Siderise CW Range: CVB/C10 | Acoustic Cavity Barrier for Curtain Walling – Technical Data

Version: 1.01 - Release Date: January 2023

Application

The Siderise CVB/C10 is a stonewool cavity barrier incorporating a central polymeric mass barrier layer. It is designed for use as a mass line below horizontal firestopping in curtain walls to improve acoustic performance via the critical slab edge void.

Using this acoustic upgrade can offer a significant improvement to the acoustic performance of the firestop. Incorporating mass barriers such as the Siderise CVB/C10 into slab-edge details is often crucial for controlling floor-to-floor sound transmission.

Siderise CVB/C10 is quick and easily to install, and is suitable for use in all curtain walls. The product is thin and flexible, and is designed to accommodate façade movement, unlike traditional mass-barrier materials such as steel or plasterboard.

Benefits

Reduces floor to floor sound transmission
Ideal for remedial treatment after installation of fire stops
Accommodates façade movement
Quick and easy to install

Product Description

Siderise CVB/C10 consists of a thin, flexible polymeric mass barrier core offering 10 kg/m2 of surface mass to resist sound transmission. This is surrounded by high density stonewool on both sides. The faces are reinforced with aluminium foil. The entire product is 55 mm thick.

Acoustic considerations

The fire stop between the floor slab and façade represents a point of significant potential weakness in vertical sound transmission between floors.

Our facades technical team can provide guidance around using this acoustic upgrade to meet the project acoustic performance requirements.

Acoustic Performance

As the CVB/C10 is sold as an acoustic upgrade for our CW-FS firestops, we have not tested its standalone performance, however for the purposes of assessment by project acoustic consultants, the Weighted Sound Reduction index (dB Rw) of the mass barrier layer alone is presented below in Table 1.

See acoustic improvement below for the sound reduction index of this product in combination with our other slab edge treatment products.

Additional acoustic performance increases can be achieved by combining the AB10 and CW-FS with the Siderise CVB/C10 cavity barrier. Contact our facades technical team at technical.services@siderise.com for performance guidance or 1/3rd octave test data.

Table 1

Element	Thickness (mm)	Surface Mass (Kg/m²2)	Acoustic Performance (dB Rw)
CVB/C10 (mass barrier layer only)	5.5	10.5	32

Technical Specification

Table 2

Form supplied (mm)	1000 x 1200 sheet
Colour	Silver face
Finish	Aluminium foil facing to both sides
Thickness (mm)	55
Barrier layer surface mass (kg/m²)	10.5
Mass membrane	Polymeric barrier
Fire performance	B-s2 d0

Additional Information

The following information is available upon request or via download from the website:

Safety Data Sheet
Standard Details
NBS Specification Clause

Technical Support

For technical advice or support please contact: technical.services@siderise.com

For Installation Training or Site Inspections please contact: site.services@siderise.com

Context

The information in this datasheet is believed to be accurate at the date of publication. Siderise has a policy of continuous product improvement and reserves the right to alter or amend the specifications of products without prior notice. Siderise does not accept responsibility for the consequences of using the products described outside of the recommendations within this datasheet. Expert advice should be sought where there is any doubt about the correct specification or installation of Siderise products.

Published Version: CVB-C10_v1_01_2023015_136