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.

New wall s separating the sunroom from conditioned space shall meet the building thermal envelope requirements. 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. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. 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. 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. Specific insulation requirements of section c402 2 thermal requirements of either. The second r value applies when more than half the insulation is on the interior of the mass wall.

The increased roof and wall insulation values apply to all commercial and high rise residential buildings covered by standard 90 1. You should of course see the manufacturer provided technical data sheet for the r value of specific products. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. The term is defined in section 1502 definitions as.

The above deck roof insulation requirements previously at r 15 increased by 33 to r 20 in every climate zone in the u s. Similar increases were approved for walls. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. 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.

The covering applied to the roof deck for weather resistance fire classification or appearance. A minimum of fifty percent of the lamps in permanently installed lighting fixtures shall be high efficiency lamps. Minimum insulation r value requirements non residential above roof deck. The minimum ceiling insulation r values shall be r 19 in zones 1 through 4 and r 24 in zones 5 though 8.

The minimum wall r value shall be r 13 in all zones. R value of various materials. Tion 1508 roof insulation contains requirements for roof insulation.