Insulation

Acusticab vs Absorbell PU

Advanteges of Absorbell PU (Caldic) over Acusticab (Merford) conform Caldic:

• better price
• better resistance against aging
• with glue layer: panel can be relocated within 10 minutes

Acusticab has a structured surface, Absorbell is smooth, both are CE approved

Floors and walls

Because in general floors and walls are of a light material (plywood)which easy transfers sound, their mass should be increased by gluing a rubber mat against them. An alternative is to use a sandwich panel which has a rubber mat glued between the plywood layers. The last is a more costly solution.

Air transfers sound very easy so air voids should be avoided, fill spaces with wool or foam. If several layers are required and the demands for sound insulation are high than an additional rubber mat can be applied between the layers of foam/wool. Make sure the rubber mat has a different thickness than the rubber mat on the wall/floor.

An exception is a floor supported by Sylomer strips. Here there should remain a gap between the wool/foam and the floor because otherwise it will transfer the sound to the floor and the Sylomer will be redundant.

Use wool with a density of 60-80 kg/m3.

Ceilings

Caldic has floorhangers with a Sylomer layer.

Vibradamp

Vibradamp and similar products have only effect within a limited temperature range. Temperatures above 30 degrees must be avoided because the Vibradamp will be without effect.

Stack

The interior side of a stack (casing for dry exhaust pipes) must be lined with wool of at least 40mm to make sure the casing will not get warmer than hand warm.

Melamine foam

This foam has a very high temperature resistance compared with PU based foam.