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Visqueen Ultimate HC BLOK 2.44m x 41m x 0.5mm RS058032

Item No. 24890680

Availability:     In Stock

£1,140.00 Inc. VAT

Lead time:    Delivered within 2-4 working days

Product Overview:

Visqueen Ultimate HC Blok is a 0.5mm thick, chemically resistant co-extruded volatile organic compound barrier and gas barrier. It is coloured gold on the upper surface and white on the reverse. The product is supplied in single wound rolls (not folded), 2.44m x 41m.

Features & benefits

  • Agrement certified - third party accreditation
  • Complies with NHBC Foundation’s NF94 guidance for use in Type A and Type B membrane locations
  • Complies with CIRIA C748:2014 - industry standard for volatile organic compounds (VOC) protection
  • Complies with the methane gas transmission rate, mass per unit area and thickness requirements of BS 8485:2015 + A1:2019 - industry standard for methane and carbon dioxide protection
  • Flexible - easy to detail and install on site
  • Multi functional - also acts as a radon and damp proof membrane
  • Dual jointing methods - lap joints can be taped or heat welded


  • Visqueen Ultimate HC Blok is suitable for use in all types of buildings to prevent the ingress of harmful levels of volatile organic compounds (VOCs), methane, carbon dioxide and radon. The barrier can be positioned above or below a concrete ground foor slab or above a precast suspended segmental ground foor system, e.g. beam and block foor.
  • The barrier also acts as a damp proof membrane.
  • Radon, carbon dioxide, methane, and VOC protection – NHBC NF94 guidance: Visqueen Ultimate HC Blok when installed with either taped or welded joints (welded only for VOC protection) complies with NHBC Foundation’s NF94 publication, Hazardous ground gas - an essential guide for housebuilders, in Type A membrane locations in precast suspended segmental subfoors and reinforced cast in situ concrete foor slabs (ground bearing, suspended or raft).
  • Visqueen Ultimate HC Blok also complies with this guidance when installed with welded joints in Type B membrane locations in reinforced cast in situ concrete foor slabs (ground bearing, suspended or raft). For site or zone characteristic gas situations of CS4 and above, contact Visqueen Technical Services.
  • The product is not intended for use where there is a risk of hydrostatic pressure.

Our delivery partners 

DPD Next Day Delivery UK
Fedex Next Day Delivery UK
Fedex Next Day Delivery UK

Order Processing Time and Daily Cutoffs

We process and dispatch orders on working weekdays (Monday to Friday), excluding bank holidays. Any orders placed on weekends or out of hours begin processing the next working day. We have a daily cutoff for same-day dispatch of 12:00, so if you place an order before midday for an item displayed as 'in stock' it will be collected by our courier later that day. You'll receive an email notification once it has been scanned on by our courier, with a tracking number that you can follow on the carriers website. 

Delivery Charges and Delivery Timeframes

Orders above £50 inc.VAT can enjoy free delivery on us! Any orders beneath this contribute £4.99 towards delivery. Below we break down the typical delivery timeframes based on the stock status of your chosen item:

Order placed on: Receive Next Day 2 - 4 Day Lead Time
Monday before 12:00 Delivered Tuesday Delivered by Thursday 
Monday after 12:00 Delivered Wednesday  Delivered by Friday
Tuesday before 12:00 Delivered Wednesday Delivered by Friday
Tuesday after 12:00 Delivered Thursday  Delivered by Monday
Wednesday before 12:00 Delivered Thursday Delivered by Monday
Wednesday after 12:00 Delivered Friday  Delivered by Tuesday
Thursday before 12:00 Delivered Friday Delivered by Tuesday
Thursday after 12:00 Delivered Monday  Delivered by Wednesday
Friday before 12:00 Delivered Monday Delivered by Wednesday
Friday after 12:00  Delivered Tuesday Delivered by Thursday
Saturday Delivered Tuesday  Delivered by Thursday
Sunday Delivered Tuesday Delivered by Thursday

Easy Returns:

Whatever the reason, if you want to return your order, we are more than happy to offer a 30-day returns policy. This means you can return any item you have ordered as long as you inform us within 14 days of taking delivery. Read more...