• Codes
  • Features

    Features Overview

    Go to features
    Reference

    Reference.

    A reliable and up-to-date source of codes.
    Research

    Research.

    Rapidly and efficiently calculate project parameters.
    Collaboration

    Collaboration.

    Get everyone on the same page and streamline code research.
    Workflows
    Architects General Contractor Building Official & Plans Examiner Inspectors Owner Subcontractors Code Consultants
  • Pricing
  • Login
  • Sign Up
Sign Up
Login
  • Code Library
  • Features
  • Pricing
  • About
  • Careers
  • Help
  • Contact
  • Terms
  • Privacy
Sign Up
Upgrade to Premium
Code calculators: Code Calculators automatically generates a detailed list of requirements.
REFERENCE
Amendment Styling
Industry-leading search
Suggested code sections
Code diagrams
RESEARCH
Code calculators
Filter by topic
Code compare
Code sheet exports
COLLABORATION
Team projects
Bookmarks
Comments
START 2 WEEK FREE TRIAL
Have an account? Sign in
// CODE SNIPPET

1102.2 Specific Insulation Requirements

Ohio Residential Code 2013 > 11 Energy Efficiency > 1102 Building Thermal Envelope > 1102.2 Specific Insulation Requirements
JUMP TO FULL CODE CHAPTER

1102.2.1 Ceilings With Attic Spaces

When Section 1102.1 would require R-38 in the ceiling, R-30 shall be deemed to satisfy the requirement for R-38 wherever the full height of uncompressed R-30 insulation extends over the wall top plate at the eaves. Similarly R-38 shall be deemed to satisfy the requirement for R-49 wherever the full height of uncompressed R-38 insulation extends over the wall top plate at the eaves. This reduction shall not apply to the U -factor alternative approach in Section 1102.1.2 and the Total UA alternative in Section 1102.1.3.

1102.2.2 Ceilings Without Attic Spaces

Where Section 1102.1 would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space for the required insulation, the minimum required insulation for such roof/ceiling assemblies shall be R-30. This reduction of insulation from the requirements of Section 1102.1 shall be limited to 500 square feet (46 m2) or twenty per cent of the total insulated ceiling area, whichever is less . This reduction shall not apply to the U-factor alternative approach in Section 1102.1.2 and the Total UA alternative in Section 1102.1.3. .

1102.2.3 Access Hatches and Doors

Access doors from conditioned spaces to unconditioned spaces (e.g., attics and crawl spaces) shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces. Access shall be provided to all equipment which prevents damaging or compressing the insulation. A wood framed or equivalent baffle or retainer is required to be provided when loose fill insulation is installed, the purpose of which is to prevent the loose fill insulation from spilling into the living space when the attic access is opened and to provide a permanent means of maintaining the installed R -value of the loose fill insulation.

1102.2.4 Mass Walls

Mass walls, for the purposes of this chapter, shall be considered above-grade walls of concrete block, concrete, insulated concrete form (ICF), masonry cavity, brick (other than brick veneer), earth (adobe, compressed earth block, rammed earth) and solid timber/logs.

1102.2.5 Steel-Frame Ceilings, Walls and Floors

Steelframe ceilings, walls and floors shall meet the insulation requirements of Table 1102.2.5 or shall meet the U-factor requirements in Table 1102.1.2. The calculation of the U-factor for a steel-frame envelope assembly shall use a series-parallel path calculation method.

Exception: Deleted.

TABLE 1102.2.5
STEEL-FRAME CEILING, WALL AND FLOOR INSULATION (R-VALUE)

WOOD FRAME R-VALUE REQUIREMENTCOLD-FORMED STEEL EQUIVALENT R-VALUEa
Steel Truss Ceilingsa
R-30R-38 or R-30 + 3 or R-26 + 5
R-38R-49 or R-38 + 3
R-49R-38 + 5
Steel Joist Ceilingsb
R-30R-38 in 2 × 4 or 2 × 6 or 2 × 8
R-49 in any framing
R-38R-49 in 2 × 4 or 2 × 6 or 2 × 8 or 2 × 10
Steel Framed Wall
R-13R-13 + 5 or R15 + 4 or R-21 + 3 or R-0 + 10
R-19R-13 + 9 or R-19 + 8 or R-25 + 7
R-21R-13 + 10 or R-19 + 9 or R-25 + 8
Steel Joist Floor
R-13R-19 in 2 × 6
R-19 + R-6 in 2 × 8 or 2 × 10
R-19R-19 + R-6 in 2 × 6
R-19 + R-12 in 2 × 8 or 2 × 10
For SI: 1 inch = 25.4 mm.
  1. Cavity insulation R-value is listed first, followed by continuous insulation R-value.
  2. Insulation exceeding the height of the framing shall cover the framing.

