What type of floor is ROCKWOOL Steprock ND intended for?

ROCKWOOL Steprock ND is designed for insulation of heavy floors under reinforced wet screeds. The manufacturer recommends it to reduce impact and airborne noise in intermediate floors, while also providing thermal insulation and fire protection. The board is part of a floating floor system; it is not a finished flooring and should not be left without the load-distributing layer.

What sizes and thicknesses of Steprock ND are available at LATIVA?

Steprock ND boards measure 1000 x 600 mm. In Shopify, thicknesses of 20, 30, 40, and 50 mm are listed, all marked "made to order." The official datasheet gives RD values of 0.50, 0.80, 1.05, and 1.35 m²K/W respectively. For quantity, the net floor area must be calculated, considering cutting, peripheral details, and chosen thickness.

How do the dynamic stiffness and compressibility of Steprock ND affect the floor?

Steprock ND has a declared dynamic stiffness of 15 MN/m³ and a compressibility class CP4. The manufacturer specifies the board for heavy floors under reinforced wet screeds and to reduce impact and airborne noise in intermediate floors. These two parameters characterize the insulation board but are not standalone values for the sound insulation of the entire floor. The final result is assessed for the complete floor assembly.

What compressive strength is declared for ROCKWOOL Steprock ND?

The technical datasheet states a compressive strength at 10% deformation of at least 20 kPa. This value is a product characteristic and does not mean that the insulation can directly support a final floor covering or concentrated load. The load must be distributed through a properly dimensioned reinforced wet screed, executed as part of the designed floor system.

What are the thermal conductivity and fire reaction class of Steprock ND?

Steprock ND has a declared thermal conductivity λD of 0.037 W/(m·K) and fire reaction class A1 according to EN 13501-1. The nominal density is 120 kg/m³, and the melting point is above 1000°C. These are characteristics of the board. The fire and thermal behavior of the floor assembly also depends on the board, screed, flooring, joints, and connections to walls.

Is Steprock ND suitable for partition walls or pitched roofs?

It is not the product specified by the technical datasheet for these applications. Steprock ND is a rigid floor board for heavy floors under wet screeds and has mechanical properties aimed at floating floors. For partition walls or pitched roofs, insulation whose purpose and installation scheme are declared for the respective structure should be chosen, rather than using density as the sole criterion.