Oklahoma Roof Insulation Requirements

International residential code 2015 edition irc 2015.

Oklahoma roof insulation requirements. 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. Insulation ratings are measured in r values per inch of thickness. Insulation level are specified by r value.

The higher the r value the greater the insulating effectiveness. The r value of thermal insulation depends on the type of material its thickness and its density. Sheet metal and air conditioning contractor s national association smacna 5. Existing buildings requirements are sprinkled throughout the i codes.

R value is a measure of insulation s ability to resist heat traveling through it. Sheet metal and air conditioning contractor s national association smacna 5. The higher the r value the better the thermal performance of the insulation. State applicable energy ashrae zone minimum r value state.

The information contained in this document is meant to be used as a quick reference guide for insulation levels across the united states. Another major performance issue with insulation and energy savings is its air sealing capability. Modifications to the code. Not less than a 1 air space shall be provided between the insulation and the roof sheathing.

Insulation r value requirements for usa. Adopted building codes. Insulation is rated in terms of thermal resistance called r value which indicates the resistance to heat flow. Ok oklahoma oklahoma uniform building code 3 r 15.

The higher the r value the better the insulation. Minimum insulation r value requirements non residential above roof deck. 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. Effective date of adoption.

An r value tells you how well a type of insulation can keep heat from leaving or entering your home. All recommendations of the national roofing contractor s association nrca 4. All recommendations of the national roofing contractors association nrca 4. Insulation r values vary based on the type thickness and density of the insulation material.

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. For roofing replacements it is necessary to look at the ibc. The table below shows what levels of insulation are cost effective for different climates and locations in the home.