1102.2.6 Floors

Floor insulation shall be installed to maintain permanent contact with the underside of the subfloor decking.

1102.2.7 Basement Walls

Exterior walls associated with conditioned basements shall be insulated from the top of the basement wall down to 10 feet (3048 mm) below grade or to the basement floor, whichever is less. Walls associated with unconditioned basements shall meet this requirement unless the floor overhead is insulated in accordance with Sections 1102.1 and 1102.2.6.

1102.2.8 Slab-On-Grade Floors

Slab-on-grade floors with a floor surface less than 12 inches below grade shall be insulated in accordance with Table 1102.1. The insulation shall extend downward from the top of the slab on the outside or inside of the foundation wall. Insulation located below grade shall be extended the distance provided in Table 1102.1 by any combination of vertical insulation, insulation extending under the slab or insulation extending out from the building. Insulation extending away from the building shall be protected by pavement or by a minimum of 10 inches (254 mm) of soil. The top edge of the insulation installed between the exterior wall and the edge of the interior slab shall be permitted to be cut at a 45-degree (0.79 rad) angle away from the exterior wall. Slab-edge insulation is not required in jurisdictions designated by the building official as having a very heavy termite infestation.

1102.2.9 Crawl Space Walls

As an alternative to insulating floors over crawl spaces, insulation of crawl space walls shall be permitted when the crawl space is not vented to the outside. Crawl space wall insulation shall be permanently fastened to the wall and extend downward from the floor to the finished grade level and then vertically and/or horizontally for at least an additional 24 inches (610 mm). Exposed earth in unvented crawl space foundations shall be covered with a continuous Class I vapor retarder. All joints of the vapor retarder shall overlap by 6 inches (152 mm)and be sealed or taped. The edges of the vapor retarder shall extend at least 6 inches (152 mm) up the stem wall and shall be attached to the stem wall.

1102.2.10 Masonry Veneer

Insulation shall not be required on the horizontal portion of the foundation that supports a masonry veneer.

1102.2.11 Thermally Isolated Sunroom Insulation

The minimum ceiling insulation R -values shall be R-19 in zones 1 through 4 and R-24 in zones 5 though 8. The minimum wall R -value shall be R-13 in all zones. New wall(s) separating the sunroom from conditioned space shall meet the building thermal envelope requirements.

Related Code Sections


1102.2 Energy Efficiency, Specific Insulation Requirements
of uncompressed R-30 insulation extends over the wall top plate at the eaves. Similarly R-38 shall be deemed to satisfy the requirement for R-49 wherever the full ...
Ohio Residential Code 2013 > 11 Energy Efficiency > 1102 Building Thermal Envelope > 1102.2 Specific Insulation Requirements
1105.2.2 Energy Efficiency, Specific Insulation Requirements
Where Section 1105.2.1 would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient ...
Ohio Residential Code 2013 > 11 Energy Efficiency > 1105 Ohio Home Builders Association (OHBA) Alternative Energy Code Option > 1105.2 Building Thermal Envelope > 1105.2.2 Specific Insulation Requirements
1102.2.9 Energy Efficiency, Crawl Space Walls
As an alternative to insulating floors over crawl spaces, insulation of crawl space walls shall be permitted when the crawl space is not vented ...
Ohio Residential Code 2013 > 11 Energy Efficiency > 1102 Building Thermal Envelope > 1102.2 Specific Insulation Requirements > 1102.2.9 Crawl Space Walls
1102.2.1 Energy Efficiency, Ceilings With Attic Spaces
of uncompressed R-30 insulation extends over the wall top plate at the eaves. Similarly R-38 shall be deemed to satisfy the requirement for R-49 wherever the full ...
Ohio Residential Code 2013 > 11 Energy Efficiency > 1102 Building Thermal Envelope > 1102.2 Specific Insulation Requirements > 1102.2.1 Ceilings With Attic Spaces
Help Contact Us Privacy Terms
Code Calculators
Code Calculators
Code calculators automatically generate a detailed list of requirements.
Code diagrams
Code diagrams
Unpack the code through illustrations and descriptions.
Code Compare
Code Compare
Highlight differences between any two building codes.
Shared projects
Shared projects
Projects provide a dedicated space to collaborate on code research.
Search
Search
Don't miss relevant code. Quickly locate sections across your jurisdiction.
Code sheet exports
Code sheet exports
Generate a code sheet that integrates with your drawing set.
UpCodes Premium
Leverage the most sophisticated code compliance platform.
TRY FREE FOR TWO WEEKS VISIT PRICING
UpCodes Premium
Leverage the full code compliance platform.
START 2 WEEK FREE TRIAL LEARN MORE