Timber Double Doors in Hertfordshire

Not necessarily. A fixed slave leaf with flush bolts is more weathertight and cheaper; make both leaves working only if you will actually use the full width.

Slim-profile units down to around 11mm can, and they are frequently accepted where a chunky modern unit would not be. Some listed buildings still require single glazing.

Often. Conservation area status can remove permitted development rights for front elevations, and Article 4 directions tighten it further. Check with the local planning authority before ordering.

A three-panel door with a wide glazed head, often leaded in a sunburst or geometric pattern. The glazed area is proportionally larger than on a Victorian door.

Timber moves with humidity, which is why clearances, sealed end grain and a breathable finish matter. A door made to the correct moisture content and finished on all six faces stays workable through the seasons.

Engineered stiles are laminated from several sections with the grain alternated, so the door resists twisting far better than a solid section of the same size. Under paint it is the more stable choice.