TECSOUND 70 Non-Adhesive Membrane

TECSOUND 70 Non-Adhesive Membrane Technical Specifications

TECSOUND 70 Non-Adhesive Membrane is a flexible, high-density acoustic barrier designed to add mass to walls, floors and ceilings. With a mass of 7kg/m², it provides a heavier acoustic layer than TECSOUND 50 and is well suited to floor systems, wall linings and ceiling build-ups where additional mass is required.

Product Specification

Suitable Surfaces and Systems

TECSOUND 70 Non-Adhesive Membrane can be used within a range of wall, floor and ceiling constructions. It is commonly installed with:

• Floating floor systems
• Plasterboard systems
• Timber board systems
• MDF and sheet board layers
• Ceiling linings and bulkheads
• Resilient bar or furring channel systems
• Acoustic mineral wool and cavity insulation

Acoustic Use

TECSOUND 70 is mainly used to help reduce airborne noise, including voices, TV noise, music and general sound transfer through walls, floors and ceilings.

Because it has a mass of 7kg/m², it is also useful within suitable floor and ceiling systems where additional vibration damping and impact noise reduction are required. The final performance will depend on the complete acoustic build-up.

Common System Uses

• Floor soundproofing build-ups
• Party wall soundproofing
• Ceiling soundproofing systems
• Board sandwich constructions
• Flats, apartments and multi-storey buildings
• Studios, music rooms and media rooms
• Commercial offices, meeting rooms and shared spaces

Important Performance Note

Soundproofing performance depends on the full system. The final result will be affected by the existing wall, floor or ceiling construction, the number of layers used, the supporting materials, the installation quality and whether gaps, joints and flanking paths are properly sealed.

For best results, TECSOUND 70 is commonly combined with other acoustic materials such as acoustic plasterboard, acoustic mineral wool, resilient channels, furring channels, floating floor layers and acoustic sealant.

Handling Advice

TECSOUND 70 is a high-mass product, with an approximate roll weight of around 42kg. For larger areas, ceilings or overhead work, we recommend working in pairs and cutting the membrane into manageable sections before fitting.

Visit our fitting instructions section for more detailed guidance specific to your application. Please contact our team if you have any questions about this product.

How to Install TECSOUND 70 Non-Adhesive Acoustic Membrane

TECSOUND 70 Non-Adhesive Membrane is a high-density acoustic membrane designed to reduce airborne noise transfer through walls, ceilings and floors. With a mass of 7kg/m², it provides a heavier acoustic layer than TECSOUND 50 and is suitable for projects where increased sound reduction, impact noise control and vibration damping are required.

Unlike the self-adhesive SY version, TECSOUND 70 does not have a peel-and-stick backing. It can be installed using a suitable adhesive, mechanically fixed where appropriate, laid within a floor build-up, or held securely between layers as part of a complete soundproofing system.

What You’ll Need

• TECSOUND 70 Non-Adhesive Acoustic Membrane
• Measuring tape
• Sharp Stanley knife or utility blade
• Straight edge or metal ruler
• Suitable adhesive, such as a compatible contact adhesive or acoustic adhesive
• Trowel, brush or roller for applying adhesive
• Hand roller for pressing the membrane into place
• Gloves for handling
• Acoustic sealant for edges and gaps
• Acoustic putty pads for socket boxes, if required
• Tecsound jointing tape or suitable acoustic tape, if required

Before You Start

Allow TECSOUND 70 to acclimatise in the room for around 24 hours before installation where possible. This helps the membrane settle to the room temperature and makes it easier to handle, position and cut.

TECSOUND 70 is a heavy acoustic membrane, so large pieces can be difficult to control, especially on ceilings or overhead areas. For larger installations, we recommend working in pairs and cutting the membrane into manageable sections before fitting.

Step 1: Prepare the Surface

Before installing the membrane, make sure the surface is properly prepared. The surface should be:

• Clean — remove dust, dirt, grease, debris and loose particles.
• Dry — avoid installing onto damp or wet surfaces.
• Smooth and stable — fill cracks, gaps and uneven areas before fitting.
• Structurally sound — do not apply to weak, crumbling or unstable surfaces.

TECSOUND 70 can be installed with suitable plasterboard, masonry, timber, MDF, concrete and board systems. Good preparation is important because dust, moisture or loose material can reduce the effectiveness of the adhesive or fixing method.

