Minimum Roof Insulation R Value Ibc 2009

Fasteners for asphalt shingles shall be galvanized stainless steel 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 head of a length to penetrate through the roofing materials and a minimum of 3 4 inch 19 1 mm into the roof sheathing.

Minimum roof insulation r value ibc 2009. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. The second r value applies when more than half the insulation is on the interior of the mass wall. The above deck roof insulation requirements previously at r 15 increased by 33 to r 20 in every climate zone in the u s. The increased roof and wall insulation values apply to all commercial and high rise residential buildings covered by standard 90 1.

New wall s separating the sunroom from conditioned space shall meet the building thermal envelope requirements. For a very good introductory overview article on r value see r values over at the website of. Specific insulation requirements of section c402 2 thermal requirements of either. Tion 1508 roof insulation contains requirements for roof insulation.

R value of various materials. You should of course see the manufacturer provided technical data sheet for the r value of specific products. The term is defined in section 1502 definitions as. Table 402 1 1 insulation and fenestration requirements by componenta climate zone fenestration u factorb skylightb u factor glazed fenestration shgcb e ceiling r value wood frame wall r value mass wall r valuei floor r value.

Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails. The minimum wall r value shall be r 13 in all zones. Minimum insulation r value requirements non residential above roof deck. Similar increases were approved for walls.

A minimum of fifty percent of the lamps in permanently installed lighting fixtures shall be high efficiency lamps. 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. 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. Ibc 2009 uses the term roof covering to refer to a par ticular type of roofing product or system.

R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. The minimum ceiling insulation r values shall be r 19 in zones 1 through 4 and r 24 in zones 5 though 8. 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.