowed only when conventional methods are infeasible. S4
  2. Montecito fire class. Every new or replacement roof must be Class A. Wood shake and wood shingle are banned, even if the assembly is rated. Replacing or adding more than 10 percent of total roof area means a whole-roof Class A replacement. Montecito Fire reviews first, then the County inspects. S8
  3. Shingle, underlayment and nail numbers are from an old book. They come from a 2006 IRC consumer guide, not the 2025 California Residential Code. Verify every one in CRC 2025 R905 and the shingle maker's wrapper before you rely on it. S17
  4. Some things are simply not known yet. The County building-code edition, ember-resistant vent rules, permit fees, design review, coastal and hillside rules, and any phone number were not confirmed. Unconfirmed See open items.

How to read the tags

S#Sourced. Links to the numbered source at the end of this page.
GComputed geometry or arithmetic, checked by recalculation.
PCrew practice. No web page behind it. Treat as a habit to confirm, not a rule.
CConfirm with the building official before relying on it.
?Unverified.
VerifyThe research marks this as needing a check against the current code or the product maker.
ContestedSources disagree. The page says which one we used.
UnconfirmedNot found, or seen only in a weak source. Do not quote it to a customer.

The approved plans, the adopted California codes and your inspector overrule this guide. Calculators and 3D tools: Roofing math and Roofing tools.

1. Day 1: Staying alive on a roof

  • Cal/OSHA Title 8 Section 1730 covers roof hazards; roofing employers must also comply with Sections 1509 and 1510 (general requirements and training) S2.
  • Residential-type roofing (re-roofing, tear-off, loading and installing materials on single-family homes, townhouses, duplexes) is defined in Section 1731 S4.
  • On slopes from 0:12 up to and including 7:12, protect workers when the fall distance is 6 ft or more; on slopes steeper than 7:12, protect at any height S4.
  • Fall distance is measured from the working surface to the ground or level below; parapet height is not counted. The parapet wording was seen in Section 1730 subsection (g), which only sets how roof height is measured (amended effective 7-1-2025); confirm it applies to residential-type work under 1731 S2 Verify.
  • Accepted protection: personal fall protection, scaffolds, safety nets, guardrails. A written fall protection plan with monitors and controlled access zones is allowed only if conventional methods are infeasible S4.
  • Fall-arrest uses a full-body harness, never a body belt; anchor rated 5,000 lb per worker or a safety factor of 2 S10S12.
  • Never anchor to sheathing alone; tie to trusses or rated D-rings S12.
  • Cover skylights and openings before work; they are not a guardrail S12.
  • A trade-group page says the residential fall-protection trigger height dropped to 6 ft in 2025; only a search snippet was seen. Treat as unverified; use S4 S18. Unconfirmed: snippet only

Ladder drill G P Unconfirmed

At a 14 ft eave with the common 4 to 1 rule, the 4 to 1 rule of thumb puts the base 14 / 4 = 3.5 ft out. OSHA 1926.1053(b)(5)(i) sets the foot at one-quarter of the working length along the ladder, which is about 3.6 ft at 14 ft, so round up. Ladder length = sqrt(14^2 + 3.5^2) + 3 ft above the edge = 14.43 + 3 = 17.4 ft, so use an 18 ft ladder. The 3 ft above the edge is from OSHA S12. The 4 to 1 ratio was not confirmed in any source opened.

Go play with it Math: Fall protection trigger (Cal/OSHA residential roofing) Math: Ladder length and setback Tool: Full-body harness Tool: Lanyard with deceleration device Tool: Roof anchor and D-ring Tool: Guardrail system (temporary) Tool: Extension ladder (with roof hook option) Tool: Skylight and opening cover

Try it Walk a mock eave: measure the fall distance to the ground with a tape, then say out loud whether protection is required at 4:12 and at 9:12.

Check yourself

  • A 3 ft fall off a 9:12 roof: protection required?
    Answer

    Yes, slopes steeper than 7:12 need protection at any height (S4).

  • What is the anchor strength for fall arrest?
    Answer

    5,000 lb per worker, or part of a system with a safety factor of 2 (S10).

  • Can you tie to sheathing alone?
    Answer

    No; tie to framing or a rated anchor (S12).

2. Roof words you must know

  • Eave: the low edge. Rake: the sloped gable edge. Ridge: the peak. Valley: where two slopes meet. Hip: outward corner P.
  • Deck (sheathing) is what the covering is nailed to; it must be solid before covering S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Underlayment goes between deck and covering; drip edge sits at eaves and rakes S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Flashing seals wall, pipe and valley transitions P.
  • A 'square' is 100 sq ft of roof G.
  • Pitch is rise in inches per 12 inches of horizontal run, written like 6:12 G.

