Weber - Weber Niv Plus

Weber - Weber Niv Plus

niveplus

New work

● Cement screeds
● Screeds with underfloor heating Contains cement.
● Concrete slabs
● Pre-cast concrete floors

Renovation
● Existing tiling
● Rigid plastic tiles
● Existing paints (epoxy, polyurethane, acrylic)

Suitable for covering with:
● Tiling
● Parquet flooring
● Self-levelling compounds applied underneath carpeting and flexible floor coverings
● Certain floor paints

weber.niv plus is compatible with the adhesives used with the coverings listed above.
In situations that will be very humid, such as bathrooms, weber.sys protec tanking system may be applied over weber.niv plus.
Rapid-drying, high-build levelling compound for interior floors (5 – 25 mm)

About this product

weber.niv plus is a cement based, rapid drying, levelling compound. It is used for correcting surface irregularities where a deep bed thickness is required, in interior dry situations.

Constraints

Do not use:
on permanently damp floors or floors
with rising damp
on friable or unstable floors
in industrial areas
on exterior floors

Features and Benefits

▲ Manufactured under BSI Quality Assurance Scheme ISO 9001
▲ For screeds up to 25 mm
▲ Very rapid drying (may be tiled after 2 hours)
▲ Excellent spreading and smoothing characteristics
▲ Can be pump fed for large areas as a special application by contractors approved by Weber

Preparation

Switch off any under-floor heating systems at least 24 hours before application.

Substrates should be completely dry, hard, rigid and clean.

Scrape off any traces of paint, plaster, laitance or other unsound materials. Thoroughly remove all traces of dust by vacuuming or sweeping.

Fill in any localised holes, up to 50 mm deep with weber.niv plus beforehand and allow to dry.

Priming is recommended to improve adhesion, reduce air bubbles and prevent suction from the substrate de-watering the leveller. It may not be necessary for medium porosity substrates, but all others must be primed, and the primer allowed to dry, before applying weber.niv plus.

Very porous or slightly porous surfaces should be primed with weber PR360 and allowed to dry for 1 to 4 hours. Anhydrite screeds must be primed with weber PR360. Completely impervious surfaces should be primed with weber PR301 and allowed to dry for 2 to 3 hours.

Mixing

Do not mix if the temperature is outside of the range +5°C to +30°C.

Thoroughly mix around 4 to 4.5 litres of water per 25 kg bag using a slow speed electric mixer (500 rpm) for at least one minute until a fluid, homogenous paste is obtained. Allow newly mixed material to stand for 2 minutes before use and use within 20 minutes. At high temperatures, this time will be reduced.

Application

Pour the mixed weber.niv plus mortar onto the floor. Level off with a straight edge if necessary and smooth down with a float, to ensure that any pores are filled and release trapped air. A spiked roller could also be used.

The application thickness should be between 5 and 25 mm.

If a second coat is required, apply it as soon as the first coat has hardened. If more than 24 hours have passed between layers, prime the first layer with weber PR360.

weber.niv plus is not intended as a wearing surface, so the final finishing layer should be applied as soon as possible after drying has completed. If it is to be left for a prolonged period of time, the surface should be suitably protected.

Allowance for movement

Allow for suitable expansion or control joints in screeds or slabs, by following them through the new topping.

ACCESSORIES

weber PR301: approximately 0.2 kg/m2
weber PR360: approximately 0.2 kg/m2

Health and Safety

Contains cement.
For full information on Health and Safety, please see inside back cover.

Technical services

Technical services Weber’s Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.

Technical helpline

Tel: (01525) 722137
Fax: (01525) 718988

Storage and Shelf life

When stored unopened in a cool, dry place at temperatures above 5°C, shelf life is 12 months from date of manufacture.

Weber - Weber Niv Plus

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