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2015 IRC Section 312.2.1

Discussion in 'Residential Building Codes' started by KZQuixote, Jun 13, 2019.

  1. KZQuixote

    KZQuixote Sawhorse

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    This section says "the top of the sill". I believe this to mean the bottom of the opening but I'm having a hard time convincing an inspector that it doesn't mean the top of the stool (interior trim). Do any of you have a supportable opinion?
    Thanks
    Bill
     
  2. Rick18071

    Rick18071 Sawhorse

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  3. KZQuixote

    KZQuixote Sawhorse

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    Thanks Rick,
    I'm pretty sure that whomever composed the language for Sec 312.2.1 didn't intend an inspector to have to measure over an inside stool to find the height of the top of the sloping sill. Additionally, not all window types have a sloping sill at all.
    I don't have a commentary to review, wish I did.
    Bill
     
  4. fatboy

    fatboy Administrator

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    There were several proposal at the Committee Action Hearings in April that will clean up the language, less confusing.
     
  5. Rick18071

    Rick18071 Sawhorse

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    But the code does not say window sill, it just says sill.
    sill
    /sil/
    Learn to pronounce
    noun
    1. a shelf or slab of stone, wood, or metal at the foot of a window or doorway.
      • a strong horizontal member at the base of any structure, e.g., in the frame of a motor or rail vehicle.
      • GEOLOGY
        a tabular sheet of igneous rock intruded between and parallel with the existing strata.
     
  6. Paul Sweet

    Paul Sweet Sawhorse

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    Few people outside the construction industry know the difference between a sill and stool. They think a stool is something you sit or stand on, or something you pass.
     
  7. Rick18071

    Rick18071 Sawhorse

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    Looks like the code is worrying about the height of the "sill" rather than the window opening. So if the sill is to low just put it above the window or just have drywall and don't put a sill in.
     

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