Go play with it Math: Roof squares and waste Tool: Speed square / rafter square Tool: Slope / pitch gauge (level)

Try it Label eight parts on a roof photo or model in 5 minutes.

Check yourself

  • What is a square?
    Answer

    100 sq ft of roof.

  • What does 6:12 mean?
    Answer

    6 in of rise per 12 in of run.

  • Where does drip edge go?
    Answer

    At the eaves and rakes.

3. Reading slope and measuring area

  • Pitch factor = sqrt(1 + (rise/12)^2); true area = plan area x factor G.
  • At 6:12 the factor is 1.118: 1,500 sq ft of plan becomes 1,677 sq ft G.
  • Slope length = (run + overhang) x pitch factor G.
  • Percent slope = rise/12 x 100; 6:12 is 50 percent G.
  • Asphalt shingles: 2:12 or steeper (IRC 2006 consumer guide basis; verify current CRC R905) S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Double underlayment applies on low slopes (2:12 up to about 4:12); the exact edge is contested: verify in CRC 2025 S17. Verify: 2006 IRC guide, not the 2025 CRCContested
  • Use the math page calculators: roof-squares, true-area, slope-check, rafter-length.

Pitch factors, recomputed

PitchFactorPercent slopeAngleShingle minimum check
2:121.01416.7%9.5°Double underlayment band (old-guide basis)
3:121.03125%14°Double underlayment band (old-guide basis)
4:121.05433.3%18.4°Steeper band (old-guide basis)
5:121.08341.7%22.6°Steeper band (old-guide basis)
6:121.11850%26.6°Steeper band (old-guide basis)
7:121.15858.3%30.3°Steeper band (old-guide basis)
8:121.20266.7%33.7°Steeper band (old-guide basis)
9:121.25075%36.9°Steeper band (old-guide basis)
10:121.30283.3%39.8°Steeper band (old-guide basis)
11:121.35791.7%42.5°Steeper band (old-guide basis)
12:121.414100%45°Steeper band (old-guide basis)

Factor = sqrt(1 + (rise/12)^2) G. The last column uses the 2:12 and 4:12 breaks from the 2006 guide Verify Contested because the sources word the 4:12 edge two ways: the IRC wording is from 2:12 up to below 4:12.

Go play with it Math: Roof squares and waste Math: True roof area from plan area (pitch factor) Math: Slope percent and shingle-minimum check Math: Rafter / slope length Tool: Slope / pitch gauge (level) Tool: Speed square / rafter square Tool: Tape measure

Try it Measure a plan area, read the pitch with a gauge, and compute squares with 12 percent waste.

Check yourself

  • Pitch factor for 6:12?
    Answer

    1.118.

  • 1,500 sq ft plan at 6:12 gives how many squares incl. 12% waste (rounded up)?
    Answer

    19.

  • Why verify the slope minimum in the current code?
    Answer

    The figure comes from an IRC 2006 guide, not the 2025 CRC.

4. Your tools and protective gear

  • Core PPE: harness, lanyard, safety glasses, cut-resistant gloves, hearing protection (see tools page) P.
  • Hand tools: roofer's hatchet, flat bar, utility knife, snips, chalk line, speed square, tape P.
  • Power tools: pneumatic coil nailer and air compressor; set pressure per the maker, test-fire, drive flush P.
  • Overdriven nails cut the mat; underdriven nails lift shingles P.
  • Wear eye protection whenever nailers run P.
  • Carry only what you need up the ladder; use a hoist or rope for the rest P.

Go play with it Tool: Full-body harness Tool: Safety glasses Tool: Cut-resistant gloves Tool: Roofer's hatchet Tool: Pneumatic coil nailer Tool: Air compressor Tool: Hearing protection

Try it Set a nailer to flush on scrap deck in 5 test shots.

Check yourself

  • Why test-fire a nailer?
    Answer

    To set depth flush before touching the roof.

  • What goes on before any edge work?
    Answer

    Fall protection.

  • Why use a hose reel?
    Answer

    Avoid kinks and trip hazards.

5. Dust, silica and cutting tile

  • Cutting concrete or clay tile makes respirable crystalline silica. OSHA's PEL is 50 micrograms per cubic meter (8-hr average); the action level is 25 S9.
  • Handheld saws with an integrated water feed: no respirator is needed outdoors up to 4 hr per shift; indoors or enclosed needs APF 10 protection S9.
  • Walk-behind saws with water: keep water flowing, vacuum or wash slurry promptly S11.
  • Use a HEPA vacuum, not a regular one, on silica dust S11.
  • A respirator needs a fit test S9P.

