Oklahoma Roof Insulation Requirements

The us department of energy estimates that up to 40 or more of your home s energy loss is due to air leakage.

Oklahoma roof insulation requirements.

For roofing replacements it is necessary to look at the ibc. All recommendations of the national roofing contractor s association nrca 4. Roof replacements shall comply with section c402 1 3 c402 1 4 c402 1 5 or c407 where the existing roof assembly is part of the building thermal envelope and contains insulation entirely above the roof deck. Sheet metal and air conditioning contractor s national association smacna 5.

Existing buildings requirements are sprinkled throughout the i codes. International residential code 2015 edition irc 2015. An r value tells you how well a type of insulation can keep heat from leaving or entering your home. Injection foam insulation s higher r value.

Insulation level are specified by r value. Insulation r values vary based on the type thickness and density of the insulation material. All requirements of the state of oklahoma roofing program and the state of oklahoma roof warranty roofing system manufacturer s warranty rsmw 6. Effective date of adoption.

Insulation r value requirements for usa. R value is a measure of insulation s ability to resist heat traveling through it. All recommendations of the national roofing contractors association nrca 4. The higher the r value the better the insulation.

The higher the r value the greater the insulating effectiveness. Not less than a 1 air space shall be provided between the insulation and the roof sheathing. The table below shows what levels of insulation are cost effective for different climates and locations in the home. Oklahoma 2015 energy code compliance guide this is intended to guide the building industry to greater compliance with the prescriptive energy code requirements in chapter 11 of the 2015 irc as amended by the oubcc ok 2015 irc.

Insulation is rated in terms of thermal resistance called r value which indicates the resistance to heat flow. The higher the r value the better the thermal performance of the insulation. State applicable energy ashrae zone minimum r value state. Modifications to the code.

Another major performance issue with insulation and energy savings is its air sealing capability. Insulation ratings are measured in r values per inch of thickness. All requirements of the state of oklahoma roofing program and the state of oklahoma roof warranty roofing system manufacturer s warranty rsmw 6. The information contained in this document is meant to be used as a quick reference guide for insulation levels across the united states.

Sheet metal and air conditioning contractor s national association smacna 5. Adopted building codes. Ok oklahoma oklahoma uniform building code 3 r 15.