Collection: French Doors

French doors can be highly thermally efficient when specified with triple glazing, warm-edge spacer bars, robust seals, and thermally efficient timber or alu-clad timber frames.

Whole-door Ud values below 0.80 W/m²K are achievable in the Norrsken Passive House range, meeting the Passive House Institute's threshold.

Both configurations are available and each has practical advantages.

Outward-opening French doors clear the internal floor space entirely but require external clearance and are more exposed to weather during use.

Inward-opening designs are more practical in exposed locations, easier to clean, and allow larger sash sizes, but require clear internal floor space when fully open.

Yes. Norrsken French doors – fully glazed or partially glazed – are also available as a single door for narrower openings.

Single glazed doors are a useful choice where the full width of a double set is not required but the glazed aesthetic is preferred over a panel entrance door.

Sliding and lift-and-slide doors perform similarly to French doors, depending on the configuration and opening style.

A triple glazed inward or outward-opening Norrsken French door achieves typical U-values of 0.76 W/m²K, while an inline sliding door can achieve U-values as low as 0.72 W/m²K. For high-performance builds with strict airtightness targets, both French doors and sliding doors are suitable.

Yes. Norrsken's French doors are available in both all-timber and alu-clad timber configurations. Alu-clad provides a powder-coated aluminium exterior in any RAL colour with a timber interior and requires no external repainting. All-timber is available where natural external finishes are preferred or required by planning.

Yes, depending on the specification. French doors with whole-door Ud values at or below 1.4 W/m²K meet current Building Regulations Part L requirements for replacement doors in England.

For new builds, the door's Ud value contributes to the overall SAP energy model – the notional recommended U-value is 1.2 W/m²K or lower for new builds under the Future Homes Standard recommendations.

Norrsken's triple-glazed French doors achieve typical Ud values below 0.80 W/m²K – well below this threshold.