Go play with it Tool: Walk-behind saw with integrated water feed Tool: HEPA shop vacuum Tool: Half-mask respirator with P100 filters

Try it Practice a full respirator seal check and name where the water feed connects on a saw.

Check yourself

  • What is the OSHA silica PEL?
    Answer

    50 micrograms per cubic meter, 8-hr TWA.

  • Dry cutting indoors?
    Answer

    Not allowed without controls; use water and protection.

  • Which vacuum?
    Answer

    HEPA.

6. Roofing materials and when to use them

  • CSLB C-39 lists asphaltum, pitch, tar, felt, glass fabric, urethane foam, metal roofing, flax, shakes, shingles, roof tile and slate S1.
  • Asphalt shingles: common on 2:12 and steeper S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Clay and concrete tile: heavy; install needs a pump-jack or ladder plan and fall protection; cutting makes silica dust S12S9.
  • Low-slope single-ply (TPO/PVC): hot-air welded seams, probed and logged S13S14.
  • Wood shake and shingle roofs are prohibited in Montecito even if Class A rated S8.
  • In Montecito all new and replacement roofs must be Class A S8.

Go play with it Tool: Class A roof assembly Tool: Asphalt shingles (strip / laminated) Tool: Concrete / clay roof tile Tool: TPO / PVC single-ply membrane

Try it Match five sample photos to a material and a slope range.

Check yourself

  • Wood shakes in Montecito?
    Answer

    Not allowed, even if Class A.

  • Which materials are heavy?
    Answer

    Clay and concrete tile.

  • Low-slope sheet roofing is joined by?
    Answer

    Hot-air welding.

7. Deck, underlayment and drip edge

  • Walk the deck and mark soft spots; replace soft or split boards before covering S17P. Verify: 2006 IRC guide, not the 2025 CRC
  • Steeper slope (4:12 and up): single underlayment layer, 2 in lap S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Low slope: double layer; 19 in starter strip; overlaps offset by 6 ft at ends (IRC 2006 basis; verify) S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Drip edge: corrosion-resistant metal at least 0.019 in thick at eaves and rakes S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Cap nails fasten synthetic underlayment; stagger seams P.
  • Use the calculators: underlay-steep, underlay-low, drip-edge.

Go play with it Math: Underlayment courses, 4:12 and steeper Math: Underlayment, low slope (double layer) Math: Drip edge sticks Tool: Synthetic underlayment Tool: Self-adhered underlayment (ice-and-water type) Tool: Metal drip edge Tool: Plastic-cap nails

Try it Snap lines, lay two courses of underlayment and measure the lap.

Check yourself

  • Lap on steeper slopes?
    Answer

    2 in.

  • Drip edge minimum thickness in the guide?
    Answer

    0.019 in.

  • Why stagger seams?
    Answer

    So water cannot run straight through a joint.

8. Flashing and penetrations

  • Step flashing: one piece per course where roof meets wall; nail on the roof side only P.
  • Valleys: metal or shingle valley per the maker P.
  • Plumbing vent boots: top of flange under upper shingles, bottom over lower shingles P.
  • Self-adhering underlayment is often used at eaves, valleys and low-slope areas; ASTM D1970 mentioned (unverified) P. Unconfirmed
  • Seal nail heads and flange corners per the maker P.
  • Roof penetrations are the most common leak sources in practice P.

Go play with it Tool: Step flashing Tool: Valley flashing Tool: Plumbing vent flashing (boot) Tool: Roofing cement / sealant

Try it Install a mock step-flashing wall detail and inspect it.

Check yourself

  • Where to nail step flashing?
    Answer

    Roof leg only.

  • Which way does a pipe flange lap?
    Answer

    Under upper, over lower shingles.

  • What can seal nail heads?
    Answer

    Roofing sealant.

9. Installing asphalt shingles, step by step

  • 1 Confirm permit, layers, slope and deck. 2 Set fall protection. 3 Tear off or overlay (overlay rules not found: verify). 4 Fix the deck. 5 Underlayment. 6 Drip edge and flashing. 7 Starter and shingles. 8 Ridge, vents, clean-up, inspection S17P. Verify: 2006 IRC guide, not the 2025 CRCUnconfirmed
  • Nails: minimum 4 per strip shingle; 12 gauge, 3/8 in head, 3/4 in into sheathing (IRC 2006 basis; high-wind and maker rules may require more) S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Starter strip at the eave, then courses on chalk lines P.
  • Check nail count on random shingles daily P.
  • Walk the roof for exposed nails at the end P.
  • Use calculators: shingle-bundles, nail-count.

