What is Worm-Pattern Ceiling? Why do people call it this and what options are available from Trandar AMF

What is "Worm-Pattern Ceiling"? Why do people call it this and what options are available from Trandar AMF?

"Worm-pattern ceiling, dot-pattern ceiling" are informal names for Mineral Fiber acoustic ceilings, which feature a surface with meandering lines resembling worm tracks. This type of ceiling is commonly seen in offices, schools, and hospitals. Currently, Trandar AMF offers 5 models: Mercure, Fine Fresko, Star, Fine Stratos Micro Perforated, and Thermofon. All models are 15 mm thick with NRC ratings ranging from 0.60 to 0.80, and can be installed on T-Bar systems in both 600×600 and 600×1200 mm sizes.

What is a "Worm-Pattern Ceiling"?

If you look up at the ceiling of an old office, classroom, or hospital, you will see white ceiling panels arranged in a grid with short, meandering lines scattered across the surface. Thais refer to this type of ceiling as "Worm-pattern ceiling"

This is not an official name. The technical term for the material is Mineral Fiber acoustic ceiling, which is a porous material that helps absorb sound, reduce echo, and resist heat, designed for installation on T-Bar framing systems.

Why do people call it "worm pattern"?

Named for what is seen: The pattern consists of short, meandering lines that look similar to worm tracks, so people named it after its visual appearance.
It is the most commonly seen ceiling: Almost every office building features this type of ceiling, so people outside the material industry are unfamiliar with the technical name.
The term is easy to remember and search for: When contractors, office owners, or homeowners want the same type of ceiling, they usually type "worm-pattern ceiling" instead of Mineral Fiber.

What is the function of fissured acoustic ceilings?

This type of ceiling is not just for aesthetics; its main functions are:

Absorbing echo and reverberation, helping speech to be heard more clearly in meeting rooms, classrooms, and open-plan offices.
Flame retardant, providing up to 60 minutes of fire resistance with the appropriate installation system.
High humidity resistance (RH 99%), preventing sagging or deformation in hot and humid climates like ours.
Light reflectance, brightening rooms and reducing lighting loads.

From Fissured Ceilings to all 5 Trandar AMF Models

Mineral fiber ceilings have come a long way. Trandar AMF offers 5 models, each with different surface textures and properties.

Model	Surface Texture	NRC	CAC	Light Reflectance	Weight
AMF Mercure	Fine texture with slight perforation, elegant and dimensional	0.60	36 dB	90%	3.33 kg/sq.m.
AMF Fine Fresko	Extra fine texture resembling smooth plastered cement, offering a delicate and natural feel	0.60	36 dB	87%	3.33 kg/sq.m.
AMF Star	Fine texture with evenly distributed small dots, looking light and easy on the eyes	0.60	36 dB	90%	3.33 kg/sq.m.
AMF Fine Stratos Micro Perforated	Sandy texture with subtle micro-perforations distributed across the surface	0.60	36 dB	90%	3.33 kg/sq.m.
AMF Thermofon	Dense and smooth, with a tactile feel resembling marble or fine polished cement	0.80	28 dB	88%	2.4 kg/sq.m.

Features common to all models

Thickness 15 mm (weight excludes suspension system)
White color, equivalent to RAL 9010
Standard sizes 600×600 and 600×1200 mm
Compatible with Trandar T-Bar suspension systems
Fire retardant (BS 476 parts 6-7) and 60-minute fire-resistant (BS 476 parts 20-23) in appropriate installation systems
Humidity resistant up to RH 99%
Manufactured from partially recycled materials, LEED and ISO 14001 certified as specified on the product page
NRC in accordance with ASTM C 423 standards

Thermal conductivity: Star, Fine Fresko, and Fine Stratos range from 0.052–0.057 W/mK (DIN 52612), while Thermofon ranges from 0.038–0.057 W/mK (EN 12667)

What is Worm-Pattern Ceiling? Why do people call it this and what options are available from Trandar AMF

Which model should you choose?

Looking for the best acoustic absorption ceiling? Choose Thermofon with an NRC of 0.80, the highest in the range, ideal for areas where echo is a major issue.
Want a clean, smooth surface? Choose Fine Fresko or Star depending on your preferred texture.
Want a dimensional pattern? Choose Mercure or Fine Stratos

All models are suitable for office buildings, shopping malls, hotels, hospitals, and educational institutions.

How to effectively use fissured acoustic ceilings

Identify the room's issue first—such as echo within the room or noise from adjacent rooms.
Choose a surface texture that matches your design. All models are white, differing only in surface patterns.
Use compatible T-Bar suspension systems for a clean installation and easy maintenance.
Consult our team for an assessment, especially for spaces requiring strict reverberation control, such as large conference rooms or classrooms.

Looking for fissured acoustic ceilings for an office, school, or meeting room, but not sure which model suits your space? Chat with the Trandar Acoustics team. Tell us your room type and acoustic issues, and we'll help you choose.