Modular building steel door


From £199.00

Suitable for applications where weight is essential, our modular building steel doors offer durability and strength at only 47 kg!

Kirncroft modular building steel doors have a fully galvanised steel construction and come fully finished. In addition, the integrated cloaking frame gives a 30mm rebate to the top and sides of the door frame, facilitating quick and simple fitting into modular wall panels.

With a 1mm galvanised steel subframe and Kirncroft heavy-duty hardware as standard, a lightweight door needn’t be light on quality.

Frame size – 910x2065mm


Lead Times

  • Stock door – 2 days + delivery



Light on weight. Heavy on quality.

Our modular building door weighs only 47kg. However, it still features a 1mm galvanised steel subframe, a stainless steel threshold, Kirncroft heavy-duty hinges, and a Kirncroft high-security mortice lock and cylinder.


Designed for applications where weight is an essential factor.

Designed with tolerances that allow for “racking”, our modular building steel doors are suitable for timber framed units, towed units, cabins and other lightweight structures.


Powder-coat finish.

Our modular building doors are available in stock with a white powder-coat finish.


Integrated cloaking frame.

With an integrated cloaking frame that gives a 30mm overlap on the outer face, Kirncroft modular building steel doors automatically make-up to flat panel units.


High-security locking system.

Having been subjected to over 20 years of real-world development, you can be sure that our custom mortice lock will perform when it matters.


“Better than 1*” Kitemarked lock cylinder as standard.

We tested a 1* Kitemarked cylinder in-house, and we felt it wasn’t good enough, so we made some improvements.


Two-year warranty.

We offer a two-year warranty as standard.


Door skin steel0.8mm galvanised steel
Door frame steel1.2mm galvanised steel
Frame threshold1.7mm 304 grade stainless steel - Part M disability compliant
Door leaf subframe1mm galvanised steel
Door frame depth90mm
Door leaf depth45mm
Hinges304 grade stainless steel ball bearing hinges
Hinge fixing plate5mm thick anodised steel
Locking systemKirncroft custom specification mortice lock
Lock cylinderKirncroft customised 1* kite-mark equivalent anti-drill euro cylinder
Lock reinforcing2mm galvanised steel reinforcing box
Lock face plates304 grade galvanised steel
Lock keep plates304 grade stainless steel
Handles304 grade stainless steel "return to door" handles
Door insulationBonded honeycomb insulation
Hydraulic closer reinforcing2mm galvanised steel plate

Size Details

Frame size (mm)Internal size (mm)Clear opening at 90° (mm)Cloaking frame size (mm)

Frame depth – 90mm


Stainless steel lever handles100N operating force for 200,000 cycles & high corrosion resistance
Stainless steel hinges200,000 cycles & high corrosion resistance






Fitting instructions

Kirncroft door fitting instructions


Door frame fixing hole positions



Technical diagram

Modular door technical diagram

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