Stephen Thornton, flooring and tiling technical manager at Saint-Gobain Weber, elaborates on the importance of selecting the right acoustics for flooring installation.
Stephen Thornton, flooring and tiling technical manager at Saint-Gobain Weber, elaborates on the importance of selecting the right acoustics for flooring installation.
MULTI-RESIDENTIAL schemes are getting denser, mixed in tenure and more diverse; homes sit over retail and amenity floors, and plant rooms run beneath bedrooms. Hard floor finishes, including tiles, are routinely requested for durability and hygiene.
In such cases, acoustic performance is a basic condition for neighbourly living. The challenge lies in how to detail floors so day-to-day impact noise is controlled without compromising programme, heating strategy or the chosen tile finish.
A well detailed tiled finish can sit happily over an acoustic floor build-up, but only when the whole floor is designed and installed as a single, tested system. The structure, resilient layer, screed, heating, adhesive, grout and sealants should be treated as one package, not a series of hand-offs.
Why tiles are not the enemy of quiet
Tiles are often perceived as a hard, ‘noisy’ choice. In practice, keeping the resilient acoustic layer below a suitable flowing or cementitious screed and bonding the tile finish to that stable base preserves impact sound performance while giving tiles the stiffness they need for point loads.
However, if an acoustic mat must be placed directly beneath tiles, select products explicitly tested and warranted for tiled finishes with clear limits on tile size and adhesive class.
The market now offers composite systems pairing resilient layers with pumpable screeds, tile adhesive and primer.
REGUPOL acoustic matting is one option frequently considered in residential schemes; as with any brand, specifiers should check published test data for the exact construction and confirm whether underfloor heating (UFH) has been validated within the same build-up.
Where a supplier has not yet published UFH evidence, seek written confirmation or choose an alternative with complete data.
Set performance and programme rules early
In multi-residential work, the primary driver is Approved Document E compliance for impact and airborne sound between dwellings. Agree targets early so thickness, density and dynamic stiffness choices are locked in and clashes with door thresholds or MEP zones are avoided.
Coordinate penetrations and thresholds so the resilient layer is not bridged and flanking paths are controlled.
Underfloor heating without acoustic compromise
Tiled systems remain a strong partner for heat pump-led, low-temperature UFH because ceramic and stone offer useful thermal mass. Acoustic layers can influence output and response time, so use systems that have been verified as a complete assembly.
Follow staged commissioning before tiling and confirm adhesive and grout suitability for heated floors. Where UFH validation is absent for a chosen acoustic mat, treat that as a gap to close at specification stage, not on site.
Adhesives, grout and sealants make the system work
When it comes to specifying adhesives, grouts and sealants, there are a few things to bear in mind:
– Choose highly deformable adhesives in line with BS EN 12004-1 and classified to S1 or S2 according to the tested system.
– Finish with a suitable grout and matched perimeter sealant to maintain isolation at edges.
– Low dust formulations can improve handling and site hygiene without diluting performance.
– Be alert to tile backings. Resin-backed stone and some soft backings can prevent reliable adhesion. Carry out a test tile and ensure the backing is compatible with the chosen adhesive. Aim for 100% effective contact under large-format tiles.
Bottom line for specifiers and fixers
When it comes to multi-residential projects with tiled finishes, prioritise the following actions:
– Define acoustic and thermal targets early, then select a tested system that meets both.
– Keep resilience below the screed where possible and use deformable adhesives matched to the test data.
– Control movement and moisture, especially on calcium sulphate screeds, and keep photographic evidence of perimeter isolation.
– Verify UFH compatibility for the exact acoustic build-up, not just the components in isolation.
– Plan for winter working so neither chemistry nor detailing are undermined by site conditions.
Do the above and a tiled finish becomes part of the solution, delivering durable, cleanable floors with the acoustic comfort modern developments require.
Stephen Thornton
Flooring and tiling technical manager at Saint-Gobain Weber | www.uk.weber
