JL Industries RHDG-5WT 48 × 48 Roof Hatch – Diamond Series, White Powder Coat

The JL Industries RHDG-5WT is a 48 × 48 ladder-access Diamond Series roof hatch built of galvannealed steel. It delivers thermal performance with R-6 insulation and features the Diamond Grip® embossed counterflashing for tool-free membrane securement. With a 75° door opening, clear opening of 37 × 42, and tested slam latch rated to 50 psf, this hatch is designed for reliability under demanding conditions.

Key Features

• Galvannealed steel curb and cover with 1″ polyisocyanurate (R-6) insulation
• Diamond Grip embossed counterflashing to secure roof membrane without tools
• Clear opening dimension 37″ × 42″
• Slam latch with inside/outside handles and padlock hasps, tested to 50 psf wind uplift
• Door opens to 75°

Curb: 14 gauge galvannealed steel single wall curb and counterflashing with Diamond Grip

Cover: 14 gauge galvannealed steel with 22 gauge liner, formed and welded, tested to support 40 psf live load

Finish: White textured powder coat paint

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

Insulation: 1″ polyisocyanurate in curb and cover, thermal resistance R-6

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

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

Hold-open arm: Clear zinc-plated automatic locking hold-open arm with red vinyl grip

Hinge: Heavy duty clear zinc-plated steel pintle hinge

Clear opening: 37″ × 42″

Door opening angle: 75°

Weight: 233 lb

Notes: For roof pitches up to 7:12, hinge side should be mounted parallel to slope

• Confirm roof opening and framing accommodate a 48″ × 48″ hatch.
• Place the curb, aligning the hinge side parallel to slope for roofs with pitch ≤ 7:12.
• Attach the curb per project fastening specification, maintaining continuous gasket contact.
• Install the cover; ensure the hold-open arm locks securely and the door opens to 75°.
• Test the slam latch from both inside and outside, and utilize padlock hasps if additional security is needed.

Q: What is the insulation value of the RHDG-5WT?
A: It uses 1″ polyisocyanurate insulation in both curb and cover, giving an R-6 thermal resistance.

Q: What is the clear opening inside the hatch?
A: The clear opening is 37″ × 42″.

Q: What wind uplift rating does the latch meet?
A: The slam latch is rated to resist 50 psf wind uplift.

Q: What is the weight of the hatch?
A: Approximately 233 lb.

Q: What live load is the cover tested to support?
A: 40 psf.