Royal Doors thermal standards

Modern front doors – thermal standards guide

Our modern front doors are available in 5 thermal standards. All are based on insulated steel door construction with a warm threshold, durable outer skin and a choice of frame type depending on the selected standard. After choosing the standard you like, these modern front doors can then be personalised in the configurator — glazing, colours, handles, accessories and more.

We recommend a thermal standard of 72 or above for better insulation, improved thermal comfort and everyday use.
55 mm, 72 mm and 90 mm leaf options
Metal/wood and aluminium frame versions
U-values shown by standard
Designed for easy customisation in the configurator
Swipe left to see more thermal standards →
55 mm
Standard 55

Metal/wood frame option with economical thermal performance.

U-value from 0.96 W/m²K
72 mm
Comfort 72

Popular premium-level standard with metal/wood frame.

U-value from 0.82 W/m²K
72 mm ALU
Comfort 72 ALU

Comfort 72 insulated leaf with aluminium frame version.

U-value from 0.83 W/m²K
90 mm
Premium 90

High-performance standard with metal/wood frame.

U-value from 0.61 W/m²K
90 mm ALU
Premium 90 ALU

Top thermal level with aluminium frame version.

U-value from 0.67 W/m²K
Standard 55 with a metal/wood frame
Economical standard

Standard 55 with a metal/wood frame

A solid everyday option for homes where a practical, reliable and economical entrance door is needed. This standard uses a 55 mm insulated leaf, warm threshold and metal/wood frame construction.

Thermal performance
Leaf thickness55 mm
Thermal valueU-value from 0.96 W/m²K
Glazing3 glass panes with warm frames
FrameMetal/wood frame
  • PUR foam insulated construction
  • Warm threshold in the bottom zone
  • Galvanized steel outer skin
  • Available with standard or upgraded lock options
Why we use PUR foam: PUR foam helps improve insulation, supports a stronger door leaf structure and fills the inside of the door evenly for better everyday performance.
Configurator: after selecting the standard, you can continue with glass, colours, handles, lock options and accessories.
Configure your door
Comfort 72 with a metal/wood frame
Popular premium level

Comfort 72 with a metal/wood frame

A balanced premium option for energy-efficient homes. Comfort 72 is one of the most versatile standards in the range, combining stronger insulation with a practical price level.

Thermal performance
Leaf thickness72 mm
Thermal valueU-value from 0.82 W/m²K
Glazing4 glass panes with warm frames
FrameMetal/wood frame
  • PUR foam insulated leaf
  • ABS-reinforced internal structure
  • Warm threshold and 3D hinges
  • More advanced lock choices available
Why we use PUR foam: PUR foam helps improve insulation, supports a stronger door leaf structure and fills the inside of the door evenly for better everyday performance.
Configurator: after selecting the standard, you can continue with glass, colours, handles, lock options and accessories.
Configure your door
Comfort 72 ALU with aluminium frame
72 mm aluminium frame version

Comfort 72 ALU with aluminium frame

The same Comfort 72 thermal concept, now paired with an aluminium frame version. A strong choice for customers who prefer the aluminium frame solution while staying within the 72 mm premium standard.

Thermal performance
Leaf thickness72 mm
Thermal valueU-value from 0.83 W/m²K
Glazing4 glass panes with warm frames
FrameAluminium frame
  • Multi-chamber aluminium frame construction
  • Insulated 72 mm leaf platform
  • Warm threshold and premium detailing
  • Designed for modern exterior door setups
Why we use PUR foam: PUR foam helps improve insulation, supports a stronger door leaf structure and fills the inside of the door evenly for better everyday performance.
Configurator: after selecting the standard, you can continue with glass, colours, handles, lock options and accessories.
Configure your door
Premium 90 with a metal/wood frame
High-performance standard

Premium 90 with a metal/wood frame

A high-insulation option with a thicker 90 mm leaf and a premium construction level. This standard is suited to projects where thermal performance is one of the main priorities.

Thermal performance
Leaf thickness90 mm
Thermal valueU-value from 0.61 W/m²K
Glazing4 glass panes with warm frames
FrameMetal/wood frame
  • 90 mm insulated leaf construction
  • Advanced sealing arrangement
  • Warm threshold and rigid structure
  • Premium lock options available
Why we use PUR foam: PUR foam helps improve insulation, supports a stronger door leaf structure and fills the inside of the door evenly for better everyday performance.
Configurator: after selecting the standard, you can continue with glass, colours, handles, lock options and accessories.
Configure your door
Premium 90 ALU with aluminium frame
Top thermal level with aluminium frame

Premium 90 ALU with aluminium frame

The top thermal level in the range, paired with an aluminium frame version. This option combines the thicker 90 mm leaf, premium insulation values and an aluminium frame finish.

Thermal performance
Leaf thickness90 mm
Thermal valueU-value from 0.67 W/m²K
Glazing4 glass panes with warm frames
FrameAluminium frame
  • High-performance insulated 90 mm leaf
  • Aluminium frame version
  • Premium sealing and threshold solution
  • Suitable for top-range configurations
Why we use PUR foam: PUR foam helps improve insulation, supports a stronger door leaf structure and fills the inside of the door evenly for better everyday performance.
Configurator: after selecting the standard, you can continue with glass, colours, handles, lock options and accessories.
Configure your door