Visqueen Ultimate VOC BLOK

Visqueen Ultimate VOC BLOK is a flexible membrane designed to comply with current guidance on Volatile Organic Compounds (VOCs) and ground gases.

Manufactured using Visqueen’s advanced membrane technology and is suitable in brownfield applications which are affected by aggressive chemicals such as Benzene, Toluene, Ethyl Benzene and Xylene (BTEX). The product is available in large roll formats to minimize jointing and for quick installation. The membrane is grey and black, 2440 x 41 000 x 1 mm (100 m²), in single wound roll format.

Features and benefits:

• Conforms to CIRIA C748 and BS 8485:2015. CE marked to EN 13967.

• Excellent VOC and methane barrier resistance.

• Exceptional flexibility and puncture resistance.

• Comprehensively tested and validated test results.

• Welding and Visqueen Gas Resistant tap system options.

• Flexible, even at low temperatures which limits stress cracking.

System components:

• Visqueen GX double-sided bonding tape.

• Visqueen gas resistant lap tape.

• Visqueen surface DPC fixing system.

• Visqueen GX DPC.

• Visqueen GX top hat units.

• Visqueen detailing strip.

Applications:

Suitable for the following applications:

• VOC/ hydrocarbon contaminated sites in accordance with CIRIA C748.

• Carbon dioxide and methane sites in accordance with BS 8485:2015.

• Radon affected sites in accordance with BRE 211:2015.

• Damp protection in accordance with Building Regulations Approved Document C.

Ventilation:

Visqueen recommends when high levels of ground gases are present in accordance with BS 8485:2015 or when the generation of gases still occurs, then an open void beneath the ground floor should be constructed as ventilation beneath the ground floor will dilute and disperse the gases to atmosphere. Open voids are normally restricted to beam and block floors or other precast concrete floor systems. An alternative for providing ventilation to in situ concrete floor slabs is to install a Visqueen Gas Venting System.