Go play with it Math: Shingle bundles Math: Shingle nail count Tool: Pneumatic coil nailer Tool: Roofing nails (galvanized) Tool: Starter strip Tool: Ridge cap shingles Tool: Chalk line reel

Try it Nail one mock course: 4 nails per shingle, in the nail zone, driven flush.

Check yourself

  • Minimum nails per strip shingle?
    Answer

    Four.

  • When to snap chalk lines?
    Answer

    Before laying each set of courses.

  • Final check?
    Answer

    Exposed nails, ridge, cleanup, inspection.

10. Tile roofs: weight, fall risk, dust

  • OSHA's tile factsheet: extend ladders at least 3 ft above the roof; carry materials on the down-slope side; keep loose tile and tools off walkways S12.
  • Pump-jack platforms need guardrails S12.
  • Cut tile with a water-fed saw; manage slurry and dust S9S11.
  • Roof structure must support the weight (verify the load) P. Verify
  • Tile in the Montecito fire zone must still be a Class A assembly; do not assume S8.

Go play with it Math: Ladder length and setback Tool: Concrete / clay roof tile Tool: Pump-jack scaffold Tool: Walk-behind saw with integrated water feed

Try it List the controls for cutting 20 tiles outdoors with a wet saw.

Check yourself

  • Ladder extension above the edge?
    Answer

    At least 3 ft.

  • Which dust control?
    Answer

    Water feed plus HEPA or washdown.

  • Walk on tile like shingle?
    Answer

    No; tiles break and cause falls.

11. Low-slope single-ply (TPO/PVC) welding and testing

  • Automatic welder: warm up 5-10 min, set heat and speed per the maker, test-weld first S13S14.
  • Fused seam width at least 1 in (SPRI); Carlisle target 1.5 in S13S14.
  • Overlap: 2 in for adhered or ballasted, 5 in for mechanically fastened S13.
  • Test weld: 10-15 ft of membrane, cut a 1 in strip across the seam, cool about 10 min, peel S13S14.
  • Probe every seam after 30 min cooling; mark voids with a water-soluble marker; re-probe after repair S14.
  • Generator at least 7,500 W, 240 V, 30 A; cord #10 gauge max 100 ft S13.
  • Heat settings: not found; follow the membrane maker S13. Unconfirmed

Go play with it Math: Single-ply membrane strips and seam length Tool: Automatic hot-air welder Tool: Hand-held hot-air welder Tool: Seam probe Tool: Welder generator Tool: Test-weld sample Tool: Hand seam roller

Try it Make and peel a test weld; probe a 10-ft seam; log results.

Check yourself

  • Minimum fused width?
    Answer

    1 in (SPRI); Carlisle targets 1.5 in.

  • Wait before probing?
    Answer

    At least 30 min.

  • Overlap on mechanically fastened systems?
    Answer

    5 in.

12. Take-off and ordering

  • Order squares = ceil(area x (1 + waste) / 100) G.
  • Bundles = ceil(squares x (1 + waste)) x bundles per square (3 is common; read the wrapper) GP.
  • Nail count = squares x shingles per square x nails per shingle G.
  • Underlayment courses = ceil((slope length in - 2) / 34) on steeper slopes (the first sheet covers 36 in, each added sheet 34 in) S17G. Verify: 2006 IRC guide, not the 2025 CRC
  • Drip edge: count linear feet and add laps (the first stick is full length, each added stick adds its length minus the lap) G.
  • Reroof trigger in Montecito: more than 10 percent of total roof area means a whole-roof Class A replacement S8.

Worked example G

1,500 sq ft plan at 6:12: true area 1,500 x 1.118 = 1,677 sq ft. With 12 percent waste (a placeholder, Verify) that is 1,677 x 1.12 / 100 = 18.8, ordered as 19 squares. At 3 bundles per square (read the wrapper) that is 57 bundles. A 360 in slope length takes ceil((360 - 2) / 34) = 11 underlayment courses (the first sheet covers 36 in, each added sheet 34 in). A 2,400 sq ft area with 12 percent waste is 26.9, ordered as 27 squares; 24 squares with 12 percent waste is 26.88, rounded to 27, times 3 = 81 bundles.

