PABCO® Exterior Soffit

Primary Uses

  • Extra resistance to moisture and sagging in exterior ceiling applications.
  • New or renovation projects with frame spacing not more than 24 inches on center
  • Commercial and residential applications

PABCO® EXTERIOR SOFFIT Board is designed for application on the underside of exterior soffits, open porches, walkways, carport ceilings and similar installations that are completely protected from contact with water. The gypsum core contains additives that enhance its ability to resist sagging.  The core is wrapped in a moisture resistant paper to further increase its resistance to moisture.

1/2”  PABCO® EXTERIOR SOFFIT is available in Regular and Super C formulation and is used in residential construction.

5/8” Type X PABCO® EXTERIOR SOFFIT is used in commercial buildings when fire rated systems are required.

5/8” Type C PABCO® EXTERIOR SOFFIT is used in commercial buildings when extended fire rated systems are required.

Made in the USA

Core Thickness Width Length Edge Weight
1/2” (12.7 mm) 48” (1219 mm) 8’   (2334 mm)
12’ (3658 mm)
Tapered 1.7lbs/ft2
Super C
1/2” (12.7 mm) 48” (1219 mm) 8’   (2334 mm)
12’ (3658 mm)
Tapered 2.0lbs/ft2
Type X
5/8” (12.7 mm) 48” (1219 mm) 8’   (2334 mm)
12’ (3658 mm)
Tapered 2.3lbs/ft2
Type C
5/8” (12.7 mm) 48” (1219 mm) 8’   (2334 mm)
12’ (3658 mm)
Tapered 2.4lbs/ft2


Core: Gypsum Core Type Options: 
1/2” Regular (UL Core Type: Regular)
1/2” Super C (UL Core Type: PG-C)
5/8” Type X (UL Core Type: PG-11)
5/8” Type C (UL Core Type: TYPE-C)
Paper: 100% recycled content treated paper on front, back and long edges



ASTM C1396, Federal Specification SS-L-30D Type III & Grade X



PABCO Gypsum Installation Instructions
Gypsum Association GA-216


Surface Burn ASTM E84:

Flame Spread 15
Smoke Developed 0


Combustibility ASTM E136:


See the Gypsum Association Fire and Acoustic Guide GA-600
Underwriters Laboratories, UL fire Resistance Directory Design Number:

Super C (PG-C) ½”

G502, G504, G515, G523, G524, G526, G527, G528, G529, G530, G531, G533, G534, L502, L503, L504, L507, L510, L512, L514, L524, L525, L530, L542, L587, P237, P510, P512, U312, U313, U317, U320, U406, U410, U412, U426, U428, U429, U435, U436, U438, U440, U441, U443, U444, U448, U451, U452, U453, U454, U455, U467, U474, U478, U529, U608, U620, U910, U912, U914, V418, X507, X513, X514, X515, X518, X520, X521, X522, X523, X524, X530, X531.

Type X (PG-11) 5/8”

G501, G503, G505, G507, G508, G520, G531, L501, L508, L532,L556, L591, N501, N502, N505, P225, P227, P727, P230, P235, P250, P254, P259, P266, P302, P508, P510 , P516, P517, P540 ,P541, P743, P745, P747, P749, P751, P811, P829, U017, U026, U032, U040, U204, U207, U208, U301, U302, U305, U309, U321,U326, U329, U330, U332, U337, U338, U339, U341, U342, U344, U351, U354, U355, U356, U357, U358, U360, U364, U369, U374,U379, U411, U418, U420, U421, U425, U434, U436, U439, U442, U445, U449, U450, U460, U465, U466, U467, U469, U473, U475,U485, U487, U494, U495, U502, U504, U505, U506, U510, U512, U609, U615, U617, U622, U623, U626, U633, U637, U646, U647,U648, U651, U652, U926, V304, V310, V417, V419, V420, V421, V430, V431, V432, V434, V435, X508, X510, X516, X517, X525,X526, X527, X528, X538, X602.

Type C 5/8”

D301, D501, D502, D505, G501, G503, G505, G512, G515, G521, G523,G525, G526, G527, G528, G529, G530, G531, G538, J501, J503, J504, L501, L505, L508, L511, L512, L513, L514, L516, L520,L523, L525, L526, L527, L528, L529, L530, L538, L539, L540, L541, L588, L591, L592, L598, M508, M519, N501, N502, N505, P502,P503, P504, P505, P506, P507, P508, P509, P510, P513, P514, P519, P549, P554, U023, U301, U302, U305, U309, U311, U329,U333, U334, U340, U342, U354, U355, U374, U379, U411, U428, U429, U442, U445, U451, U457, U465, U466, U467, U469, U473,U485, U501, U502, U504, U505, U506, U510, U512, U602, U605, U617, U627, U642, U643, U645, V304, V310, V414, V417, V419,V495, X501, X502, X504, X508, X509, X516, X517.

Sustainably manufactured in Las Vegas, NV from raw material extracted from the same location.
For additional LEED and sustainability information, please contact PABCO Gypsum Technical Services.