MAPESONIC CR Advanced Soundproofing for Floors 1m x 20m

Mapei Mapesonic CR – Acoustic Soundproofing Membrane for Floors

Mapei Mapesonic CR is a thin-section acoustic soundproofing membrane designed to reduce impact and footstep noise transmitted through floor structures. Manufactured from recomposed cork and recycled rubber bound together with a high-quality polyurethane composite, it provides an effective acoustic layer beneath new floor coverings.

Developed particularly for renovation projects, Mapesonic CR can be installed over suitable existing cementitious substrates, ceramic tiles and natural stone floors without the need to remove the existing floor covering or screed, provided the existing surface is properly prepared and securely bonded.

Available in 2mm and 4mm thicknesses, Mapesonic CR provides acoustic insulation while keeping additional floor height to a minimum. It also offers uncoupling and anti-fracture properties and can be used in conjunction with compatible underfloor heating systems.

Key Benefits

• Designed to reduce impact and footstep noise transmitted through floors.
• Impact noise reduction of up to 18dB with bonded flooring, according to the manufacturer's test data.
• Available in low-profile 2mm and 4mm thicknesses.
• Manufactured from recomposed cork and recycled rubber with polyurethane binder.
• Suitable for renovation projects without removing suitable existing floors and screeds.
• Uncoupling and anti-fracture properties.
• Suitable beneath ceramic, porcelain, stone, resilient and multi-layered wooden flooring.
• Can be installed over compatible underfloor heating systems.
• Very low VOC emissions, classified EMICODE EC1 Plus.
• Made using recycled and recyclable raw materials.

Suitable Applications

Mapesonic CR is designed for under-floor acoustic insulation in existing buildings and renovation projects, including:

• Residential properties and apartments.
• Hotels and hospitality buildings.
• Offices and commercial premises.
• Schools and educational buildings.
• Rest homes and similar facilities.

Compatible Floor Coverings

• Ceramic and porcelain tiles.
• Natural and manufactured stone.
• Resilient flooring, including PVC, rubber and linoleum.
• Multi-layered parquet and engineered wood flooring.
• Laminate and other suitable floating floor coverings.

The selected flooring adhesive and installation method must be compatible with Mapesonic CR and the intended floor finish. Follow Mapei's technical instructions for the relevant flooring system.

Acoustic Performance

Mapesonic CR is designed to reduce impact noise, particularly footsteps, transmitted through floor structures. Mapei's technical data specifies an impact-noise reduction of 18dB with bonded flooring.

The measured result depends on the floor covering, adhesive, substrate and complete floor construction. The 18dB figure should not be treated as a guaranteed result for every installation.

Available Thicknesses and Sizes

Technical Specifications

• Product: Mapei Mapesonic CR.
• Product type: Acoustic soundproofing and uncoupling membrane.
• Material: Recomposed cork and recycled rubber bound with polyurethane.
• Colour: Brown-black.
• Available thicknesses: 2mm and 4mm.
• Roll width: 1m.
• Roll lengths: 20m (2mm) and 10m (4mm).
• Thermal resistance: 0.024m²K/W (2mm) and 0.048m²K/W (4mm).
• Elongation at failure (EN ISO 1798): 20%.
• Tensile strength (EN ISO 1798): 0.6N/mm².
• Cohesion under pull-off test: Greater than 0.5N/mm².
• Impact-noise reduction with bonded flooring: 18dB.
• Reaction to fire: Class C-s1 according to EN 13501-1.
• VOC classification: EMICODE EC1 Plus – very low emissions.

Installation Overview

• Ensure the substrate is mechanically sound, dry, clean, flat and free from dust or contamination.
• Existing ceramic and stone floors must be firmly bonded to the substrate and thoroughly cleaned before installation.
• Repair cracks and prepare uneven surfaces using suitable Mapei preparation products.
• Apply the appropriate Mapesonic Strip perimeter acoustic tape around walls, pillars and other vertical elements to help prevent acoustic bridging.
• Unroll Mapesonic CR in the direction of the longest side of the room and allow the material to acclimatise for the period specified in the manufacturer's instructions.
• Bond the membrane using a compatible Mapei adhesive selected for the intended floor covering.
• Lay the membrane continuously, taking particular care at corners, joints and floor penetrations.
• Install the selected floor covering using the appropriate adhesive and manufacturer's instructions.
• Keep skirting boards clear of the finished floor and seal the perimeter gap using a suitable flexible sealant to help prevent acoustic bridges.

Mapesonic System Accessories

Mapesonic Strip is the dedicated perimeter accessory used with Mapesonic CR. It is made from closed-cell expanded polyethylene and is applied around the perimeter of the room, pillars and other floor abutments to help prevent acoustic bridges.

• Mapesonic Strip thickness: 3mm.
• Width: 50mm.
• Length: 11m per roll.
• Packaging: Box of four rolls.

Important Application Requirements

• Do not install over structural expansion joints.
• Do not install over substrates subject to continuous rising damp.
• Existing floor coverings must be securely bonded and properly prepared.
• Uneven substrates must be levelled before installing the membrane.
• Use compatible adhesives for the selected floor covering.
• Perimeter detailing is important to prevent acoustic bridges.
• Always follow the manufacturer's current installation instructions.

Frequently Asked Questions

What is Mapei Mapesonic CR used for?

Mapesonic CR is an acoustic insulation membrane used beneath new floor coverings to reduce impact and footstep noise transmitted through floor structures.

Can Mapesonic CR be installed over existing floor tiles?

Yes. It can be installed over existing ceramic and natural stone floors, provided they are securely bonded, clean and properly prepared.

What thicknesses are available?

Mapesonic CR is available in 2mm and 4mm thicknesses. The 2mm version is supplied in 20m x 1m rolls, while the 4mm version is supplied in 10m x 1m rolls.

How much sound reduction does Mapesonic CR provide?

Mapei's technical data specifies an impact-noise reduction of 18dB with bonded flooring. Actual results depend on the complete floor construction and installation.

Can Mapesonic CR be used with underfloor heating?

Yes. Mapei confirms that Mapesonic CR can be installed over compatible heated floors. Its thermal resistance is 0.024m²K/W at 2mm and 0.048m²K/W at 4mm.

Does Mapesonic CR require a special adhesive?

No special adhesive is required for the membrane itself, but the adhesive must be compatible with Mapesonic CR and the selected floor covering. Follow Mapei's recommendations for the relevant application.

Does Mapesonic CR require a Safety Data Sheet?

No. Mapei classifies Mapesonic CR as an article, so a Safety Data Sheet is not required under the applicable REACH requirements.

Technical Documentation

Consult the manufacturer's technical data sheet for full substrate preparation, adhesive selection, installation procedures and acoustic performance information.

Supply from Clever Shield Coatings UK

Clever Shield Coatings UK supplies Mapei products throughout the UK. Always consult the manufacturer's technical documentation to confirm substrate suitability, adhesive compatibility and the correct installation procedure for the selected floor covering.