Portals Plus 38101, Small RC-2A Straight Sided Roof Curb- 18" High

The Portals Plus Small RC-2A Straight-Sided Roof Curb 18″ High (POR-38101) provides a durable mounting base for pipe portal systems on roofs with lightweight fill or tapered insulation. It measures 12″ long by 12″ wide by 18″ high and is constructed from 18-gauge galvanized steel with continuously welded seams for strength and leak prevention. A factory-installed 1.5″ thick 3 lb rigid fiberglass insulation board lines the curb walls, while a wood nailer at the top perimeter ensures secure membrane attachment. The RC-2A curb supports pipes ranging from ½″ to 2½″ nominal size when paired with the appropriate pipe portal assembly.

Key features:

• Measures 12″ (L) × 12″ (W) × 18″ (H), providing a compact, straight-sided curb profile.
• Built from 18-gauge galvanized steel with welded seams for superior weather resistance.
• Factory-insulated with 1.5″ thick 3 lb rigid fiberglass to reduce heat transfer and condensation.
• Designed for use with pipe portal systems handling ½″ – 2½″ nominal pipe sizes.

• SKU: POR-38101
• Product type: Roof Curb
• Dimensions: Length 12″ × Width 12″ × Height 18″
• Fits to pipe size: ½″ – 2½″ nominal pipe
• Construction: 18-gauge galvanized steel with integral base plate and welded seams
• Insulation: 1.5″ thick 3 lb rigid fiberglass, factory installed
• Wood nailer: Factory-installed around top perimeter for roofing membrane attachment
• Application: For decks with lightweight fill or tapered insulation and used with compatible pipe portal systems

Q: Can this roof curb be used for both new and retrofit roofing applications?
A: Yes, it can be installed in new construction or retrofitted onto existing roof decks when properly flashed and supported.

Q: What is the advantage of the straight-sided curb design?
A: The straight-sided design provides a stable, vertical mounting surface that works well with tapered or lightweight fill insulation, ensuring a level top edge for flashing.

Q: Is the insulation included or added during installation?
A: The curb is factory-insulated with 1.5″ thick 3 lb rigid fiberglass insulation for thermal efficiency and moisture control.

Q: What pipe sizes does this curb accommodate when paired with a pipe portal system?
A: It fits pipe diameters from ½″ to 2½″ nominal size when used with compatible portal assemblies.