Codes & Standards

ASHRAE 90.1 – 2007 (90.1 ASHRAE 2004)
Climate Zone	Roof (Conditioned)		Roof (Semi-Heated)		Walls (Conditioned)		Walls (Semi-Heated)
Climate Zone	Performance	Prescriptive	Performance	Prescriptive	Performance	Prescriptive	Performance	Prescriptive
1	0.065^a	R-19	1.280	NR	0.113	R-13	1.180	NR
2	0.065^a	R-19	0.167	R-6	0.113	R-13	0.184	R-6
3	0.065^a	R-19	0.097	R-10	0.113	R-13	0.184	R-6
4	0.065	R-19	0.097	R-10	0.113	R-13	0.134	R-10
5	0.065	R-19	0.097	R-10	0.113	R-13	0.123	R-11
6	0.065	R-19	0.097	R-10	0.113	R-13	0.113	R-13
7	0.065	R-19	0.097	R-10	0.057	R-13 + R-13	0.113	R-13
8	0.049	R-13 + R-19	0.072	R-16	0.057	R-13 + R-13	0.113	R-13

Climate Zones 1-8 are standing seam roofs with a 1″ thick thermal spacer block. NR=No Requirement
a. For Metal Building roof panels installed directly above conditioned paces that are not cooled, where the exterior surface has a Solar Reflectance of 0.70 and a minimum Thermal Emittance of 0.75 or a Solar Reflectance Index of 82, the roof insulation shall comply with a maximum U-Factor of 0.084 for Climate Zone 1, U-Factor of 0.078 for Climate Zone 2, and a U-Factor of 0.076 for Climate Zone 3

ASHRAE 90.1 – 2010 (90.1 – 2007 addendum g)
Climate Zone	Roof (Conditioned)		Roof (Semi-Heated)		Walls (Conditioned)		Walls (Semi-Heated)
Climate Zone	Performance	Prescriptive	Performance	Prescriptive	Performance	Prescriptive	Performance	Prescriptive
1	0.065^a	R-19	0.167	R-6	0.093	R-16	0.113	R-13
2	0.055^a	R-13 + R-13	0.097	R-10	0.093	R-16	0.113	R-13
3	0.055^a	R-13 + R-13	0.097	R-10	0.084	R-19	0.113	R-13
4	0.055	R-13 + R-13	0.097	R-10	0.084	R-19	0.113	R-13
5	0.055	R-13 + R-13	0.083	R-13	0.069	R-13 + R-5.6 ci	0.113	R-13
6	0.049	R-13 + R-19	0.072	R-16	0.069	R-13 + R-5.6 ci	0.113	R-13
7	0.049	R-13 + R-19	0.072	R-16	0.057	R-13 + R-5.6 ci	0.113	R-13
8	0.035	R-11 + R-19 LS	0.065	R-19	0.057	R-13 + R-5.6 ci	0.113	R-13

Climate Zones 1-8 are standing seam roofs with a minimum R-3.5 thermal spacer block. L=Liner System, ci=Continuous Insulation
a. Metal Building roof panels installed directly above cooled conditioned spaces in Climate Zone 1, shall comply with a minimum 3-year aged Solar Reflectance of 0.55 and a minimum 3-year aged Thermal Emittance of 0.75 or a
minimum 3-year aged Solar Reflectance Index of 64, if not, the roof insulation must be increased by installing a system with a maximum U-Factor of 0.028.

ASHRAE 90.1 – 2013, 2016, 2019 & 2022
Climate Zone	Roof (Conditioned)		Roof (Semi-Heated)		Walls (Conditioned)		Walls (Semi-Heated)
Climate Zone	Performance	Prescriptive	Performance	Prescriptive	Performance	Prescriptive	Performance	Prescriptive
0 & 1*	0.041^a	R-10 + R-19 FC	0.115	R-10	0.094	R-0 + R-9.8 ci	0.352	NR
2	0.041^a	R-10 + R-19 FC	0.096	R-16	0.094	R-0 + R-9.8 ci	0.162	R-13
3	0.041^a	R-10 + R-19 FC	0.096	R-16	0.094	R-0 + R-9.8 ci	0.162	R-13
4	0.037	R-19 + R-11 LS or R-25 + R-8 LS	0.082	R-19	0.060	R-0 + R-15.8 ci	0.162	R-13
5	0.037	R-19 + R-11 LS or R-25 + R-8 LS	0.082	R-19	0.050	R-0 + R-19.0 ci	0.094	R-0 + R-9.8 ci
6	0.031	R–25 + R-11 LS	0.060	R-19 + R-19	0.050	R-0 + R-19.0 ci	0.094	R-0 + R-9.8 ci
7	0.029	R- 30 + R-11 LS	0.037	R-19 + R-11 LS or R-25 + R-8 LS	0.044	R-0 + R-22.1 ci	0.072	R-0 + R-13 ci
8	0.026	R-25 + R-11 + R-11 LS	0.037	R-19 + R-11 LS or R-25 + R-8 LS	0.039	R-0 + R-25 ci	0.060	R-0 + R-15.8 ci

Climate Zone 1-8 are standing seam roofs with minimum R-3 thermal spacer block, except for the Filled Cavity (FC) systems which require a minimum R-5 thermal spacer block;
LS = Liner System, ci = Continuous Insulation
a. Metal Building roof panels installed directly above cooled conditioned spaces, shall comply with a minimum 3-year aged Solar Reflectance of 0.55 and a minimum 3-year aged Thermal Emittance of 0.75 or a minimum 3-year aged
Solar Reflectance Index value of 64, if not, the roof insulation must be increased by installing a system with a maximum U-Factor of 0.028.
*Climate Zone 0 was added in 2019.

