Nine Elms Parkside Case Study: Under Screed Acoustic Layer

Nine Elms Parkside: Under Screed Acoustic Layer

When carrying out a large-scale housing development it pays to rely on tried and tested products to provide acoustic certainty. Regupol 7210C (REGUPOL sonus core 5) is one such product. With a long history of reliability, it is now being installed in the UK’s largest single-phase build to rent development.

The Project

Nine Elms Parkside is the redevelopment of a 5.6 hectare Royal Mail depot site in Wandsworth, a key part the Vauxhall Battersea Opportunity Area, sitting between Battersea Power Station and Nine Elms market and adjacent to the new US Embassy. The scheme is master planned around the new Nine Elms Linear Park, part of a new green link connecting Battersea Park in the west, along the Thames to Lambeth Palace Gardens in the east.

Blocks B and D Nine Elms Parkside were acquired in 2019 by real estate groups Henderson Park and Greystar who contracted Telford Homes to construct 641,000sft of residential space to a design by Allies & Morrison.

The scheme consists of 894 build to rent apartments in two twin blocks of 10 to 17 storeys, each of which also features 12,500sft of amenity space with a rooftop swimming pool, gym, pet spa, children’s play space, private dining rooms, cinema rooms and a sky lounge. There are two large outdoor terraces, yoga gardens and community herb gardens complete with beehives. The scheme will also contain 25,000 sq ft of retail and community space.

CMS Danskin is supplying Regupol 7210C (REGUPOL sonus core 5) Acoustic Resilient Layer to Stanmore, the leading drylining and façade specialist subcontractors who are carrying out the screeding between floors in the apartments.

The project to supply commenced in 2020 and we have to date supplied over 96,000m2 of the product. Topping out took place in July 2021, residents will begin to occupy the scheme in 2022 and the units are expected to be fully complete in 2024.

Acoustic insulation for new build apartments

Since 2004 the Building Regulations require that separating floors between apartments meet specific requirements for airborne and impact sound transmission. The requirements are set out in Approved Document E, Resistance to the passage of sound.

With a 150mm concrete slab, common in multi storey new build apartments under 18 storeys, a product is required to isolate the structure from a floating screed, thereby significantly reducing impact and airborne noise and enhancing the living conditions of occupants of the apartments.

Regupol 7210C (REGUPOL sonus core 5) Acoustic Resilient Layer is an isolating layer specifically designed for this purpose and is the go-to product for floating screeds over 150mm concrete slabs.

Regupol 7210C (REGUPOL sonus core 5) Acoustic Resilient Layer is

• A high performing insulation that delivers superior impact and airborne performance.
• An under-screed product designed to isolate screeds from the main structure simply and conveniently.
• Manufactured from recycled materials – typically aircraft tyres – making it cost effective and sustainable.
• Compatible with all types of floor screed, making it adaptable across a project and between projects.
• Aimed at constructions where Pre-Completion Testing (PCT) is preferred to a Robust Detail (RD) approach.

Testing under screed insulation for acoustic performance

Pre-Completion Testing of acoustic floor installations gives a contractor more flexibility, allowing alternative layouts between apartments. If the designer wants to make changes to the layout of apartments, they won’t need to change the Robust Detail as each eventuality can be tested on site. With a project of over 860 flats a 10% required test rate would produce 86 acoustic tests, but the flexibility of using a PCT solution like 7210C (REGUPOL sonus core 5), and its reliability as an established product, makes that regime cost effective.

Telford Homes, a long-standing customer of CMS Danskin, were looking for a Pre-Completion Testing product for Nine Elms blocks B and D. Regupol 7210C (REGUPOL sonus core 5) Acoustic Resilient Layer is an established product from an established brand, so not only were Telford Homes familiar with the product, but their experienced screeders Stanmore were also confident that testing on site would not raise any issues.

Over a year into the project all the tests carried out so far have been successful.

Supply chain reliability

For a large project with over 100,000m2 of product required over a long contract period, reliability of supply is essential. Any delay in supply can hold up wet trades and affect the critical path. With support from our supply chain partners, CMS Danskin has ensured over 96,000m2 of product has been delivered on time to date.

Specify Regupol 7210C (REGUPOL sonus core 5) Acoustic Resilient Layer

Regupol 7210C (REGUPOL sonus core 5) Acoustic Resilient Layer is a tried and tested solution to under screed insulation over a concrete slab, be it in apartments, hotels, education buildings or student accommodation. It provides excellent impact and airborne performance, is approved by NHBC for ADE 2003 compliance, and offers long term performance even under high loads.

The product is completely recyclable and is produced from recycled materials. It provides Zero global warming potential (GWP) and zero ozone depletion potential (ODP).

Regupol 7210C (REGUPOL sonus core 5) Acoustic Resilient Layer is supplied in easy to handle sheets which are quick and easy to install without the need for separate perimeter strips.