Go play with it Math: Roof squares and waste Math: Shingle bundles Math: Shingle nail count Math: Underlayment courses, 4:12 and steeper Math: Drip edge sticks Math: Material budget (placeholder prices) Math: Montecito 10% reroof trigger

Try it Take off a sample roof plan using the calculators and compare with a classmate.

Check yourself

  • 24 squares with 12% waste → bundles at 3 per square?
    Answer

    81.

  • Why add lap to drip-edge count?
    Answer

    Joints overlap.

  • 10% rule applies where?
    Answer

    Montecito (MFPD).

13. Codes, licensing and permits

  • 2025 California Residential Code (Title 24 Part 2.5) takes effect 1 Jan 2026; Chapter 9 covers roof assemblies with section titles R901 to R909 including R908 Reroofing (requirement text not read) S3. Confirm with building officialUnconfirmed
  • R902 fire classification and R905 roof coverings exist in Chapter 9; text not read: verify before quoting S3. Confirm with building officialUnconfirmed
  • CSLB C-39 Roofing Contractor covers installing and repairing roofing and waterproofing products and preparing the surface S1.
  • Whether a Class B general contractor may do roofing as part of a larger job: not researched; verify with CSLB. Unconfirmed
  • Typical inspection sequence is not confirmed; ask the permitting office P. Unconfirmed
  • Under-100-sq-ft repairs in 12 months are exempt from building permit per a secondary source: verify with the County S7. Confirm with building official
Try it List the documents you need on site: permit, Class A listing, MFPD Fire Protection Certificate.

Check yourself

  • Which license class covers roofing?
    Answer

    C-39 (CSLB).

  • Does a patch of 50 sq ft need a permit?
    Answer

    Per a secondary source, repairs under 100 sq ft per 12 months are exempt; verify. Verify

  • What code edition for permits filed after 1 Jan 2026?
    Answer

    The 2025 California codes; County adoption dates may differ.

14. Fire class and wildfire (WUI) basics

  • Roof coverings are rated Class A, B or C; Class A is highest S15.
  • Class A is required in fire hazard and WUI zones; do not assume every tile or shingle is Class A S15S8.
  • Montecito: Class A for new and replacement roofs; no wood shake or shingle S8.
  • Defensible space: Zone 0 is 0-5 ft from the building; Zone 1 is 5-30 ft; Zone 2 is 30-100 ft S5.
  • Keep roofs and gutters clear of leaves, needles and plant debris (MFPD Standard 2) S5.
  • Ember-resistant vents and roof-to-wall details: UNCONFIRMED in the sources opened; check the MFPD roofing standard and CBC Chapter 7A S5. Unconfirmed

Go play with it Math: Montecito 10% reroof trigger Tool: Class A roof assembly Tool: Ember-resistant roof vent

Try it Walk a mock property and sketch Zones 0, 1, 2 with distances.

Check yourself

  • Zone 0 distance?
    Answer

    0-5 ft.

  • Is wood shake allowed in Montecito?
    Answer

    No.

  • Which roof class is highest?
    Answer

    Class A.

15. Montecito and Santa Barbara: who rules what

  • Montecito is unincorporated County of Santa Barbara; the City of Santa Barbara is a separate jurisdiction S7P.
  • MFPD reviews roofing plans and contracts through the Fire Protection Certificate (FPC) process; the County Building Official inspects the installation S8.
  • MFPD: Class A required; wood shake/shingle banned; more than 10% replaced triggers whole-roof Class A S8.
  • County Fire is adopting the 2025 California Fire Code with local amendments; projected effective 1 Jan 2026; verify final adoption S6. Confirm with building official
  • The County Board of Supervisors acted on the ordinance amending County Code Chapter 10 to adopt the 2025 California Building Standards Codes with local amendments (Board action 4 Nov 2025; second reading 18 Nov 2025) S24. Effective date, ordinance number and the text of the local amendments were not read; the State edition takes effect 1 Jan 2026 S21. Confirm with building official
  • The County Fire ordinance (Chapter 15) is written to exclude the Montecito Fire District, so inside Montecito the District's own standards govern fire items S27. Verify final adoption
  • City of Santa Barbara (different jurisdiction): 2025 codes take effect 2 Jan 2026; the last day to submit a permit under the 2022 codes was 17 Dec 2025 S25. City reroofs that keep the same color, material and type can use an OnDemand permit (1 and 2 family homes, licensed contractor); a different material, color or type goes to an Express permit, typically issued within 5 business days of acceptance S26.
  • Montecito Board of Architectural Review: the County BAR packet lists projects in the Montecito, Summerland or Gaviota plan areas as subject to BAR review and a separate Montecito BAR meets every other Thursday at 123 East Anapamu St; the packet does not say whether a reroof needs BAR review S29. Unconfirmed: ask County planning before changing roof material or color
  • Coastal zone, hillside/grading/debris-flow, stormwater, noise and work hours for reroofs: not found. Unconfirmed
  • Phone numbers read on official pages: Montecito Fire Protection District main line (805) 969-7762 S28; City of Santa Barbara Building and Safety counter (805) 564-5485 x4371 S26. No County Building and Safety phone number was found S19. Unconfirmed (County)

The full rule table, contacts and a before-you-quote checklist are in Local rules below.

