PU Acoustic Underlay Board 15 mm — 100 × 200 cm, 200 kg/m³

The 15 mm composite polyurethane (PU) acoustic underlay board — 100 × 200 cm, 200 kg/m³, around 3 kg/m² — is the standard-project thickness of the range, between the 10 mm and 20 mm formats. It absorbs sound from 50 Hz, carries 50% more mass per square metre than the 10 mm board while adding only 5 mm of height, and covers 2 m² per board. Priced at 32 EUR excluding VAT per m2, with volume discounts on quotation.

Where the 15 mm thickness fits

In renovation work the limiting factor is rarely acoustics — it is geometry. Every millimetre of underlay reduces the clearance under doors and raises thresholds. The 10 mm board passes almost everywhere; the 15 mm board still fits in most cases, since a standard door usually leaves 5 to 20 mm of clearance, while delivering noticeably better attenuation. Beyond 15 mm, a door-by-door check becomes necessary. That is precisely this board’s position: for projects where 10 mm is no longer enough acoustically but 20 mm would cost too much height.

• Density 200 kg/m³ — approximately 3 kg/m² at 15 mm
• Acoustic absorption from 50 Hz, effective on impact noise
• Hypoallergenic, mould-resistant and antibacterial foam
• Anti-slip surface; cuts cleanly with a utility knife and metal rule
• 100 × 200 cm format — 2 m² covered per board

Applications: building, industry, shooting ranges

Under floor coverings in renovation and new construction, the 15 mm board treats footfall and impact noise in residential and office buildings. On walls, fitted behind plasterboard or panelling, it reduces transmission between rooms. In industrial areas it is laid under machines with moderate vibration — small compressors, fans, technical office equipment — to cut vibration transfer to slab and walls. In shooting ranges it contributes to an overall acoustic treatment by partially reducing reflections on floors and walls; heavier duties call for the thicker boards of the same range.

Specifications

What to check before ordering

Measure the clearance under every door in the area before choosing 15 mm over 10 mm in a renovation. Check your floating-floor system’s tolerances: most click-system manufacturers specify underlays of 2 to 5 mm, so validate compatibility — poured screeds and raised floors pose no problem. On concrete in contact with the ground, or in basements, lay a 150-micron PE vapour barrier first: PU foam is not a vapour barrier. Finally, allow a 5 to 10% cutting margin — for 40 m² net, order 22 boards rather than 20.

Frequently asked questions

Does 5 mm more really make a difference versus the 10 mm board?

Yes, through surface mass: roughly 2 kg/m² at 10 mm versus 3 kg/m² at 15 mm — 50% more. In acoustics, added mass means less energy transmitted to the structure, particularly on impact noise and low-frequency vibration from 50 Hz.

Is it compatible with underfloor heating?

Yes. The PU foam withstands normal underfloor-heating operating temperatures. At 15 mm its thermal resistance is higher than the 10 mm board, which can slightly reduce heating efficiency — if thermal performance is the priority, choose 10 mm; if acoustics come first, 15 mm remains compatible. Check your heating manufacturer’s recommendations in case of doubt.

What budget for a 50 m² floor?

50 m² equals 25 boards, or 27 with an 8% cutting margin. For an exact figure including walls and the volume discount applicable to your project, send the total surface to be treated with your quote request.

For a measured quotation — surfaces, cutting margin and volume pricing — send your project details to the Light In Fitness team; quotes are free and returned within 24 to 72 hours.