Insulated Steel Door Range

Insulated Steel Door

From £299.99 inc. VAT (£249.99 + VAT)

Our insulated steel doors are suitable for commercial, industrial and residential uses where you would need increased thermal performance.

Featuring our HOOPLY™ 19-point locking system, these doors are available in flush, panelled and cottage styles. Additional security upgrades are also available.

All of our thermal doors are supplied with an additional heavy-duty screw-in door seal and expanding foam, which will further assist in reducing heat transference. Also available as an Insulated Steel Double Door or a Custom Made Thermally Rated Door if you have a specific size or U-value requirement.

SKU: SD-INS-DOOR Category:

Our insulated doors are a great option for your property. The 2.2W/m2.k rated door includes a 50mm double-skinned galvanised steel door leaf with mineral wool insulation where as the 1.99W/m2.k rated door has a thicker 70mm door leaf.

With a 19-point locking mechanism and HOOPLY handles, our insulated doors are ideal to be used for additional security on your property. A range of security upgrades are also available.

Our doors are available in flush, Georgian 6-panel and cottage styles. Supplied from stock in Latham’s White we also have a wide range of RAL and BS colours available to suit your style.

As with all of our steel personnel doors, this door is fully compliant with the Disability Discrimination Act.

Door Type

Personnel Door

U Value

1.99, 2.20


Cottage Style Panel, Georgian 6 Panel, Plain door with flush panel

Available Sizes (mm)

695×2020, 795×2020, 845×2020, 895×2020, 910×2065, 995×2020, 1095×2020, 1195×2020, 890×2095, 990×2095, 495×2020 (Narrow), 595×2020 (Narrow)


White powder coat from stock, choice of colours available

Door Frame Depth

110mm, 90mm

Door Leaf Material

Double skinned 1.0mm galvanised steel, Double skinned 1.2mm galvanised steel

Door Leaf Depth

50mm, 70mm

Door Frame Material

1.8mm Galvanised Steel, 2.0mm Galvanised steel

Door Leaf Core

Mineral wool insulation

Acoustic Value

35dB, 38dB


4 Large stainless steel ball bearing hinges, 4 Stainless steel ball bearing hinges


Hooply handles (5586)

Locks or Door Furniture

Latham's trademark 19 point locking system


Heavy Duty Euro Profile Cylinder


Nylon self adhesive V-seal

Dog Bolts

4 Dog bolts


DDA (Disability Discrimination Act) compliant threshold

Jemmy Bar Lip

At door jam, hinge side & top, At door jam, hinge side & top. Superior ‘barb-like’ design


Fully welded construction

Security Type


CE Certification


Security Certification


Fire Rating Certification


Stock Product


Made to Measure Product


External or Internal Use

Suitable for external and internal use

Example Door Purposes

Recording Studios, Classrooms, Home & commercial offices, Schools & nurseries, Hospitals



How do I choose the hinge side and opening? (Handing)

Hinge side and opening is determined viewed from outside.
Example 1: LH hinge open out: hinges are on the LH side, handle is on the right and you pull the door towards you.
Example 2: RH hinge open in: hinges are on the RH side, handle is on the left and you push the door away from you.
See our handy illustration here

What is the lead time?

Stock Door (white, no modifications) – in stock – 0 days
Stock Door (white, modified e.g. installed accessories, vision panel e.t.c) – 4 working days
Re-Powder Coated Stock Door, with or without accessories installed (not white) – 10 working days
Fast track options are also available 

How many keys come with the door?

Personnel doors come with 3 usable keys
Additional keys are available – we have a key cutting machine on-site
See our cylinder options video here

How much do the steel doors weigh?

Budget doors weigh on average 40kg*
Security doors weigh on average 85kg*
High Security (Ultra) doors weigh on average 100kg*
Double doors weigh on average 110kg*
*size dependant

What are the door sizes? What is the clear opening?

The sizes listed are external frame sizes.
We offer side panels and over panels if you need to add to the width or height of the door. We also offer a cut down service to reduce the height of the door
To calculate the clear opening (when the door is open), subtract 110mm from the width dimension. E.G. 895mm-110mm=760mm clear opening
See the video on how to measure here

What is Security Trim?

The security trim kit fits around the perimeter of the door frame, preventing any packing from being seen externally and making the door as a whole more secure.
It hides un-level or large gaps, hides the position of fixings eliminating the risk of tampering from intruders and crucially protects the fixings from attack.
See the security trim video here

To see all FAQs, click here


Operation & Maintenance Manual

Download operation & maintenance manual

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