Preliminary precautions

Installation

If installing the bonded RENOVA system, in order to ensure a

successful casting, it is very important to check the conditions

of the sub-floor, especially in the case in which the covering of

the existing floor is removed, or you want to apply the system

•

on rough sub-floor. In particular it is important that:

• The bearing area is load bearing, compact, dry and flat.

•

Otherwise, discuss any treatments with the screed supplier

(for example, cellular concrete sub-floor without tear

•

resistance requires casting 5 mm of self-levelling cement-

based compound);

•

The bearing area be impermeable to water. Otherwise, treat

•

the surface with acrylic primer, even repeatedly, to ensure

complete impermeability; discuss any other preliminary

•

treatments (such as washing/ degreasing) with the supplier;

•

•

To ensure the adhesion of the bond of the RENOVA panel

maintain the maximum cleanliness the sub-floor during

•

application of the panel (a dusty surface is not a compact

surface);

•

Ensure that the sub-floor is maintained at a temperature

•

higher than 10 °C, the temperature below which the bond

loses its properties;

•

NOTE: Laying in conditions that make adhesion of the bond

•

difficult (such as sub-floor temperatures below 10 °C), or use of

other pipes (such as Polysuper pipe) may require anchoring the

panel to the sub-floor (for example with steel nails with straps or

insulation nails) before casting the screed, to prevent the panel

from floating.

With the RENOVA panel, we recommend the use of Polystop

pipe, because its malleability allows installation without stresses

that can lead to the lifting of the panel or lift part of the bends

of the pipe itself.

YES

NO

NOTE: The products to be used for screeds must be declared

by the supplier as suitable for installation over 10-mm thick

pipes, such as Knauf NE425 Knauf, Kerakoll Keratech R30,

Mapei Ultraplan Maxi or Q-Mix Q-Mas Slim Bio.

In order to obtain a radiant system with the maximum

performance, after taking the preliminary precautions listed

above, it is necessary to follow this procedure:

Install the specific lowered expansion edge strip without

PE film;

Install the RENOVA panel starting from the side walls and

fitting one panel on the other using perimeter bosses;

If using expansion edge strip of standard height, with PE

film, take care that the strip does not go to cover the hole

in the top of the bosses of the RENOVA panel;

Install the pipe on the RENOVA panel realising the circuits

as per the installation diagram;

Perform the leak test;

Ensure that the panel is in contact with the sub-floor and

secure it in the case of lifting;

Evaluate and position the expansion joint strips according

to the UNI 1264 standard and/or according to the screed

manufacturer's instructions;

Proceed to pour the special screed to a thickness of 10 mm

above the pipe;

Carry out screed heating tests as per UNI 1264 and/or as

indicated by the screed supplier.

Install the floor covering.

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Underfloor Radiant Systems - Product Guide

19