Title 24 - Part 6 Cool Roof 

Title 24 is the Energy Efficiency portion of the California Building Code reducing per person energy usage in California.

Highlights:

• Title 24 regarding Cool Roofing became law in October 2005
  
  
• All low slope roofs installed after this date must have a 3-year aged solar reflectance of 0.55 or a Solar Reflectance Index (SRI) of 64 and above.
  
  
• National Coatings’ AcryShield^® products exceed Title 24 requirements.
  
  
• The high reflectance and emittance values of AcryShield roof coating products allow for the substitution of lower efficiency building components in other areas of building design.

The table below shows products manufactured by National Coatings Corporation which can be used to comply with 2016 Title 24, Part 6 Cool Roof Requirements:

		Solar Reflectance		Thermal Emittance			SRI
NCC Product	Color	Initial	3-year	Initial		3-year	Initial		3-year	CRRC Product ID
AcryShield A179	White	0.92	0.81	0.88		0.85	117		101		0626-0015
AcryShield A400	White	0.83	0.75	0.88		0.92	104		93		0626-0001
AcryShield A400	Sand	0.72	0.67	0.91		0.91	89		82		0626-0007
AcryShield A400RL	Lt. Grey	0.73	0.70*	0.89		0.87*	90		85*		0626-0025
AcryShield A420	White	0.83	0.76	0.88		0.92	104		95		0626-0004
AcryShield A420	Sand	0.74	0.68	0.93		0.93	92		84		0626-0014
AcryShield A500	White	0.83	0.73	0.88		0.95	104		91		0626-0002
AcryShield A500	Sand	0.72	0.63	0.92		0.90	89		76		0626-0008
AcryShield A500RL	Lt. Grey	0.71	0.68*	0.90		0.89*	87		83*		0626-0026
AcryShield A510	White	0.84	0.74	0.92		0.89	106		91		0626-0010
AcryShield A510	Sand	0.72	0.66	0.91		0.89	89		80		0626-0020
AcryShield A510RL	Lt. Grey	0.73	0.70*	0.90		0.88*	90		85*		0626-0027
AcryShield A550	White	0.86	0.81	0.88		0.93	108		102		0626-0003
AcryShield A590	White	0.92	0.87	0.87		0.88	117		110		0626-0006
AcryShield A600	White	0.83	0.76	0.88		0.94	104		95		0626-0005
AcryShield A600RL	Lt. Grey	0.72	0.69*	0.91		0.90*	89		84*		0626-0028
AcryShield A610	White	0.86	0.73	0.91		0.93	109		91		0626-0013
AcryShield A610RL	Lt. Grey	0.72	0.69*	0.91		0.90*	89		84*		0626-0029
AcryShield A640	White	0.83	0.77	0.94		0.92	105		96		0626-0011
RoofGuard Granules	White	0.71	0.55	0.95		0.96	88		67		0626-0009
SRC 740	White	0.89	0.73	0.90		0.88	113		90		0626-0024
SRC 750	White	0.89	0.73	0.90		0.88	113		90		0626-0034

Helpful Website Links:

California Energy Commission – Title 24

Cool Roof Rating Council

ASTM International

*CRRC Rapid Ratings: These are interim laboratory-aged values that simulate weathered values. These values will be replaced with the measured three-year aged values upon completion of the weathering process. SRI values calculated using Rapid Ratings may change once the aged rating replaces the interim rating.