Jamoguard™ Overlap Infitting Swing Door

When superior thermal separation is a must, Jamison's overlap cooler and freezer doors offer the highest level of protection. The Jamoguard™ panel fully overlaps the frame, creating a tighter seal than traditional infitting swing doors making them a great choice for penthouse and other high-pressure applications. 

Industries

Cold Storage

Industry & Manufacturing

Logistics & Distribution

Benefits

• Superb thermal performance 

• Ideal for low-temperature spaces 

• Excellent separation for exterior/interior spaces 

Features & Benefits

Lightweight & Lasting

The Jamoguard™ overlap doors use lightweight and lasting aluminum, #26 stucco embossed steel, or optional stainless steel.

Exterior-Grade Durability

Built to withstand weather, wind, and temperature extremes in interior to exterior access zones.

Built for Extreme Conditions

Jamoguard™ overlap freezer doors offer insulation up to R-48, delivering superior thermal defense in the most demanding environments.

Article information

Designed with a unique 4-sided overlapping panel, the Jamoguard™ overlap forms a tighter seal than standard infitting doors. This virtually eliminates air leaks and keeps environments well separated. 

The lightweight Jamoguard™ overlap door is easy to operate but durable enough for interior-to-exterior access points. Throughout the years, many customers choose the overlap as the go-to solution for penthouse doors. Made with exterior-grade materials, and available woodless options, the overlap offers lasting strength against the elements while offering top-tier thermal separation. 

Overlap Design

An overlap swing door is an insulated panel door designed to close against the face of the frame. Rather than a flush-mounted system, the overlapping door provides a superior seal. This minimizes thermal loss, making it ideal for cold storage. 

Superior Sealing

By closing against the face of the frame, the overlap door eliminates gaps that commonly allow air leakage. This configuration significantly reduces infiltration of warm, moist air into cold environments.

Excellent Thermal Separation

Swing overlap doors are ideal for high-traffic environments where frequent door cycles are the norm. Their durable construction and reliable seal allow them to quickly re-establish thermal separation after each opening—minimizing energy loss and maintaining environmental control.

Why Choose an Overlap Door Over Other Swing Door Styles?

The Jamoguard™ overlap swing door stands out for its rigid panel design. Jamison engineers each panel to withstand high pressure, ensuring the door resists bowing and performs reliably. This strength makes it especially valuable for access doors in penthouse refrigeration units, where pressure differences can strain lesser doors. 

The result is a long-lasting, low-maintenance solution that keeps its performance edge even in the most demanding environments. Crafted with Jamison’s time-tested manufacturing, overlap doors are backed by over 110 years of proven expertise. When strength and long-term reliability matter, overlap doors offer a clear advantage. 

Where the Overlap Door Excels

Refrigeration Penthouse Doors  

With heavy-duty panel construction, these perform reliably as penthouses doors or other exterior openings. 

Food Production Environments 

Food and beverage doors provide critical defense for controlled environments. These production spaces look to the Jamoguard™ overlap cold storage doors for easy access. 

Facilities in Harsh Climates 

For cold storage providers that operate in humid climates, good interior-exterior doors are necessary. Jamison Door's overlap solutions help minimize drastic temperature swings at these openings