Step 2: Measure and Cut the Membrane

1. Measure the area where TECSOUND 70 will be installed.
2. Mark the required size on the membrane.
3. Use a sharp Stanley knife or utility blade with a straight edge to cut the membrane neatly.
4. Cut accurately to reduce gaps, waste and weak points in the finished system.

Allow for a small overlap of approximately 5mm to 10mm between sheets where possible. If installing on a ceiling, pre-cut smaller sections to make handling, positioning and fixing easier.

Step 3: Apply the Adhesive or Fixing Method

Choose a suitable adhesive or fixing method for your application. For wall and ceiling installations, a compatible contact adhesive or acoustic adhesive may be used. Always follow the adhesive manufacturer’s instructions for coverage, open time, drying time and surface compatibility.

1. Apply adhesive to one section at a time so it does not dry before the membrane is positioned.
2. Use a trowel, brush or roller to create an even adhesive layer.
3. If using contact adhesive, apply it to both the surface and the back of the membrane if required by the adhesive instructions.
4. Allow the adhesive to become ready for bonding before positioning the membrane.

For floor systems or board sandwich constructions, the membrane may be laid or held in place by the surrounding layers rather than bonded directly. The correct method depends on the full soundproofing build-up.

Step 4: Fix TECSOUND 70 in Place

1. Carefully align the first section of membrane with the installation area.
2. Press the membrane firmly onto the prepared adhesive or into position within the system.
3. Smooth the membrane as you work to reduce air pockets and wrinkles.
4. Use a hand roller or firm pressure to ensure good contact across the full surface.
5. Continue fitting each section, keeping coverage as continuous as possible.

Work carefully and methodically. Because TECSOUND 70 is heavier than TECSOUND 50, avoid trying to position too much material at once, especially when working overhead.

Step 5: Overlap and Seal the Joints

Where sheets meet, overlap TECSOUND 70 by around 5mm to 10mm where possible. Press the overlap firmly to create a close-fitting joint and maintain a continuous acoustic barrier.

For improved acoustic performance and airtightness, joints can be reinforced using Tecsound jointing tape or a suitable acoustic tape. This is especially useful in higher-performance wall, floor and ceiling systems where gaps could reduce the final result.

Step 6: Trim Edges and Openings

Once the membrane is fitted, trim excess material around edges, corners, sockets, switches, pipes or openings using a sharp blade and straight edge.

Small gaps can reduce soundproofing performance, so seal weak points carefully. Use acoustic sealant around perimeter edges, joints and small gaps. Where electrical sockets or switches are present, use acoustic putty pads to help reduce sound leakage through the back boxes.

Step 7: Add the Next Layer

Once TECSOUND 70 has been installed, it can be covered or incorporated into the next part of the soundproofing system. Depending on your project, this may include:

• Acoustic plasterboard
• Standard plasterboard
• MDF or timber board
• Floating floor layers
• Acoustic underlay systems
• Resilient bars or furring channels
• Acoustic mineral wool within the cavity
• Additional acoustic membrane layers where specified

TECSOUND 70 performs best as part of a complete acoustic system. For example, floor systems may combine acoustic membrane, floating floor layers, underlay and acoustic sealant. Wall and ceiling systems may combine acoustic membrane, insulation, isolation products, plasterboard layers and sealed edges.

Installation Tips

• Check adhesive compatibility — use a suitable adhesive for both the membrane and the surface.
• Work in manageable sections — especially on ceilings, walls and larger areas.
• Work in pairs where needed — TECSOUND 70 is heavy and can be difficult to handle alone.
• Use firm pressure — a roller helps improve contact and reduce trapped air.
• Keep coverage continuous — gaps can reduce acoustic performance.
• Seal all edges and penetrations — sound can pass through small openings.
• Use sharp blades — clean cuts make fitting easier and reduce waste.

Important Soundproofing Note

Soundproofing performance depends on the full system, not just one individual product. TECSOUND 70 adds valuable acoustic mass and vibration damping, but the final result will also depend on the existing structure, supporting materials, installation quality and how well gaps and flanking paths are controlled.

If you are unsure how to install TECSOUND 70 Non-Adhesive Membrane for your wall, ceiling or floor project, please contact our team before fitting. We can help advise on the most suitable build-up for your room, noise type and available space.