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CDM-MAT is a continuous mat treatment that is used to float wet and dry floor constructions.
The following information is required for CDM to select the correct CDM-MAT product:
1 The type and weight of the floating floor
2 The imposed and dead loads
3 Any sound insulation and/or impact isolation specifications
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The correct CDM-MAT product will then be selected by CDM from the wide range of CDM elastomer materials available (CR, RC, RR, MF, PF) ¨C please refer to Material Data Sheets.
The most common types of CDM-MAT are:
1 CDM-MAT-RR ¨C this is a bobbly resin-bonded rubber product that comes in standard 10mm, 17mm and 20mm thicknesses (other thicknesses available on request)
2 CDM-MAT-RC ¨C this is usually used in 3mm thickness for basic de-coupling applications (other thicknesses available on request)
As an indication the following isolation improvements (between 100 and 500Hz) can be obtained when compared to the non-lated case:
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Thickness |
Impact noise |
Airborne noise |
3mm |
8-10dB |
6-10dB |
5mm |
12-15dB |
8-12dB |
10mm |
16-20dB |
11-15dB |
20mm |
20-25dB |
14-18dB |
CDM-PERIMETER-STRIP lateral isolation
Polythene waterproof membrane
CDM-MAT isolation layer |
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