SELITAC® 3 mm – SELIT Dämmtechnik GmbH

SELITAC® 3 mm

The underlay that helps you be a good neighbour
Being loud is a thing of the past. SELITAC® 3 mm significantly reduces impact sound and walking sound. In this way, it ensures a noticeably higher level of living comfort and allows people to live together in harmony in rented properties. The underlay also protects your floor from damage caused by heavy loads and falling objects.

Polystyrene foam with high level of compressive strength - ideal for rooms with poor soundproofing

High load-bearing capacity
Efficient protection against falling objects
Very good impact sound reduction

Order number	70688
Thickness	3 mm
Dimensions	1.25 x 8.5 m
Package contents	10.63 m²

Why SELITAC® 3 mm

Easy to process

Easy to install
as a folding panel

Secure connection
with click system

Easy to cut
due to printed grid

Protects the floor from damage

Protection against
loads and use

Protection against
falling objects

Protection in
uneven areas

Increases living comfort

Reduction of
walking sound

Reduction of
impact sound

Thermal insulation
for cold floors

Installing SELITAC® 3 mm –

a step-by-step guide

Before installation, please note: Check the base in accordance with CEN/TS 14472 and ensure that the quality of the base is suitable for proper processing. In general, the base should be clean, level, dry, resistant to tension and compression and should not contain any substances such as plasticisers, solvents or other diffusing substances. It must be ensured that the base is in a state of equilibrium humidity and that the CM value is below 2.0% (for cement screed) or below 0.5% (for anhydrite screed and anhydrite flowing screed). The processing instructions of the flooring manufacturer are to be observed as binding specifications.

Cleaning the surface

Step 1
Clean the surface thoroughly with a brush or vacuum cleaner. Remove any adhesive and paint residues completely.

Applying the moisture protection

Step 2
Mineral bases need protection against rising moisture. Cover the room completely with SELITstop® Comfort Vapour Barrier. Allow the joints to overlap by approx. 5 cm and seal them in a vapour-tight manner with SELITstop® Aluminium-Foil Sealing Tape.

Masking the wall connection area

Step 3
In the wall connection area, place the film in a trough-like position at approx. 3-4 cm to protect against moisture and fix to the wall with SELITstop® Aluminium-Foil Sealing Tape. Alternatively, use SELITstop® Moulding Protection Belt. In this case, install the moisture protection film flush with the wall.

Laying out the first panel

Step 4
Lay the first panel of the underlay flush with the wall over the entire width of the room with the cutting grid facing upwards.

Installing the flooring

Step 5
Lay the flooring in the same orientation as the underlay. Do not place any weight on the underlay, if necessary place the panel under your knees/feet to distribute the load.

Finishing the installation

Step 6
Repeat steps 4 to 5 until the flooring has been installed throughout the entire room. Connect the individual panels of the underlay using the easy click® contour.

Technical data (according to EN 16354)

Punctual conformability (PC)	up to 2 mm
Compressive strength (CS)	≥ 90 kPa
Compressive creep (CC)	≥ 25 kPa
Dynamic load (DL₂₅)	≥ 250,000 cycles
Resistance to large ball (RLB)	≥ 140 cm
Water vapour diffusion resistance (SD)	–
Thermal resistance (R)	∼ 0.1 m²K/W
Impact sound reduction (IS)	up to 22 dB
Reaction to fire (RTF)	E_fl
*Suitability for underfloor heating	No