Oklahoma Roof Insulation Requirements

Minimum insulation r value requirements non residential above roof deck.

Oklahoma roof insulation requirements.

The higher the r value the better the thermal performance of the insulation. All requirements of the state of oklahoma roofing program and the state of oklahoma roof warranty roofing system manufacturer s warranty rsmw 6. The r value of thermal insulation depends on the type of material its thickness and its density. Injection foam insulation s higher r value.

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. The information contained in this document is meant to be used as a quick reference guide for insulation levels across the united states. Insulation is rated in terms of thermal resistance called r value which indicates the resistance to heat flow. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

State applicable energy ashrae zone minimum r value state. Not less than a 1 air space shall be provided between the insulation and the roof sheathing. Injection foam insulation stops air leakage. Insulation ratings are measured in r values per inch of thickness.

Effective date of adoption. 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. Adopted building codes. The higher the r value the greater the insulating effectiveness.

Modifications to the code. All requirements of the state of oklahoma roofing program and the state of oklahoma roof warranty roofing system manufacturer s warranty rsmw 6. Ok oklahoma oklahoma uniform building code 3 r 15. Insulation r value requirements for usa.

International residential code 2015 edition irc 2015. Sheet metal and air conditioning contractor s national association smacna 5. Another major performance issue with insulation and energy savings is its air sealing capability. For roofing replacements it is necessary to look at the ibc.

All recommendations of the national roofing contractors association nrca 4. R value is a measure of insulation s ability to resist heat traveling through it. The us department of energy estimates that up to 40 or more of your home s energy loss is due to air leakage. Sheet metal and air conditioning contractor s national association smacna 5.

Insulation r values vary based on the type thickness and density of the insulation material. Insulation level are specified by r value. All recommendations of the national roofing contractor s association nrca 4.