Best Doors for a Kitchen Extension

If you cook and eat with the doors open in summer, prioritise the biggest clear opening — bi-folds win. If you look out at the garden most of the year with the doors closed, prioritise the closed-state view — sliding doors win. If you have young children who'll run in and out, a single access door alongside a fixed picture pane may be better than either.

3–4m openings suit either a 3-panel slider or a 3–4 panel bi-fold. 4m+ needs conversation with a structural engineer about the lintel or steel above. A 6m opening will need a substantial steel and 400–600mm depth of downstand — factor that into ceiling height planning.

For kitchen extensions with a solid roof, rooflights (fixed VELUX or lantern) usually deliver more effective daylight than very tall doors — light from above spreads further than light from the side. Combining medium-height doors (2.1m) with a lantern often looks better than 2.7m doors alone.

If you want tile-out-onto-patio continuity, specify a level-threshold system with an external drainage channel. Coordinate with the tile fitter early — the tile substrate levels and the drainage channel depth need to be planned together, not resolved on site.

Ordering doors before the structural steel is confirmed (leads to remade doors), specifying dark colours on south-facing elevations without solar-control glass (leads to overheating), and omitting a traffic door on a bi-fold set (leads to daily annoyance). All three are common and all three are avoidable with a proper design conversation.