HDHMR, HDF and MDF Boards

HDHMR Boards for Acoustic Finishes

Once SoundBlanket® MLV, BassBloc®, PET felt panels and other acoustic layers are installed, every project needs a final finished surface that is stable, durable and visually clean. HDHMR is that layer, and the substrate under slat, fluted and perforated acoustic panels.

12 / 15 / 16 / 18 mmstandard thickness
8 to 24 mmproject-wise
2440 x 1220 mmboard size, ±5%
150+ shadespre-laminated Century®
E1EN 13986 formaldehyde
FR gradeon request
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Applications

Where HDHMR boards are used

Recording and mix studios

Finish layer over concealed acoustic build-ups.

Home theatres and clubs

Plain, laminated or grooved wall finish.

Corporate offices

Laminated boards on partitions and boardrooms.

Also used in

  • Auditoriums and hospitality venuesGrooved or plain cladding over wall linings.
  • Institutional corridors and lobbiesDurable, moisture-resistant surfaces.

In the system

Where HDHMR sits in the build-up

Home theatre or studio wall

Base wall, SoundBlanket® MLV, BassBloc® 20 or 40 mm, service framework, HDHMR panel finish.

Office or boardroom partition

Metal stud partition, insulation, SoundBlanket® (selective layers), PET felt or BassBloc®, HDHMR laminated boards on both sides.

Auditorium and hospitality wall lining

Base masonry or stud, SoundBlanket®, BassBloc®, optional PET panels or wood wool, grooved or plain HDHMR cladding.

Perfect conceal layer

Covers SoundBlanket®, BassBloc®, PET and insulation systems while maintaining access to services, openings and electrical layouts.

150+ pre-laminated shades

Century® decorative laminates and textures in wood, solid and abstract designs.

Machinable and stable

Moisture resistant, better screw holding than standard MDF, and suited to CNC routing and grooving.

Specifications

Technical data

ManufacturerMMTPL, Palwal plant, Haryana, India
MaterialHigh-density high-moisture-resistant (HDHMR) fibreboard; HDF and MDF also supplied
UseSubstrate for slat, fluted and perforated acoustic panels; final finish over acoustic layers
Standard thickness12 mm, 15 mm, 16 mm, 18 mm
Project thickness8 mm to 24 mm, project-wise
Standard board size2440 x 1220 mm
Size tolerance±5%
Fire ratingFR grade available on request
Formaldehyde classEN 13986: E1
PropertiesMoisture resistant, screw holding, suitable for CNC machining
Finish optionsRaw paintable, one-side laminated, both-side laminated
Decor range150+ pre-laminated Century® shades in wood, solid and abstract designs
Country of originIndia

Soundproofing: the fix for every sound problem

3-layer soundproofing

  1. 1

    Layer 1: SoundBlanket® MLV

    The dense barrier that isolates sound and stops it passing through walls, ceilings and floors.

  2. 2

    Layer 2: BassBloc®

    High-density sound absorber over the MLV that controls low-frequency noise.

  3. 3

    Layer 3: Echsorbix®, SoundaXe® or WDWL®

    The final acoustic finish: Echsorbix® PET felt, SoundaXe® wooden acoustics or WDWL® wood wool panels.

Layer 2 can also be covered with gypsum or cement board before adding the final acoustic layer.

Different thickness in each layer will give different STC and NRC levels.

3-layer soundproofing: SoundBlanket MLV, BassBloc and acoustic finish panel build-up

Custom and project supply

Grooving, thickness and finish to design

Groove depth, spacing and pattern are customised as per design. Thicknesses from 8 mm to 24 mm are available project-wise, and fire-rated boards can be specified on demand. Share your room sizes and drawings and our technical sales team will suggest the build-up and board thickness.

Talk to the OEM desk

FAQs

Questions about HDHMR boards

Are HDHMR panels themselves acoustic, or do they only act as a finish?
HDHMR, HDF and MDF panels are mainly structural and visual finish materials. They provide a smooth, durable surface and can contribute some damping, but the main acoustic performance comes from what is installed behind them, such as SoundBlanket® MLV, BassBloc®, PET felt panels and insulation layers.
Why do you recommend only Century® MDF, HDF, HDHMR and plywood?
We promote and work with Century® substrates because they offer consistent quality, density, bonding and dimensional stability, all critical when boards are used as the final skin over multi-layer acoustic systems. This reduces the risk of warping, delamination and surface defects over time.
What thickness should we choose for different applications?
For typical wall panelling, 12 to 16 mm works well. For robust areas, doors or partitions, 18 to 24 mm may be recommended. Thinner boards like 8 mm are used in specific design details or as secondary layers. Final thickness is always decided based on acoustic build-up, framing and design loads.
Are fire-rated HDHMR / MDF boards available for auditoriums and public buildings?
Yes. Fire-rated boards can be specified on demand for projects where the consultant, code or authority requires enhanced fire performance. We coordinate the substrate selection with your project team and support with relevant documentation.
Can HDHMR panels be used with grooved or patterned designs?
Yes. HDHMR and MDF are ideal for CNC routing and grooving. Many projects combine concealed SoundBlanket® and BassBloc® systems behind grooved wooden panels to achieve both aesthetics and tuned acoustic behaviour. Groove depth, spacing and pattern are customised as per design.
How is the HDHMR layer fixed over SoundBlanket® and BassBloc®?
Typically, acoustic layers are fixed on the structural wall or framing. A secondary framework (wood or metal) is created to carry the HDHMR boards, ensuring that screws and fasteners do not create unnecessary sound bridges. We share recommended fixing details and sections as part of the system design.
Can local carpenters install these panels, or do we need a specialist team?
Most HDHMR installations can be carried out by experienced local carpenters, provided they follow the acoustic system drawings and fixing instructions. Our role is to make the build-up simple, logical and compatible with standard site tools, so that your local teams can execute smoothly.
How do we start specifying HDHMR panels for our project?
You can share your room sizes, drawings and the type of space (studio, home theatre, auditorium, office, etc.) through the Get a Quote page. Our technical sales team will suggest acoustic build-ups + HDHMR panel thickness, along with guidance on finishes and coordination with your architect or interior designer.
What is an HDHMR board?
High-density high-moisture-resistant fibreboard. It is denser than MDF and holds screws and CNC detail better, which is why it is used as the substrate under slat, fluted and perforated acoustic panels.
Who manufactures HDHMR acoustic substrates in India?
MMTPL (Mahabir Multi Tech Private Limited) manufactures it at its Palwal plant in Haryana, India, and supplies architects, interior designers and turnkey contractors in India and 25+ export markets.
What thicknesses and sizes are available?
12, 15, 16 and 18 mm on a 2440 x 1220 mm board, plus or minus 5%.
Is HDHMR fire rated?
An FR grade is available on request. The board is EN 13986 E1 for formaldehyde emission.
Why use HDHMR instead of MDF for acoustic panels?
Moisture resistance and screw holding. MDF swells and loses grip in humid conditions; HDHMR keeps its dimension, which matters when a slat panel is machined to a tolerance and fixed to a channel.