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Polythene-Encapsulated Glass Fibre Pad

Product Description

This document provides technical details for polythene-encapsulated glass fibre pads, including thermal, acoustic, and dimensional specifications.

A glass mineral wool pad fully enclosed in polythene for use in acoustic and thermal insulation applications, typically above suspended ceilings to improve sound attenuation and thermal resistance.

Key Features & Benefits

  • High thermal and acoustic performance
  • Polythene encapsulation prevents fibre migration
  • Optional adhesive bonding for vertical stability
  • Available in a range of sizes and thicknesses

Thermal Performance

Thermal conductivity (λ): ~0.035 W/m·K
Thermal resistance (R-value) depends on thickness:

  • 60 mm → R = 1.36 m²·K/W
  • 80 mm → R = 1.81 m²·K/W
  • 100 mm → R = 2.27 m²·K/W
  • 150 mm → R = 3.40 m²·K/W
  • 200 mm → R = 4.54 m²·K/W
  • 250 mm → R = 5.68 m²·K/W
  • 270 mm → R = 6.13 m²·K/W
  • 300 mm → R = 6.81 m²·K/W

Acoustic Performance

Pads manufactured with 10–12 kg/m³ glass wool provide high broadband sound absorption, particularly in the mid–high frequency range (500–4000 Hz) where speech clarity is most critical. Thicker pads offer improved low-frequency control, especially when installed over an air gap.The polythene encapsulation contains fibres without significantly reducing acoustic performance. Based on similar density glass wool products:

  • 125 Hz: ~0.50–0.70 α
  • 250 Hz: ~0.90–1.05 α
  • 500–4000 Hz: 1.00+ α
  • NRC: ~1.00–1.10

This performance reduces reverberation, improves speech intelligibility, and limits flanking sound transmission through ceiling voids.

Size & Pricing/packing Matrix

Other sizes available on enquiry.

Size (mm) Thickness (mm) Pack Qty Pallet Qty
600 X 600 50MM 30 600
600 X 600 100MM 20 400
600 X 600 150MM 15 300
600 X 600 200MM 15 240
600 X 600 250MM 15 240
600 X 600 300MM 10 200
1200 X 600 50MM 20 400
1200 X 600 100MM 15 200
1200 X 600 150MM 10 200
1200 X 600 200MM 10 160
1200 X 600 250MM 10 160
1200 X 600 300MM 10 100
 

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