Go play with it Math: Montecito 10% reroof trigger

Try it Draw a flow: owner → contractor → MFPD FPC → County permit → inspections.

Check yourself

  • Who issues Class A review in Montecito?
    Answer

    Montecito Fire Protection District.

  • Who inspects the installation?
    Answer

    County Building Official.

  • Is the City's process the same?
    Answer

    Not confirmed; verify with the City. Unconfirmed

16. Quality checks and the costly failures

  • Quality checks: chalk lines, nail count, underlayment laps, drip edge overlap, exposed nails P.
  • Failure 1: shingles under 2:12 S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Failure 2: too few nails S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Failure 3: wrong nails S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Failure 4: missing or thin drip edge S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Failure 5: wrong underlayment laps S17. Verify: 2006 IRC guide, not the 2025 CRC
  • Failure 6: covering a bad deck P.
  • Failure 7: falls at the edge S4.
  • Failure 8: wrong fire class or vents in a fire zone S8.

Go play with it Tool: Magnetic nail sweeper Tool: Chalk line reel

Try it Inspect a mock roof section and list five defects with the fix for each.

Check yourself

  • Top safety failure?
    Answer

    Falls at the edge.

  • How do you catch under-nailing?
    Answer

    Daily nail-count checks on random shingles.

  • What do you check before ordering?
    Answer

    Slope, fire class and vent count.

17. Master topics: estimating, documentation and supervision

  • A master verifies code and local rules from primary sources before quoting, not from memory P.
  • Keep records: permit, Class A listing, FPC, photos of deck, underlayment, flashing and seams P.
  • On single-ply roofs keep test-weld and probe logs daily S14.
  • Choose tear-off vs overlay by layers, rot and code limits; overlay rules not found: verify P. Unconfirmed
  • Train the crew with the fall-trigger and ladder calculators each week P.
  • Know the open items in this research: County code edition, ember-vent rules, permit fees, Montecito BAR, coastal and hillside rules S5S19.

Go play with it Math: Material budget (placeholder prices) Math: Fall protection trigger (Cal/OSHA residential roofing) Math: Ladder length and setback

Try it Write a one-page job-start checklist covering permits, fire class, fall plan, deck check and order.

Check yourself

  • Why keep weld logs?
    Answer

    Evidence of test welds and probe results.

  • Before quoting a Montecito reroof you check?
    Answer

    MFPD roofing standard and County permit rules.

  • Which items are still unverified?
    Answer

    County code edition, ember-vent rules, fees, BAR and coastal rules.

18. Local rules table: Montecito and the City of Santa Barbara

Montecito is unincorporated County of Santa Barbara land. The City of Santa Barbara is a separate jurisdiction S7. Always confirm which one the address is in.

