Isocheck Adjustable Acoustic Cradle

Suspended system for uneven concrete floors and roof terraces

Isocheck Cradle acoustic flooring system is designed to reduce impact sound transmission through uneven or cambered concrete floors by elevating the floor on timber battens that are supported by an adjustable plastic cradle. This system can facilitate the incorporation of services, is also frequently specified with water based underfloor heating systems and can be used as a support for timber roof terraces.

The Adjustable Cradle comprises an injection moulded recycled plastic adjustable thread and supporting ring to ensure precise levelling across uneven concrete sub-floors without the need for conventional packers. Additional elevating blocks are available for applications where extra height is required.

The Cradle is New Build Robust Detail compliant for masonry floor construction and where the structural sub floor has a camber or is irregular and needs levelling.

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Typical applications
To be used over hollow core, in-situ or supported metal deck concrete floors for new build or conversions as illustrated or approved by Isomass (on application to technical@isomass.co.uk for our free acoustic detail design service).

Incorporating an underfloor heating system
Isomass Ltd has developed a number of acoustic floor solutions that could complement the requirement for underfloor heating. The company’s experience in acoustics will ensure that the integration of the underfloor heating system meets your requirements. The floor details shown (see details tab) are known to comply with Approved Document E of the building regulations and in some cases Robust Details. Should they not match your requirements, please contact Isomass Ltd. who will be happy to discuss suitable alternatives.

For flat roof terraces
Our Adjustable Cradle and batten system is also designed to work with decking in an inverted flat roof. It opens up endless possibilities for the design and layout of an outdoor space in a roof terrace. As flat roofs need to have a minimum finished fall of 1:80 (as defined in BS 6229:2018) to ensure water will not pond on the roof surface, Isocheck Adjustable Cradle and battens will allow the finished surface to be actually flat - so providing a usable terrace area. See details tab for a typical terrace application.

❏ Lightweight and easy to install.

❏ Made from recycled plastics.

❏ Precise height adjustment.

❏ Gradient adjustable.

❏ Resistant to changes in ambient temperature.

❏ Not biodegradable.

❏ When correctly installed will resist movement of the leveled floor surface.

❏ Provides a cavity for services.

❏ Easily removed and reused.

❏ Facilitates rapid surface drainage.

❏ Resistant to ice under the terrace.

❏ Quick and easy disassembly in the event of a terrace inspection

(on the two typical New Build Robust Detail constructions illustrated)

Treated floor meets with the New Build Robust Detail descriptive FFT2, typically within Robust Details E-FC-1, E-FS-1, E-FC-2 and E-FC-7.

Overall size inc resilient layer: 128.4mm diameter x 70mm high
Minimum raise (without elevating blocks): 20mm
Maximum raise (without elevating blocks): 56mm
Resilient layer: 100mm x 100mm x 6mm thick Isopoli HD
Cradle body: Recycled ABS

Isocheck Adjustable Cradle system , supplied by Isomass Ltd. Units 10 & 11, Avenue Business Park, Elsworth, Cambridgeshire CB23 4EY and installed in accordance with manufacturer’s instructions / recommendations.

Full installation instructions for Isocheck Adjustable Cradle are available as a pdf to download. Go to the Downloads tab on this page.

Isocheck Adjustable Acoustic Cradle installation instructions

DOWNLOAD

Isocheck Adjustable Acoustic Cradle product data sheet

DOWNLOAD
    Typical applications

  • 18mm or 22mm chipboard floor.
  • Isocheck Adjustable Cradle with a (commonly used) strength-graded 45mm x 45mm batten @ 400mm centres.
  • 130mm min. in-situ concrete (80mm min. fully supported) on profiled metal deck (left) or
  • 150mm min. hollow core concrete plank min. 300kg/m2 excluding screed (right).
  • Metal frame suspended ceiling with 75mm void and 10kg/m2 plasterboard or with 100mm void and 8kg/m2 plasterboard.


    Incorporating an underfloor heating system

  • 18mm or 22mm chipboard floor.
  • Isocheck Adjustable Cradle with a (commonly used) strength-graded 45mm x 45mm batten @ 400mm centres.
  • 25mm mineral fibre insulation 36kg/m3 with pipe fixings (left).
  • 130mm min. in-situ concrete (80mm min. fully supported) on profiled metal deck or
  • 150mm min. hollow core concrete plank min. 300kg/m2 excluding screed.
  • Metal frame suspended ceiling with 75mm void and 10kg/m2 plasterboard or with 100mm void and 8kg/m2 plasterboard.
  • alternative arrangement using propriety supporting pipework tray (right).


    For flat roof terraces

  • hardwood timber deck.
  • Isocheck Adjustable Cradle with a (commonly used) strength-graded 45mm x 45mm batten* @ 400mm centres. If required, the adjustable Cradle can be placed on WBP plywood spreader plates. *deeper battens can also be used.
  • Mechanically fixed or fully adhered single ply membrane.
  • Rigid insulation fixed to timber deck (for example, foil-faced polyisocyanurate (PIR) insulation) - type, thickness and fixing requirements as specified by the Architect.
  • Vapour control layer (AVCL) (for example, min. 1000 gauge (250μm) polyethylene sheet).
  • 18mm min. plywood deck over timber firrings.
  • 150mm x 50mm timber joists at 400mm centres with 100mm mineral fibre insulation between the joists.
  • Isocheck Isoblock and Isobar system fixed to underside of joists. Please refer to separate product datasheet and installation instructions, available from Isomass, for details.
  • Two layers of staggered, sealed 12.5mm sound-grade (fire rated) plasterboard (min. total combined mass 22kg/m2).

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