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Moisture control and noise levels are two of the major and recurring issues surrounding floating timber floors, impacting on their performance across many residential and commercial environments.
Dunlop Acoustic Underlay for timber floors has gone through extensive testing by the CSIRO to determine the acoustic performance and compliance with the standard set by the BCA.  Dunlop's timber flooring underlay Is all exceed the standard.

Dunlop timber flooring underlays are Australian Made and guaranteed for the life of the flooring. 
Dunlop Thermacoustic underlay has a special design to offer an increased reduction in sound transfer whilst also providing added moisture and thermal protection.  It is recommended with most common laminate and engineered timber floating floors where superior acoustic, moisture and thermal protection is required.

Thickness: 3  + / - 0.3 mm
Foam:  Closed Cell Polyethylene (Blue)
Laminate: Silver Metalised Polyester Laminate 40 μm
Place of Manufacture: Australia
Roll Length: 50 m
Roll Width: 1.2 m
Roll Size: 60 m2
Moisture Barrier: Yes
Weight per Roll: 8.0 kg
Poly-Wrap: Thermacoustic Clear Wrap & Printed Blue Polyethylene
Impact sound rating Ln,w + C159 dB
BCA Compliant: Yes
Dunlop Thermacoustic conforms to the standard AS ISO 717.2-2004 & BCA 2010 Spec F5.2 set by the Building Code of Australia (BCA) for acoustic performance Ln,w + C1 = 62 dB.  
Please Note: Bare Slab Ln,w + C1 result was 68 dB.  Testing was conducted in accordance with standard ISO 140-6, over a 150 mm reinforced concrete sub-floor.

The terms to describe the impact sound insulation of the floor is the "weighted normalised impact sound pressure level" (Ln,w) plus the "spectrum adaptation" (C1).  The lower the Ln,w + C1 for the flooring assembly, the better the performance of the floor in terms of impact sound insulation.



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