RuleApplies toTagStatus as researched, and source
New or replacement roofing must be Class AMontecito (MFPD)SCONFIRMED (2022 Std 1 opened; 2025 Dev Standards cited by worker) S8 S5
Wood shake and wood shingle prohibited, even if Class A assemblyMontecito (MFPD)SCONFIRMED S8
Replacing/adding more than 10% of total roof area requires whole roof Class AMontecito (MFPD)SCONFIRMED S8
MFPD reviews plans and contracts; roofing goes through the Fire Protection Certificate (FPC) application; contractor/agent provides Class A documentation; County Building Official inspects the installationMontecito (MFPD + County)SCONFIRMED S8
Rooftop gardens: case by case with District Fire Code Official approval; succulents only; CFC 317, CBC 1505.0, 1507.16, 705A citedMontecito (MFPD)SCONFIRMED S8
Keep roof and gutters clear of leaves, needles, plant debrisMontecito (MFPD Standard 2)SCONFIRMED (worker read) S5
Defensible space Zone 0 = 0-5 ft, Zone 1 = 5-30 ft, Zone 2 = 30-100 ftMontecito (MFPD)SCONFIRMED (worker read) S5
Zone 0 rules: new construction from 1 Jan 2026; existing three years later; State Zone 0 rules still being writtenMontecito (MFPD); StateVerifyCONFIRMED as the District states it; verify vs State rule S5
California WUI Code 2025 edition with Ordinance 2025-02MontecitoSCONFIRMED that the standard states it; ordinance not opened S5
2025 California Fire Code with local amendments replacing the 2022 edition; projected effective 2026-01-01; first reading 2025-11-18County FireVerifyCONFIRMED as projected; final adoption VERIFY S6
County Fire Code ordinance scope excludes the Carpinteria/Summerland and Montecito fire districts (draft text)County FireVerifyCONFIRMED in the draft ordinance; final text VERIFY S27
MFPD roofing standard names no code edition ("current version of the Code"); sections CFC 317, CBC 1505.0, 1507.16, 705AMontecitoVerifyCONFIRMED text; edition UNCONFIRMED S8
Roof repair under 100 sq ft in any 12 months exempt from building permitCounty and City (per guide)VerifyCONFIRMED only in a secondary source; VERIFY with County/City S7 (the City permit page S26 neither confirms nor contradicts it)
CRC 2025 R908.3: roof replacement removes existing layers down to the deck; R908.4: no roof recover over two or more applications of any roof covering, or over water-soaked or deteriorated roofsStateVerifyCONFIRMED in a secondary viewer S20
CRC 2025 R902.1.2: where more than 50 percent of total roof area is replaced in one year, at least a Class C roof covering; R902.1.1: structures in fire hazard severity zones or WUI also follow Part 7 (California WUI Code)StateVerifyCONFIRMED in a secondary viewer; Montecito 10 percent / Class A rule is stricter S22
County Code Chapter 10 ordinance adopting the 2025 California Building Standards Codes with local amendmentsCountyVerifyCONFIRMED that the Board acted 4 Nov 2025 and 18 Nov 2025 (second reading); effective date, ordinance number and amendment text NOT read S24
CRC 2025 effective 1 Jan 2026 (state level)StateVerifyCONFIRMED (secondary viewer) S3
Chapter 7A / R337: page cites 2022 editions and says local amendments applyCounty and CityVerifyCONFIRMED that page says so; current edition UNCONFIRMED S7
Ember-resistant vents, roof-to-wall edge details (Montecito standards)MontecitoUnconfirmedUNCONFIRMED: not in the standards opened none
Attic vent openings must resist embers and flame per Part 7 (California WUI Code); base net free vent area 1/150 of the vented space, 1/300 only if both conditions are metState (CRC 2025 R806)VerifyCONFIRMED in a secondary viewer; confirm in the adopted code S23
County Building & Safety page: enforces building, grading, electrical, plumbing, mechanical codes; no reroof rules or phone numbers on itCountySCONFIRMED (page opened) S19
City of Santa Barbara 2025 codes: effective 2 Jan 2026; last day to submit under 2022 codes 17 Dec 2025CitySCONFIRMED S25
City of Santa Barbara reroof permits: OnDemand for same color, material and type (1 and 2 family, licensed contractor); Express (about 5 business days) for a different material, color or typeCitySCONFIRMED S26
City of Santa Barbara fire-zone roof class and reroof fee amountsCityUnconfirmedNOT FOUND: the permit page gives no dollar amounts and does not mention fire zones S26
Montecito Board of Architectural Review: projects in the Montecito plan area are listed as subject to BAR review; separate Montecito BAR meets every other Thursday at 123 East Anapamu St; findings cite Montecito Land Use and Development Code Sec. 35.472.070MontecitoUnconfirmedCONFIRMED text of the packet; whether a reroof needs BAR review is NOT stated S29
Coastal zone, hillside/grading/debris-flow, stormwater for reroofsCounty / CityUnconfirmedNOT FOUND none
Noise and work-hour limitsCounty / CityUnconfirmedNOT FOUND none
Permit fees, inspection schedulingCounty / CityUnconfirmedNOT FOUND none
Cal/OSHA fall protection for residential roofing: 6 ft up to 7:12; any height above 7:12State (applies everywhere)SCONFIRMED S4

Contacts that were verified from pages opened

  • Montecito Fire Protection District: montecitofire.com; 595 San Ysidro Rd, Santa Barbara CA 93108; telephone (805) 969-7762 as printed on its About Us page. S5 S28 The page lists no fire prevention or plan review line.
  • County Fire Marshal and Division Chief: Fred Tan (name and title only; no phone confirmed). S6
  • County Building and Safety: countyofsb.org/522/Building-Safety-Division. The page lists no reroof rules and no phone. S19
  • City of Santa Barbara Building and Safety counter: (805) 564-5485 x4371, CDBuildingCode@SantaBarbaraCA.gov, as printed on its permit page; City Hall (805) 963-0611. S26
  • No County Building and Safety phone number was found. Use the official directory. Unconfirmed

