Medium Profile Hatch Upper Frame MK3

Restore Structural Strength & Precision Fit for MK3 Medium Profile Hatches

The Lewmar Medium Profile Hatch Upper Frame MK3 is a genuine OEM replacement designed to renew the structural integrity and clean finish of Lewmar’s Medium Profile MK3 Hatch assemblies. As the main support structure for the acrylic lens, seal, hinge points, and handles, it brings your hatch back to factory-grade performance.

Engineered for Exact MK3 Alignment

Built to Lewmar’s original MK3 specifications, the upper frame ensures correct geometry for smooth hatch movement, consistent seal compression, and proper handle engagement. Replacing a warped, corroded, or cracked frame restores the hatch’s operation condition. 

Durable Marine-Grade Construction

Manufactured from tough, UV-resistant and corrosion-proof materials, the frame is designed to withstand years of sun, spray, and heavy offshore use. Its rigidity and shape retention ensure long-term reliability in challenging marine environments.

Improves Sealing & Weather Protection

A fresh upper frame ensures the gasket seats evenly, reducing leaks, drafts, and wind noise. This maintains a dry, comfortable cabin and preserves the integrity of the hatch’s overall weatherproofing system.

Direct-Fit Replacement for MK3 Sizes

Available across multiple Medium Profile MK3 hatch sizes, the frame fits directly onto the existing lower frame, making repairs fast and straightforward. It is the ideal OEM solution for restoring hatch strength without replacing the entire assembly.