Technical Library

Doorsmar Blog

Engineer's-eye guides on fire safety, acoustics and certification.

What is a fire door, where is it required, what drives its price? Everything to know before you buy, in one guide.

Global audit data is striking: three in four fire doors fail to meet standards. The faults that devalue your door — and the fix.

The dB scale is logarithmic: a 10 dB difference means ten times the sound pressure. The system logic behind acoustic door selection.

One door, three test worlds: UL, EN and BS. A door shipped with the wrong certificate gets rejected on site — a short guide to choosing right.

The real threat is usually invisible: smoke. Why does EI need a separate S class beside it, and which details make the difference?

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