Minimum Roof Insulation R Value Ibc 2009

The second r value applies when more than half the insulation is on the interior of the mass wall.

Minimum roof insulation r value ibc 2009.

Minimum insulation r value requirements non residential above roof deck. R 38 in climate minimum thermal insulation requirements. For impact rated fenestration complying with section r301 2 1 2 of the irc or section 1608 1 2 of the ibc maximum u factor shall be 0 75 in zone 2 and 0 65 in zone 3. R 5 shall be added to the required slab edge r values for heated slabs.

Insulation depth shall be the depth of the footing or 2 feet whichever is less in zones 1. Tion 1508 roof insulation contains requirements for roof insulation. For a very good introductory overview article on r value see r values over at the website of. Aluminum or copper roofing nails minimum 12 gage 0 105 inch 2 67 mm shank with a minimum 3 8 inch diameter 9 5 mm.

Roofs insulation entirely above deck r 15ci r 20ci r 20ci r 20ci r 20ci r 20ci r 20ci r. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. Using ibc 2012 copper sheet roofing minimum 16 ounce over combustible roof deck can be considered class a without testing. Ibc 2009 uses the term roof covering to refer to a par ticular type of roofing product or system.

State only ma massachusetts 780 cmr chapter 13 5 r 30 state only mi michigan ashrae 90 1 2007 5 r 20 6 r 20 7 r 20 state only mn minnesota minnesota commercial state building code 6 r 30 7 r 35 please see disclaimer on back page. The covering applied to the roof deck for weather resistance fire classification or appearance. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. Previously ibc 2009 required copper sheet roof systems to be fire tested.

Minimum insulation r value requirements by state. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. The term is defined in section 1502 definitions as.

International building code 2009 ibc 2009. Specific insulation requirements of section c402 2 thermal requirements of either. 13 5 means r 13 cavity insulation plus r 5 insulated sheathing. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

Non residential above roof deck this matrix provides the minimum insulation r values required by local and state municipalities.