Before you quote a Montecito or Santa Barbara reroof

  1. Confirm whether the address is in the County (Montecito) or the City.
  2. Ask Montecito Fire for the current roofing standard and Fire Protection Certificate process.
  3. Ask the County (or City) which code edition and amendments apply and whether a permit is needed.
  4. Check the Cal/OSHA fall protection plan, ladders and anchors for the slope.

19. Conflicts and open items

Where the sources disagreed

  • Fall trigger. One worker note used a flat federal 6 ft rule for every slope S16. Cal/OSHA 1731 adds "any height above 7:12" S4. This guide uses S4. A trade-group page says the residential trigger fell to 6 ft in 2025, but only a search snippet was read S18 Unconfirmed. Round 2: the current text of section 1731 (read again) sets 6 ft for slopes 0:12 to 7:12 and any height above 7:12, and its history shows an amendment operative 1 July 2025 S4; the page does not say what the amendment changed.
  • Low-slope underlayment edge. One note wrote "4:12 or less needs double underlayment" and another "2:12 to 4:12". The IRC wording is slopes from 2:12 up to below 4:12. Contested Verify Round 2: the CRC 2025 viewer shows R905.2.2 shingles only on 2:12 or steeper, and Table R905.1.1(2) two layers for 2:12 up to under 4:12 (overlap half a sheet width plus 2 in), one layer at 4:12 or greater S21. The 19 in figure was not on that page.
  • Roof class when more than 50 percent is replaced. A summary line about at least Class C was not checked against the adopted code S15 Contested Unconfirmed. In Montecito the stricter MFPD rule above applies.
  • County Fire Code. The 2025 California Fire Code with local amendments is projected for 1 January 2026; final adoption was not confirmed S6 Contested Unconfirmed

Rules that come from the 2006 guide Verify

  • Asphalt shingles on slopes of 2:12 or steeper; double underlayment on low slope; 2 in lap on steeper slopes, 19 in starter strip on low slope.
  • Four nails minimum per strip shingle; 12 gauge, 3/8 in head, 3/4 in into the sheathing; drip edge at least 0.019 in thick. S17
  • High-wind areas and the shingle maker may require more. Round 2: the CRC 2025 viewer text agrees with the 2:12 slope floor, 3/4 in into sheathing, at least four fasteners per strip shingle (two per individual shingle) and a drip edge at eaves and rakes fastened at not more than 12 in o.c.; the page shows no California amendment on these lines, so confirm in the official CBSC publication S21 Confirm with building official The 12 gauge, 3/8 in head and 0.019 in drip-edge thickness figures were not on that page and stay from S17. S3

Not found in any source opened Unconfirmed

  • Effective date, ordinance number and amendment text of the County Chapter 10 ordinance (the Board action itself is confirmed, S24); City of Santa Barbara fire-zone roof class and fee amounts.
  • Montecito ember-resistant vent and roof-to-wall edge rules (CRC 2025 R806 sends vent openings to Part 7, S23, but the Montecito standards were not found to add detail). Attic ventilation ratio and reroof layer limits are now sourced to the CRC 2025 viewer (S23, S20).
  • Permit fee amounts and inspection scheduling; whether a Montecito reroof needs BAR review (packet is silent, S29); coastal, hillside, grading and stormwater rules; noise and work-hour limits.
  • Whether concrete tile, sheet metal, gutters, decking or structural repair fall under CSLB C-39, and whether a Class B general contractor may roof inside a larger job. Ask CSLB.
  • The 4 to 1 ladder setback ratio. ASTM standard numbers (D3161, D7158, D3462, D226, D1970, C1167, D6878, D4434) and SPRI/NRCA references are general knowledge only.
  • Hip and valley true-length factors, ridge-cap coverage and vent counts are not covered by the calculators.

Sources

Accessed 2 November 2026. [S17] is an outdated edition and [S18] was never read beyond a search snippet. Round 2 (3 Nov 2026) added S20 to S29. Opened in round 2 but with nothing usable on roofing: County permitting home. Not opened: ICC IRC R806 page, the CalChamber page (it redirected).

Not engineering or legal advice. Questions or fixes: purchasing@amnbuild.com.