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Service & Support

Jamison is dedicated to delivering prompt and courteous service to all of our customers. That is why we stock most repair parts in our multi-million dollar inventory and can ship stocked parts the same day if the order is received before noon. This is just one more way that Jamison delivers.

Mark IV™ Vertical Sliding Manually Operated Door



A favorite of industry experts, Jamison’s Vertical Sliders are extremely versatile with design configurations for virtually any application.

Mark IV® Vertical Lift Manually Operated Door


  • Easy Installation: With track and angles preassembled on our casings, installation is quick and easy.
  • Flexibility: Closer positioning of doorways also provides critical floor and wall space savings
  • Design Excellence: These doors are equipped with a unique "down-and-in" joggle track system that assumes friction-free operation until the last few inches of travel in the closing cycle. Additionally, our vertical and overhead doors employ an automatic locking top latch and counter-balance system for secure, finger-tip operation.
  • Versatile: Designed to handle up to a 100F Delta T.
  • Specifications
    • Door is filled with 4” Jamison foamed-in-place non-CFC polyurethane insulation, with a minimum R value of 32 at 20F for 4 inch doors per ASTM C-518
    • Extruded aluminum structure provides superior strength.
    • Standard panels are white, stucco-embossed #26 gauge galvanized steel, front and back.
    • Adjustable gaskets at sides and head of frame are polyester reinforced.
    • Hardware and track have protective coating to prevent corrosion.
    • Available as power-operated or manually-operated.
    • 5-year limited warranty
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