WB EXT 1300 Series

Insulated Exterior Access Doors with Locking T-Handle

Sizes & Specifications

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Williams Brothers - WB EXT 1300 Series Insulated Exterior Access Door / Panel with Locking T-Handle

Heavy-duty, Insulated Access Panel Features Weather-resistant Gaskets and Locking T Handle!

The WB EXT 1300 Series Insulated Exterior Access Door with Locking Paddle Latch is a durable, flush access panel designed for installation in exterior walls in applications where both weather resistance and air flow are required. Featuring heavy-duty, 16 gauge rust resistive, galvannealed steel construction and a white baked, paintable enamel finish, door is one of the few exterior access panels in the industry that features two layers of weather resistant gaskets to help prevent water intrusion (certain saltwater areas might not be compatible).


  • Door: 16 Gauge Steel
  • Frame & Trim: 16 Gauge Steel, 2″ Wide Flange
  • Finish: White Baked Enamel, Paintable Surface
  • Latches: Chrome Plated “T” Type Locking Handle with Pivot Rod 1 Point Catch (3 point catch on 18″ X 18″ and above) and WB Key Code Cylinder Lock
  • Hinges: Continuous Piano Hinge
  • Insulation: Double layer of 1″ GreenGuard® Extruded Polystyrene Insulation Board (R-Value @ 75° F Mean 5.0 x 2, FM approved)
  • Gasket: Double Layer Weather Resistant Polyurethane on Front Edge and Neoprene on The Back Inside Edge of Frame
  • Application: Walls Only


  • Interior Latch Release: Allows Opening of Door from Inside (see Model EXT 1350 Series)
  • Custom Sizes: Available on Request


The WB EXT 1300 exterior access panel is available in a variety of sizes including 8×8, 12×12, 16×16, 18×18, 24×24 and more. In addition, custom sizes are available upon request. Door features a piano hinge, “T” handle lock, gaskets, GreenGuard insulation, and an exposed flange.

Manufactured by The Williams Brothers Corporation of America. MADE IN VIRGINIA – USA.