Residential Roof R Value Requirements

The document was updated in 2020 and is available on the carlisle syntec website.

Residential roof r value requirements.

Non residential above roof deck this matrix provides the minimum insulation r values required by local and state municipalities. The higher the r value the greater the insulation performance. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Minimum insulation r value requirements non residential above roof deck.

Browse product options or contact your local insulfoam rep to help you quickly pick the best products to simplify your building envelope needs and fit your project budget all with one supplier. R value measures how well certain building insulation materials can resist heat. R value based method of section c402 1 3 u c and f factor based method of section c402 1 4. Know exactly how much you need with our project calculators.

R value state local al alabama 2015 alabama commercial energy code 2 r 25 3 r 25 state local ak alaska 2012 alaska building energy efficiency standard. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. Always double check with your local authority to confirm which code is currently in effect. R value is a measure of insulation s ability to resist heat traveling through it.

What r value do i need. Specific insulation requirements of section c402 2 thermal requirements of either. Insulation level are specified by r value. Recommended home insulation r values.

Iecc 2015 requirements by climate zone 3. State applicable energy ashrae zone minimum r value state local ms mississippi ashrae 90 1 2010 2 r 20 3 r 20. Minimum insulation r value requirements non residential above roof deck is an extremely handy table for state and local jurisdictions in the united states. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

Minimum insulation r value requirements by state. Or component performance alternative of section c402 1 5 roof solar reflectance and thermal emittance fenestration in building envelope. The higher the r value the better the thermal performance of the insulation. When determining how much insulation you need don t guesstimate calculate.