Minimum Roof Insulation R Value Ibc 2009

You should of course see the manufacturer provided technical data sheet for the r value of specific products.

Minimum roof insulation r value ibc 2009.

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 second r value applies when more than half the insulation is on the interior of the mass wall. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. 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.

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. Minimum insulation r value requirements non residential above roof deck. 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. The minimum ceiling insulation r values shall be r 19 in zones 1 through 4 and r 24 in zones 5 though 8.

R value of various materials. The covering applied to the roof deck for weather resistance fire classification or appearance. The minimum wall r value shall be r 13 in all zones. Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails.

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. New wall s separating the sunroom from conditioned space shall meet the building thermal envelope requirements. Similar increases were approved for walls. Tion 1508 roof insulation contains requirements for roof insulation.

The increased roof and wall insulation values apply to all commercial and high rise residential buildings covered by standard 90 1. The term is defined in section 1502 definitions as. Ibc 2009 uses the term roof covering to refer to a par ticular type of roofing product or system. For a very good introductory overview article on r value see r values over at the website of.

Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. 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 value based method of section c402 1 3 u c and f factor based method of section c402 1 4.