// CODE SNIPPET
402.2.2 Existing Ceiling/Roof Assemblies Without Attic Spaces (Includes Cathedral Ceilings)
JUMP TO FULL CODE CHAPTER
Where Section 402.1.1 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 402.1.1 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 402.1.3 and the total UA alternative in Section 402.1.4.
Related Code Sections
Section 1502 Roof Assemblies and Rooftop Structures, Definitions
or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, attics, cathedral ceilings or other enclosed spaces ...
717.4 Fire and Smoke Protection Features, Draftstopping in Attics
-resistance rating. Where laminated wood I-joist assemblies are used, the space between the ceiling and the floor or roof above shall be divided ...
NYC Building Code 2014 > 7 Fire and Smoke Protection Features > 717 Concealed Spaces > 717.4 Draftstopping in Attics
§27-327 Fire Protection Construction Requirements, Ceilings
(a) Ceilings that contribute to the required fire-resistance rating of a floor or roof assembly shall be continuous between exterior walls, vertical ...
NYC 1968 Code (Vol I) > 5 Fire Protection Construction Requirements > 3 Fire-Resistance Requirements > §27-327 Ceilings
709.4 Fire and Smoke Protection Features, Continuity
Fire partitions shall extend from the top of the foundation or floor/ceiling assembly below to the underside of the floor or roof sheathing, slab ...
NYC Building Code 2014 > 7 Fire and Smoke Protection Features > 709 Fire Partitions > 709.4 Continuity
Section 711 Fire-Resistance-Rated Construction, Horizontal Assemblies
Where the weight of lay-in ceiling panels, used as part of fire-resistance-rated floor/ceiling or roof/ceiling assemblies ...