Technical

Whether a steel door rusts depends not on the door itself but on the surface treatment and the local air. Where rust starts and how it's stopped.

If the door catches while closing and the latch struggles to find its socket, the leaf has sagged. What causes sagging, and can adjustment fix it.

Rainwater getting in under the door isn't a gasket problem — more often than not it's a threshold and drainage problem. What does the right threshold setup look like?

A fire door is a certified product, and regulations make it mandatory in certain locations. Where does a detached house entrance stand, and how much resistance does a standard steel door actually offer?

Cold air coming from under the door is usually a problem with the gap and the threshold, not the door itself. Five points to check, in order.

How are fingerprint access, card entry, keypad panels and remote opening set up on a villa door? What happens during a power outage, and when should the wiring be prepared?

Installation is the stage that either brings out a door's quality or throws it away. What goes into removal, frame placement, alignment and filling?

Past a certain point, hinged systems struggle with wide, tall entrances. Where does the limit start — and what do you do once it's crossed?

Noise from the stairwell usually gets in around the edges of the door, not through its body. The four factors that determine sound insulation.

Standard sizes like 90x200 and 100x210 circulate in the market. Where do they come from, will they fit your entrance, and what happens when they don't?

Glass in a door is a balancing act between daylight and security. How does laminated glass strike that balance, and what should you look for when choosing a glazed section?

The RC classes in the EN 1627 standard define how long a door resists — and against which tools. What do the classes tell you, and which one makes sense for which home?

Fingerprint, card, and code access make a door more convenient. But smart access is a layer of convenience — it doesn't replace the security layer. Choose it knowing the difference.