Oklahoma Roof Insulation Requirements

All recommendations of the national roofing contractor s association nrca 4.

Oklahoma roof insulation requirements.

For roofing replacements it is necessary to look at the ibc. The higher the r value the better the insulation. Another major performance issue with insulation and energy savings is its air sealing capability. Ok oklahoma oklahoma uniform building code 3 r 15.

All requirements of the state of oklahoma roofing program and the state of oklahoma roof warranty roofing system manufacturer s warranty rsmw 6. Not less than a 1 air space shall be provided between the insulation and the roof sheathing. Injection foam insulation stops air leakage. 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. Insulation level are specified by r value. Adopted building codes. R value is a measure of insulation s ability to resist heat traveling through it.

The r value of thermal insulation depends on the type of material its thickness and its density. 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 higher the r value the greater the insulating effectiveness. The higher the r value the better the thermal performance of the insulation.

Minimum insulation r value requirements non residential above roof deck. All recommendations of the national roofing contractors association nrca 4. The information contained in this document is meant to be used as a quick reference guide for insulation levels across the united states. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

International residential code 2015 edition irc 2015. 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. State applicable energy ashrae zone minimum r value state.

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 ratings are measured in r values per inch of thickness. Insulation r values vary based on the type thickness and density of the insulation material.

An r value tells you how well a type of insulation can keep heat from leaving or entering your home. Existing buildings requirements are sprinkled throughout the i codes. Insulation r value requirements for usa.