IECC – 2009
Climate Zone	Roof		Walls
Climate Zone	Performance	Prescriptive	Performance	Prescriptive
1	0.065	R-19	0.093	R-16
2	0.055	R-13 + R-13	0.093	R-16
3	0.055	R-13 + R-13	0.084	R-19
4	0.055	R-13 + R-13	0.084	R-19
5	0.055	R-13 + R-13	0.069	R-13 + R-5.6 ci
6	0.049	R-13 + R-19	0.069	R-13 + R-5.6 ci
7	0.049	R-13 + R-19	0.057	R-19 + R-5.6 ci
8	0.035	R-11 + R-19	0.057	R-19 + R-5.6 ci

LS = Liner System, ci = Continuous Insulation
Roof assemblies are based on a standing seam roof with an R-5 thermal spacer block.

IECC – 2012, 2015 & 2018
Climate Zone	Roof¹		Walls
Climate Zone	Performance	Prescriptive	Performance	Prescriptive
1	0.035	R-19 + R-11 LS	0.079	R-13 + R-6.5 ci
2	0.035	R-19 + R-11 LS	0.079	R-13 + R-6.5 ci
3	0.035	R-19 + R-11 LS	0.079	R-13 + R-6.5 ci
4	0.035	R-19 + R-11 LS	0.052	R-13 + R-13 ci
5	0.035	R-19 + R-11 LS	0.052	R-13 + R-13 ci
6	0.031	R-25 + R-11 LS	0.052	R-13 + R-13 ci
7	0.029	R-30 + R-11 LS	0.052	R-13 + R-13 ci
8	0.029	R-30 + R-11 LS	0.052	R-13 + R-13 ci

LS = Liner System, ci = Continuous Insulation
All information in this chart is based on the International Energy Conservation Code, Chapter 4. For specifics regarding years 2012, 2015 & 2018, please refer to Section C402 Building Envelope Requirements of the IECC.
1. Where using R-value compliance method, a thermal spacer block shall be provided. Please refer to IECC Section C402 for specific thermal block R-value requirements.”

IECC – 2021 & 2024
Climate Zone	Roof¹		Walls
Climate Zone	Performance	Prescriptive	Performance	Prescriptive
0	0.035^a,b	R-19 + R-11 LS	0.079	R-13 + R-6.5 ci
1	0.035^b	R-19 + R-11 LS	0.079	R-13 + R-6.5 ci
2	0.035^b	R-19 + R-11 LS	0.079	R-13 + R-6.5 ci
3	0.035	R-19 + R-11 LS	0.079	R-13 + R-6.5 ci
4	0.035	R-19 + R-11 LS	0.052	R-13 + R-13 ci
5	0.035	R-19 + R-11 LS	0.050	R-13 + R-14 ci
6	0.031	R-25 + R-11 LS	0.050	R-13 + R-14 ci
7	0.029	R-30 + R-11 LS	0.044	R-13 + R-17 ci
8	0.026	R-25 + R-11 + R-11 LS	0.039	R-13 + R-19.5 ci

LS = Liner System, ci = Continuous Insulation
All information in this chart is based on the International Energy Conservation Code, Chapter 4. For specifics regarding years 2021 & 2024, please refer to Section C402 Building Envelope Requirements of the IECC.
1. Where using R-value compliance method, a thermal spacer block shall be provided. Please refer to IECC Section C402 for specific thermal block R-value requirements.

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Documents

NIA Certified Faced Insulation Standard 404.2-2024

NAIMA ASHRAE Guide to Insulating Metal Buildings for Compliance

MBMA Best Practices to Comply with Whole Building Air Leakage Testing

NIA

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Home Innovation Research Labs™

Home Innovation Research Labs™ is a trusted certifier (50+ years) for builders, manufacturers, and consumers. They verify code compliance and product performance and certify insulation R-Value, so builders and consumers get the thermal performance they expect.

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FM APPROVED

Bay Insulation is the only laminator that has Factory Mutual approved Faced Metal Building Insulation, class 4880, with no height restriction. It is available upon request. Please contact your Bay Representative or the location closest to you.

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NAIMA 202-96® fiberglass metal building insulations are blanket insulations engineered specifically for metal building construction. These insulations are certified by the NAHB to meet the 202-96® standard for flexible fiberglass used in Metal Buildings and are engineered and produced to maintain their stated R-value after the rigors of facing lamination, shipping, storage, and handling that occurs during installation. Bay Insulation uses NAIMA 202-96® fiberglass when laminating R-10, R-11, R-13, R-16, R-25 and R-30.

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