Portals Plus 38161, Double RC-2A Straight Sided Curb- 18" High

The Portals Plus Double RC-2A Straight-Sided Roof Curb (POR-38161) is engineered for rooftop decking conditions with lightweight fill or tapered insulation where multiple pipe penetrations occur. The specification covers penetrations of up to two pipes 0.375″-1″ in diameter, up to two pipes 1″-2″ in diameter and one pipe 2″-6″ in diameter. The curb shell is fabricated of 18-gauge galvanized steel with integral base plate and continuously welded corner seams, includes a factory-installed wood nailer, and is built with 1.5″-thick 3 lb rigid fiberglass insulation. The unit is designed to receive a laminated, acrylic-coated ABS plastic curb cover with pre-punched holes and molded sealing rings on two 8″-collared openings, and is specified to be used with EPDM compression-molded caps models C-126 & C-212.

Key features

• Supports multi-pipe penetrations including small and medium diameters in one curb assembly.
• 18-gauge galvanized steel construction with welded seams and integral base plate for structural integrity.
• Factory-installed rigid fiberglass insulation (1.5″ thick, 3 lb) provides thermal and condensation control.
• Engineered for decks with lightweight fill or tapered insulation and integrates with double-pipe portal systems.

• SKU: POR-38161
• Product type: Double RC-2A Straight-Sided Roof Curb 9 ½″ High
• Dimensions: Length 27 ½″ × Width 12″ × Height 9 ½″
• Supported penetrations: Up to two pipes 0.375″–1″, up to two pipes 1″–2″, and one pipe 2″–6″ in diameter
• Construction: 18-gauge galvanized steel with integral base plate and welded seams
• Insulation: 1.5″ thick 3 lb rigid fiberglass, factory installed
• Application: For roofs with lightweight fill or tapered insulation where multiple pipe penetrations occur

Q: What are the dimensions of this curb assembly?
A: It measures 27 ½″ long, 12″ wide, and 9 ½″ high, providing a compact profile for dual-pipe penetrations.

Q: What pipe sizes can this curb support when used with a portal system?
A: It supports two pipes 0.375″–1″, two pipes 1″–2″, and one pipe 2″–6″ in diameter when paired with the appropriate Portals Plus caps and covers.

Q: Does the factory insulation help with energy efficiency and condensation control?
A: Yes, the 1.5″ thick 3 lb rigid fiberglass insulation reduces heat transfer and minimizes moisture buildup under the curb.

Q: Can this curb be used on roofs with tapered insulation or lightweight fill?
A: Yes, it is specifically designed for those conditions and provides a stable, level mounting surface for roof penetrations.