JL Industries RHDG-1WT 36 × 30 Roof Hatch – Double-Dome, White Powder Coat

The JL Industries RHDG-1WT is a Diamond Series roof hatch in galvannealed steel engineered for safe, easy roof access and energy savings with R-6 insulation. Its patented Diamond Grip secures the roof membrane without tools, and the white textured powder coat provides a durable finish. Hardware and components are designed for reliability and code-friendly performance.

Key Features

• Galvannealed steel curb and cover with R-6 insulation
• Diamond Grip roof membrane securement without tools
• Automatic locking hold-open arm with one-handed operation
• Slam latch with inside/outside handles and padlock hasps; tested to 50 psf wind uplift
• 36 x 30 ladder access size in the Diamond Series lineup

Material: Curb: 14 gauge galvannealed steel. Single wall curb and counterflashing with Diamond Grip secure roof membrane without tools. Cover: 14 gauge with 22 gauge liner galvannealed steel. Formed and welded with liner, tested to support a live load of 40 psf.

Finish: White textured powder coat paint.

Gasket: Continuous, weatherproof EPDM sponge rubber adhesive-backed seal.

Insulation: 1 in polyisocyanurate in curb and cover with thermal resistance R-6.

Hinge: Heavy duty clear zinc-plated steel pintle hinge.

Hold Open Arm: Clear zinc-plated automatic locking hold-open arm with red vinyl grip for one handed door operation.

Latch: Clear zinc-plated steel slam latch with inside and outside handles and padlock hasps; tested to 50 psf wind uplift.

Spring: Counterbalanced compression springs contained in clear zinc-plated steel cylinders.

Size: 36 in x 30 in, model RHDG-1WT (ladder access).

Notes: For pitched roofs up to 7:12, mount hinge side parallel to slope. Door opens 75°.

Additional features (options): Gray Textured Finish (GT); Red Textured Finish (RT); Bronze Textured Finish (BT); Steel Curb, Aluminum Cover (GA); R-9, 1.5 in Polyiso Curb (IP); R-12, 2 in Polyiso Curb (IT); 1 in Fiberboard (IF); Curb Double Wall (CD); 3/4 in Wood Nailer (IW); Stainless 316 Hinge Pin (SP); Stainless Hardware (SS); Curb Heights from 13 in to 22 in (H13–H22).

Accessories sold separately: Safety railing RSHWC (compression mount); LP-4 safety post, safety yellow.

• Verify roof opening and framing match the 36 x 30 ladder access size.
• Place curb, align hinge side parallel to slope if roof pitch is up to 7:12.
• Secure curb per project fastening method; ensure continuous gasket contact.
• Set cover and confirm hold-open arm locks and door opens to 75°.
• Test slam latch operation from inside and outside; add padlocks if required.

Q: What insulation value does the RHDG-1WT provide?
A: It includes 1 in polyisocyanurate insulation in the curb and cover with a thermal resistance of R-6.

Q: How does Diamond Grip work?
A: Diamond Grip secures the roof membrane at the counterflashing without tools to simplify installation.

Q: What wind uplift has the latch assembly been tested to?
A: The slam latch and assembly are tested to 50 psf wind uplift.

Q: What is the standard finish?
A: White textured powder coat paint is standard; additional textured finishes are available as options.

Q: What is the door opening angle?
A: The door opens to 75 degrees.