Minimum Roof Insulation R Value Ibc 2009

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.

Minimum roof insulation r value ibc 2009.

The minimum wall r value shall be r 13 in all zones. The second r value applies when more than half the insulation is on the interior of the mass wall. The covering applied to the roof deck for weather resistance fire classification or appearance. Similar increases were approved for walls.

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. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. 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. Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. Tion 1508 roof insulation contains requirements for roof insulation. 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. New wall s separating the sunroom from conditioned space shall meet the building thermal envelope requirements.

A minimum of fifty percent of the lamps in permanently installed lighting fixtures shall be high efficiency lamps. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Specific insulation requirements of section c402 2 thermal requirements of either.

Ibc 2009 uses the term roof covering to refer to a par ticular type of roofing product or system. R value of various materials. 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 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 above deck roof insulation requirements previously at r 15 increased by 33 to r 20 in every climate zone in the u s. The term is defined in section 1502 definitions as. Minimum insulation r value requirements non residential above roof deck.