Minimum Roof Insulation R Value Ibc 2009

R value based method of section c402 1 3 u c and f factor based method of section c402 1 4.

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. 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 minimum ceiling insulation r values shall be r 19 in zones 1 through 4 and r 24 in zones 5 though 8. The increased roof and wall insulation values apply to all commercial and high rise residential buildings covered by standard 90 1.

Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. 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. Tion 1508 roof insulation contains requirements for roof insulation.

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

Where the roof sheathing is less than 3 4 inch 19 1 mm thick the nails. R value of various materials. Specific insulation requirements of section c402 2 thermal requirements of either. The minimum wall r value shall be r 13 in all zones.

The covering applied to the roof deck for weather resistance fire classification or appearance. 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. 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. Minimum insulation r value requirements non residential above roof deck.

A minimum of fifty percent of the lamps in permanently installed lighting fixtures shall be high efficiency lamps. You should of course see the manufacturer provided technical data sheet for the r value of specific products. New wall s separating the sunroom from conditioned space shall meet the building thermal envelope requirements.