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// CODE SNIPPET

N1102.2.2 (R402.2.2) Ceilings Without Attic Spaces

2015 Virginia Residential Code > 11 [RE] Energy Efficiency > N1102 (R402) Building Thermal Envelope > N1102.2 (R402.2) Specific Insulation Requirements (Prescriptive) > N1102.2.2 (R402.2.2) Ceilings Without Attic Spaces
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Where Section N1102.1.2 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 N1102.1.2 shall be limited to 500 square feet (46 m2) or 20 percent of the total insulated ceiling area, whichever is less. This reduction shall not apply to the U-factor alternative approach in Section N1102.1.4 and the total UA alternative in Section N1102.1.5.

Related Code Sections


N1102.2.2 [RE] Energy Efficiency, (R402.2.2) Ceilings Without Attic Spaces
Where Section N1102.1.2 would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space ...
2015 Virginia Residential Code > 11 [RE] Energy Efficiency > N1102 (R402) Building Thermal Envelope > N1102.2 (R402.2) Specific Insulation Requirements (Prescriptive) > N1102.2.2 (R402.2.2) Ceilings Without Attic Spaces
N1102.2.2 [RE] Energy Efficiency, (R402.2.2) Ceilings Without Attic Spaces
Where Section N1102.1.1 would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space ...
2012 Virginia Residential Code > 11 [RE] Energy Efficiency > N1102 Building Thermal Envelope > N1102.2 (R402.2) Specific Insulation Requirements (Prescriptive) > N1102.2.2 (R402.2.2) Ceilings Without Attic Spaces
R402.2.2 [RE] Residential Energy Efficiency, Ceilings Without Attic Spaces
Where Section R402.1.2 would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space ...
2015 Virginia Energy Conservation Code > 4 [RE] Residential Energy Efficiency > R402 Building Thermal Envelope > R402.2 Specific Insulation Requirements (Prescriptive) > R402.2.2 Ceilings Without Attic Spaces
R402.2.2 [RE] Residential Energy Efficiency, Ceilings Without Attic Spaces
Where Section R402.1.1 would require insulation levels above R-30 and the design of the roof/ceiling assembly does not allow sufficient space ...
2012 Virginia Energy Conservation Code > 4 [RE] Residential Energy Efficiency > R402 Building Thermal Envelope > R402.2 Specific Insulation Requirements (Prescriptive) > R402.2.2 Ceilings Without Attic Spaces
1203.2 Interior Environment, Attic Spaces
Enclosed attics and enclosed rafter spaces formed where ceilings are applied directly to the underside of roof framing members shall have cross ...
2012 Virginia Construction Code (USBC, Part I) > 12 Interior Environment > 1203 Ventilation > 1203.2 Attic Spaces
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