DIY : What is a Composite Door and Why Should You Care? – ValueDoors UK – Medium

Composite Doors feature heavily insulated inner workings that provide the best insulation possible, far suppasing the likes of uPVC Doors and Wooden Doors. Value Doors use only CFC-Free, high density foam in their doors, making them excellently equipped to combat undesirable temperatures, whilst also being more enviro-friendly to manufacture.

Chlorofluorocarbon(CFC) is a gas that is released in foam and aerosol production that erodes the earth’s ozone layer. CFC-Free foam creates the same exact product without the use of the harmful gas.

The Wolverhampton Composite Door in Anthracite Grey — Available at

For Composite Doors that feature glazing, the performance of the glazed unit itself is crucial to its overall performance. Value Door’s use the same technolgy that they apply to their A-rated uPVC Windows on their Composite Doors. This gives them supreme insulating properties thanks to a number of features:

  • Argon Gas Insulation: This harmless, abundant gas prevents the transition of heated air between the panes of the double glazed unit.
  • Warm Edge Spacer Bar: This internal piece of hardware acts as a physical separation of the two panes of glass in the double glazed unit. It ensures that the cold from the exterior pane of glass cannot.
  • Low-E Glass: Low-E (Low emissivity) glass has a microscopically thin coating, no thicker than a human hair. This reflects UV (which hinders thermal efficiency) without affecting visible light passing through the glass.
  • Low U Value: The lower the U Value, the better the thermal retention capabilities of the glass in question. Value Doors’ glazed units have U Values of 1.6 or better, thus achieving an A-rating.


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