Oklahoma Roof Insulation Requirements

Sheet metal and air conditioning contractor s national association smacna 5.

Oklahoma roof insulation requirements.

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. Existing buildings requirements are sprinkled throughout the i codes. Insulation is rated in terms of thermal resistance called r value which indicates the resistance to heat flow. The r value of thermal insulation depends on the type of material its thickness and its density.

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. Insulation ratings are measured in r values per inch of thickness. Another major performance issue with insulation and energy savings is its air sealing capability.

Adopted building codes. The higher the r value the better the insulation. Insulation level are specified by r value. Sheet metal and air conditioning contractor s national association smacna 5.

The us department of energy estimates that up to 40 or more of your home s energy loss is due to air leakage. Effective date of adoption. For roofing replacements it is necessary to look at the ibc. Insulation r values vary based on the type thickness and density of the insulation material.

Minimum insulation r value requirements non residential above roof deck. Injection foam insulation stops air leakage. All recommendations of the national roofing contractors association nrca 4. An r value tells you how well a type of insulation can keep heat from leaving or entering your home.

All requirements of the state of oklahoma roofing program and the state of oklahoma roof warranty roofing system manufacturer s warranty rsmw 6. Injection foam insulation s higher r value. All recommendations of the national roofing contractor s association nrca 4. International residential code 2015 edition irc 2015.

R value is a measure of insulation s ability to resist heat traveling through it. The higher the r value the better the thermal performance of the insulation. The information contained in this document is meant to be used as a quick reference guide for insulation levels across the united states. State applicable energy ashrae zone minimum r value state.

Insulation r value requirements for usa. The higher the r value the greater the insulating effectiveness. Modifications to the code.