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Models GPI, GPIP and GPIR

These curbs are designed for roof decks covered with 2 to 6 inches of insulation. Model GPI is for use on flat roofs, GPIP for pitched roofs and GPIR is available for ridged (double pitched) roofs. They are mounted directly to the roof deck before the insulation is applied, then roofed and flashed to the top of the wood nailer for weather tightness. Models GPI, GPIP and GPIR are standard with fully welded construction, 1‑inch insulation and 2‑inch flashing flange. Models are available in heights of 12 to 24 inches.

Models GPF, GPFP and GPFR

These curbs are designed for non-insulated roof decks. Model GPF for flat roofs, GPFP for pitched roofs and GPFR is available for ridged (double pitched) roofs. Models are mounted directly to the roof deck, then roofed and sealed to the 5‑inch flashing flange. Models GPF, GPFP and GPFR are standard with fully welded construction and 1‑inch insulation. Models are available in heights of 8 to 24 inches.

Model GPS

The GPS curbs are designed for use on flat, non-insulated roof decks. They are mounted directly to the deck structure with a 11⁄8‑inch flashing flange, then roofed and flashed to the top of the wood nailer for weather tightness. For pitched or ridged applications, use models GPIP, GPIR, GPFP, or GPFR. Model GPS consists of a fully welded body and 1‑inch insulation. Model GPS is available in heights of 8 to 18 inches.

Model GPR (with raised cant)

This curb is designed for use on flat, insulated roof decks. It is mounted directly to the deck structure with a 11⁄8‑inch flashing flange, then roofed and flashed to the top of the wood nailer for weather tightness. For pitched or ridged applications, use models GPIP, GPIR, GPFP, and GPFR. Model GPR has fully welded construction and 1‑inch insulation. Available heights for model GPR are 8 to 18 inches. The raised cant is available up to 6 inches in height.

Model GPFV

The GPFV vented roof curb is typically used for kitchen applications; the vents allow hot air and gases to escape between the ductwork and roof curb. This curb is designed for use with Greenheck fan models CUBE, CUE or USGF to provide the required 40‑inch minimum discharge height above the roof line per NFPA 96. This curb is to be used on non-insulated flat roof decks. Model GPFV is mounted directly to the roof deck structure, roofed to the vertical surface and sealed to the 5‑inch flashing flange. It is available in nine different sizes.