Bath

BATH ROUGHS

Frame

  • A valid permit and plans must be on-site R106.3.1
  • Notching/Boring: (see framing) R602.6
  • Nail plates:
    • Plastic/copper pipes___1″ CPC 312.9
    • NM (Romex)__________1.25” CEC 300.4
    • PEX_________________2″ MI
  • Shower: ≥ 30″ x 30” and ≥ 1,024 sq in CPC 408.6
  • Concrete backer boards: corrosion-resistant fasteners required R702.4.2 and MI
  • Wet wall: (vapor barrier) 6’ above the floor R408.6 and R307.2
  • Min requirement for solid surface shower walls: purple s/r, vapor barrier not required
  • Tempered glazing: ≤ 5’ from the shower (horizontal) and ≤ 5’ from the drain (vertical) (see windows) R308.4.5. Aftermarket film is not a substitute for tempered glazing. For like-for-like shower remodels, the existing (legal at the time of installation) non-safety glazing can remain
  • Plate penetrations: R302.4.1.2 and R302.11
  • Fire blocking (combustible construction): provided to cut off vertical and horizontal concealed draft openings and to form a fire barrier between stories and the roof space (at plates) (see framing) R302.11
  • Draft stops: 10’ horizontal R302.12

Plumbing

  • Plumbing systems shall be installed in a workman-like manner CPC 309.4
  • Pipes strapped: plumbing CPC 313
  • Testing: DWV CPC 712.2 – supply CPC 609.4  
  • Vent termination: ≥ 6” above the roof, ≥ 1’ above the vertical surface. Each vent shall terminate > 10′ from, or > 3′ above, an openable window, door, opening, air intake, or vent shaft, and not less than 3′ in every direction from a lot line, alley, and street CPC 906.1-7
  • ABS exposed to sunlight shall be protected with latex paint and terminate into an approved flashing
  • Thermo mixing/pressure balance valve: CPC 408.3
  • The shower valve must be accessible without entering the stream CPC 408.9
  • Shower curb: 2-9” CPC 408.5 
    • Curbless shower: liner extends > 2’ into the bathroom. BO
  • Shower liner: 3” above the curb, 1/4” – 1/2” slope per foot CPC 408.7
  • Liner penetrations: > 1” above the finished curb CPC 408.7
  • Liner test: Fill to the rough threshold – 15 min – verify that weep holes are operational. Pre-fab pans exempt (tested by mfg) CPC 408.7.5
  • Concealed slip joints: 12” x 12” access panel CPC 402.10
  • Hot mop: 3 layers 15 lb. with 4″ laps CPC 408.7
  • WC clearances: 15″/30″/24” CPC 402.5
  • Insulation: ALL hot wall lines must be insulated CPC 609.12
  • Shower steam unit: must have RP – pan – pan must drain to approved location (ok to drain back to shower receptor). The shower lid must slope 2″/ft.
  • A 1.5” shower waste can remain. Replace the fouling chamber with 2”. 1.5” trap to remain. BO

Electrical and Mechanical

  • All work done in a neat, workman-like manner CEC 110.12
  • Design, construction, and workmanship shall comply with accepted engineering practices and shall be of such character as to secure the results sought to be obtained by this code CMC 309.0-3
  • Conductor staples: every 4.5’ and 12” from the box CEC 334.30. 8” from single gang plastic box CEC 314.17
  • Metal boxes must be grounded CEC 250.148.C
  • Jacuzzi: bond motor #8 AWG, GFCI receptacle accessible (see electrical) CEC 680.74 & 680.71
  • The panel must be labeled CEC 110.22.A
  • Bath lights: All HE CEC 150.K.1.A
  • Class 2 wire required for low voltage lighting CEC 725.121
  • Recessed down-lights: IC – AT – gasketed CEC 150.K.1.C.1-6
  • If a wall is opened ≤ 3’ from the bathroom sink or the conductors are modified then an electrical upgrade to the current code is required. An upgrade is not required to replace a like-for-like fan or light. BO
  • Vacancy sensor: 1 VS is required per bathroom CEC 150.K.2.J
  • Humidistat: a humidistat must control the fan (see photos) CGBC 4.506.1.2.A
  • The fan and light must be switched separately CEC 150.K.2.B
  • A fan is not required with a remodel unless a fixture is added. BO
  • Fan termination: 3’ from an opening and the property line CMC 502.2.1
  • Receptacle requirements: one 20 amp circuit for all bath receptacles only or one 20 amp circuit per bath if the receptacles and lights are on the same circuit CEC 210.11.C.3

BATH FINAL

Frame

Plumbing

  • WC: 15/30/24” CPC 402.5
  • Fixtures must be caulked to the wall/floor CPC 402.2
  • Angle Stops: CPC 606.5
  • P-Trap: CPC 1001.2 
  • Fixture clearances: (WC, Lavi, Bidet): 24” CPC 402.5
  • Handheld shower: Anti-Syphon device required CPC 417.3
  • Shower floor slope: 1/8″-1/2″ CPC 408.5
  • The shower lid must slope 2″/ft with a steam unit

Flow Rates

WC __________________1.28 ____CPC 411.2

Faucet _______________1.2 _____CPC 407.2.1.2

Shower Head _________1.8 _____CPC 408.2

Commercial Faucet____ 0.5 ____CPC 407.2.1

Metering Faucet _______0.2 ____CPC 407.2.2.1

Electrical and Mechanical

  • Bath lights: All HE CEC 150.K.1.A
  • AFCI: No requirements CEC 210.12
  • The panel must be labeled CEC 110.22.A
  • Vacancy sensor: 1 VS is required per bathroom CEC 150.K.2.J
  • Humidistat: a humidistat must control the fan (see photos) CGBC 4.506.1.2.A
  • The fan and light must be switched separately CEC 150.K.2.B
  • A fan is not required with a remodel unless a fixture is added. BO
  • Fan termination: 3’ from an opening and the property line CMC 502.2.1
  • Receptacle requirements: one 20 amp circuit for all bath receptacles only or one 20 amp circuit per bath if the receptacles and lights are on the same circuit CEC 21