Is EN 520 Type D the same as an acoustic board?

Type D means a controlled, higher density — and density is the property that does acoustic work, so acoustic boards are Type D. But Type D also appears on dense fire and shaft boards, so “Type D” means dense, not necessarily marketed-as-acoustic.

Why do two equivalent boards show different type letters?

Usually just a labelling difference: one manufacturer prints baseline Type A in the string and another omits it. “A, D & F” and “D & F” can describe the same real performance once the baseline A is neutralised.

What is the difference between EN 520 and EN 14190?

EN 520 covers paper-faced gypsum plasterboard. EN 14190 covers processed boards that have been given an added backing or treatment — a foil vapour-control laminate, for instance. A board can reference both.

Does matching the EN 520 type make a board a valid substitute in a fire-rated wall?

Not on its own. The type letter is a board property; a fire-rated wall’s performance in minutes belongs to the tested system. Matching the classification is necessary but not sufficient — the system’s test evidence still governs.

EN 520 board types explained

What do EN 520 Type A, D, E, F, H, I, P and R mean?

EN 520 classifies plasterboard by type letter — Type A is standard wallboard; D is controlled higher density (acoustic), F improved fire performance, H moisture resistance. Processed boards with a backing (e.g. Duplex vapour-control) fall under EN 14190 instead. Matching the classification matters for a like-for-like substitution.

EN 520 is the harmonised European standard — “Gypsum plasterboards: definitions, requirements and test methods” — that paper-faced plasterboard is CE/UKCA marked against in the UK. The type letters on a data sheet are not marketing names: each one points to a defined property measured by a defined test, which is exactly why they are the currency of a like-for-like substitution.

The type letters, one by one

Each letter marks a property the board has been shown to meet. A board can carry several at once, and most performance boards do.

Type A — standard wallboard. The general-purpose board for lined walls and ceilings in dry areas.
Type D — controlled, higher density. Density is the trade’s mass signal, so denser boards do more acoustic and, combined with other types, fire work.
Type E — gypsum sheathing board, made for use as external sheathing behind cladding and rainscreens.
Type F — improved core cohesion at high temperature. Glass-fibre and additives hold the core together as it is heated, which is the board’s contribution to a fire-rated system.
Type H — reduced water absorption (classes H1, H2, H3). Water-repellent additives in the core for intermittent humidity; H1 is the strongest claim.
Type I — enhanced surface hardness, i.e. impact resistance, for circulation and high-traffic areas such as schools and hospitals.
Type P — a plaster baseboard, whose face is made to receive a coat of gypsum plaster rather than direct decoration.
Type R — enhanced strength in both directions, for spans and situations that ask more of the board mechanically.

Processed boards with an added backing — for example a foil-laminated vapour-control (Duplex) board — sit under EN 14190 instead of, or alongside, EN 520; glass-mat wet-area boards are marked to EN 15283-1. The marked standard is what a specification should be read against.

Reading a multi-type declaration

A single string like “EN 520 Type D, F & H1” describes one board that is higher-density, fire-improved and moisture-resistant at the same time. The order the letters appear in follows the manufacturer’s own data sheet, not a fixed hierarchy.

Labelling conventions vary, and this trips people up. Some manufacturers print baseline Type A in every declaration; others print only the types beyond A. So two genuinely equivalent boards can carry different-looking strings — one reading “A, D, F & I” and another “D, F & I” for the same real performance. Neutralising that baseline is part of judging a like-for-like swap, not evidence the boards differ.

Why the classification decides a substitution

When a specification says “or equivalent”, the defensible reading is a board that meets every type the specified board declares, in the same dimensions, and adds nothing that changes its identity. A moisture class may be matched or bettered (H1 covers a spec asking for H2), but a plaster baseboard, a foil-backed vapour board and a glass-mat board are different products, never silent upgrades for one another.

This is why drywallDB compares on the declared classification first, states every matched and differing type, and versions the rules that decided it — so the equivalence can be defended to a specifier rather than taken on trust.

Frequently asked questions

Is EN 520 Type D the same as an acoustic board?: Type D means a controlled, higher density — and density is the property that does acoustic work, so acoustic boards are Type D. But Type D also appears on dense fire and shaft boards, so “Type D” means dense, not necessarily marketed-as-acoustic.
Why do two equivalent boards show different type letters?: Usually just a labelling difference: one manufacturer prints baseline Type A in the string and another omits it. “A, D & F” and “D & F” can describe the same real performance once the baseline A is neutralised.
What is the difference between EN 520 and EN 14190?: EN 520 covers paper-faced gypsum plasterboard. EN 14190 covers processed boards that have been given an added backing or treatment — a foil vapour-control laminate, for instance. A board can reference both.
Does matching the EN 520 type make a board a valid substitute in a fire-rated wall?: Not on its own. The type letter is a board property; a fire-rated wall’s performance in minutes belongs to the tested system. Matching the classification is necessary but not sufficient — the system’s test evidence still governs.

Related guides

Moisture resistance: H1, H2 and H3 — What's the difference between H1 and H2 plasterboard?
Reaction to fire vs fire resistance — Are 'A2-s1, d0' and '60 minutes' the same kind of fire rating?
Vapour-control (foil-backed) boards — What does a foil backing on plasterboard actually do?

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