Thermiser Rolling Door | Insulated Doors | Cookson Door

Insulated Doors – Model Number: Esd20

Insulated Roll Up Door

Our energy-efficient Thermiser® Insulated Rolling Doors combines the robustness of a rolling steel door with foamed in place insulation.  Two layers of formed steel combined with foamed in insulation make the Thermiser® overhead door one of the most secure rolling doors available.

Insulation is just the first step in environmental control. If cold or warm air can escape around the door, it is not doing the complete job. Our Thermiser® insulated doors also have our panted door perimeter sealing system, providing a full barrier against the elements.

Not only does this offers superior protection against the elements, improved security and reduced sound transmission – both outside your building, sealing the building envelope, and inside.

Just like any Cookson roll up door, our insulated doors are all custom manufactured to your specifications. With multiple options in overhead door materials, finishes, operators and more, the Thermiser® insulated roll up door is not only a top choice but can meet any need our solution you have.

The doors are constructed for daily use and can withstand operation of up to 20 cycles per day – that’s 50,000 cycles for the lifetime of the door. 

If your requirements call for more than 20 cycles per day, or 50,000 cycles lifetime, visit our line of High Performance Doors.

Our doors can open by motor, chain, hand-crank, or push-up operation, depending on size, weight and/or frequency of operation.

  • Model MG: A medium duty operator for doors that will cycle no more than 20 times per day
  • Model SG: A super duty, full logic operator for larger doors or doors which may periodically cycle more than 20 times per day

Learn more about our operators.

If your requirements call for continuous use and cycles far greater than 20 times per day, consider our line of High Performance Doors.


Double skin interlocking roll formed interior and exterior metal slats :

  • R-value of 8 as calculated using the ASHRAE Handbook of Fundamentals

Slats are filled with 7/8″ thick closed cell pressure foamed in place urethane insulation:

  • Flame Spread Index of 0
  • Smoke Developed Index of 10 as tested per ASTM E84
  • CFC-free process with an Ozone Depletion Potential rating of 0
  • Meets foam plastic insulation requirements of the 2012 IBC®, section 2603

Exterior Slat Gauge

Interior Slat Gauge

GalvaNex Color











Exterior Slat Gauge


Interior Slat Gauge




Exterior Slat Gauge


Interior Slat Gauge



Mill, Clear, Color Anodized

Click here for additional material and finishes options and information

Finish/gauge availability varies. Contact us for detailed finish/gauge availability or special requests.

AtmoShield™ Powder Coating – Textured powder coat finish that combats the environments harsh wear and tear. This finish provides a thicker, more scratch resistant coat for added product protection.

Chain Diverter for MGH Operators – This option moves the auxiliary chain out of the clear opening and to the side of the door – enabling free movement through the door and making a chain bag unnecessary.

Hood and Operator Covers – Metal cover to protect the coil or operator from exterior weather, debris or to meet OSHA or UL 325 safety requirements.

SpectraShield™ Powder Coating – Polyester finish in more than 180 colors for durability, aesthetics, superior finish life and cost effectiveness.

Trim Package – In applications where exterior aesthetics are important, such as hotels, condominiums, convention centers and parking garages, the addition of a trim package can cover unsightly hardware and contribute to the building’s architecture.

Vinyl Graphics – Add durable, full-color images to your curtains and hoods. Great for school logos and turning unused door space into profitable sponsorship opportunities in stadiums, amusement parks and retail stores.

Vision Windows – Improve aesthetics and visibility with one- or two-way windows incorporated in the curtain.

High Cycle Springs – Heavy duty springs manufactured to withstand cycles of 100,000.

Seismic Performance Validation -We can provide project specific seismic calculations for all coiling doors that are mounted Face of Wall to steel or masonry. Seismic performance validation is per ASCE 7-05.

Entrapment Protection Devices – Entrapment protection devices ensure that a motorized door or grille will not close on an object.  If an object enters path of closure, the entrapment protection device will stop the door or grille from closing and return it to the fully open position.

Guide-Mounted Interlocks – An electrical cutout switch to prevent motor operation if locking device is not first disengaged.

HDBB (Heavy Duty Bottom Bar) – The HDBB is 350% stronger than traditional bottom bars, preventing forklift damage to your Service or Insulated Door.  The HDBB can pay for itself after the first impact and significantly reduce future maintenance costs.

RapidResponse – RapidResponse doors are provided with 3′ or 6′ of extra curtain, an impactable bottom bar and removable lower guide sections.  These features allow for faster repair of slat damage, reducing downtime and maximizing the lifetime value of your door.

Rolling Door Protector (RDP) – The RDP eliminates costly fork truck damage to coiling doors by creating a physical barrier at the top of the door that absorbs impacts. 

Static Wind Load – Can be configured to withstand the full range of specific wind load requirements including missile impact ratings.

Operational Wind Load – Can be configured to withstand an operational wind load of 20 PSF.

Mullions – There are multiple mullion options –  corner, fixed and removable.

Pass Doors – Hollow metal man door and hinged frame available within a curtain.

Sloping or Irregular Openings – Our special bottom bar designs can address these conditions.

Superimposed Doors – Combine two different curtains on the same opening. Typically, an insulated door is used in conjunction with an open design rolling grille to provide ventilation. When extreme weather or sound resistance is desired, we can provide superimposed/double insulated curtain assemblies.


Drawing Generator

Need to see clearances and mounting details? Enter your opening dimensions into our Drawing Generator, and get custom generated drawings of your door with all the details.

Codes & Listings

  • ISO 9001:2008
  • Buy America Compliance
  • LEED® Compliance

See Codes and Listings page for detailed information.