How Long Can a Front Door Hold? European Standard Puts a Number on Burglary Resistance
Published on 09/07/2026 at 01:01 | Editorial boerse-global.de
When a would-be intruder sets to work on a front door with a crowbar or drill, the clock starts ticking. The question is how much time the door can buy — and a lesser-known European standard, EN 1627, exists precisely to answer that.
The framework sorts doors into resistance classes, from RC1 to RC6. At the low end, RC1 assumes a protection time of roughly one minute. At the top, RC6 suggests a door can hold off an attacker for about 20 minutes. For most private homes, manufacturers generally steer customers toward RC2 or RC3 as a sensible middle ground.
German door maker TEHNi has had its aluminium entrance doors certified by European institutes under this standard, with models reaching up to class RC3. The certification process is not a single test but a battery of them. Static strength is checked under EN 1628, dynamic impact resistance under EN 1629, and resistance to manual break-in attempts under EN 1630.
What many homeowners overlook is that the door leaf is only part of the equation. Glazing plays an outsized role in overall security and must meet its own certification standard, EN 356. TEHNi uses laminated safety glass in double or triple layers, each pane 6 mm thick, which allows the finished product to reach security class P5A. Beyond thwarting intruders, the laminated construction adds structural rigidity to the entire entrance unit.
Security is not the only performance metric that matters for modern entry doors, though. Thermal insulation values, expressed as Uw coefficients, determine how well a door performs in an energy-efficient building envelope. TEHNi's aluminium models achieve Uw values as low as 0.76, according to technical specifications.
Air permeability is another factor that gets classified under a separate standard, EN 12207, which sorts tightness into classes 0 through 4. Contemporary building practice aims for classes 3 or 4 to cut energy losses and keep draughts out. Aluminium itself brings advantages here: the material resists weathering, needs little upkeep, and remains stable even when door wings are built to large dimensions.
The company's product range includes glazing options that go beyond safety, from conventional double and triple insulation to specialised variants for soundproofing, solar control, or low-emissivity coatings. The combination of certified hardware, laminated glass, and thermally efficient frames points to a broader trend in residential construction: entrance doors are increasingly engineered as multi-functional components that balance protection, comfort, and energy performance in one package.
