Skip to content
Confidence builder icon

Next day delivery

Confidence builder icon

Largest building products ranges in the uk

Confidence builder icon

Trusted technical advice

Confidence builder icon

Need help? Browse our FAQ

Visqueen Ultimate HC Blok

Visqueen Ultimate HC Blok

(no customer review)Add a review
£1,250.04(Inc VAT)
£1,041.70(Ex VAT)
SKU: 2567Category: Waterproofing & Damp Proofing Brand: Visqueen
Visqueen Ultimate HC Blok is a chemically resistant gas barrier. This product is 0.5mm thick, co-extruded and acts as a high-quality volatile organic ... Read full description

This Variant Includes

This item is in these bundles

Visqueen Ultimate HC Blok is a chemically resistant gas barrier. This product is 0.5mm thick, co-extruded and acts as a high-quality volatile organic compound barrier and gas barrier.

Visqueen Ultimate HC Blok features

This gas barrier is gold on the top surface and white on the other side. It's also flexible, multi-purpose and can be secured with tape or welding.

Visqueen Ultimate HC Blok benefits

  • Easy installation and detailing
  • Can be used as a radon and damp proof membrane

Visqueen Ultimate HC Blok Compliances

The Visqueen Ultimate HC Blok complies with the following:

  • It is Agrement certified, which means it has been third-party accredited to meet specific performance standards.
  • It complies with NHBC Foundation's NF94 guidance for use in Type A and Type B membrane locations.
  • It complies with CIRIA C748:2014, the industry standard for VOC protection.
  • It complies with the methane gas transmission rate, mass per unit area and thickness requirements of BS 8485:2015 + A1:2019, the industry standard for methane and carbon dioxide protection.

    Size: 2.44M x 41M x 0.5mm (100m2)

    Download Visqueen Ultimate HC Block Datasheet (PDF)

    Estimated delivery 1-2 working days to UK mainland



Delivery and Return

Charges start from £6.90 inc vat on small, lightweight orders and £22.50 inc vat on heavier or difficult to transport items.

All small item orders with a value of £100.00 inc vat will be carriage paid.

All large item orders with a value of £200.00 inc vat will be carriage paid.

*small or large classification of items are determined by weight and dimension of product*

Please note that your order may need to be split into separate packages if over 30KG.

All of the above is based on UK Mainland deliveries, further charges may be incurred if the delivery address is outside of this.

We are also currently unable to deliver outside of the UK on our regular carrier so if you require delivery outside the UK please call or email the details to the office as we reserve the right to refuse service or refund orders based on this.

Guarantee next day delivery.

Some of our products have a note that states – if ordered before 1pm and being delivered to UK mainland on a next day basis.

Please note that given the current circumstances alot of carrier companies are struggling to keep up with demand and although we do book these deliveries as next day services, the carriers cannot always fulfil these and an extra day may be required.

A high percentage of our advertised goods are stock items but be aware that if you are taking very large quantities of stock that we may not be able to fill your order fully on first delivery. Please call the office to check to not be disappointed.

We are also an active trade counter and part of a larger network of companies so stock can be taken at any time but we will always aim to deliver your goods as soon as possible.

Also if ordered along side goods that we cannot guarantee next day delivery on, these will be delivered based on the schedule of the other item.

Signature required on delivery.

The carrier we currently use requires a signature for all deliveries as a proof of delivery. If you cannot guarantee someone will be home to receive this please leave delivery instructions for a safe place or neighbour to leave your goods with. Due to covid and new contactless deliveries, our carriers will not require a signature but will take down the recipients name as POD.

If no one is available to take the delivery, the courier will leave details at the address to rearrange delivery or may leave with a neighbour. Note we may need to make an additional handling charge for the return and re-delivery if a package is unable to be delivered multiple times due to no one being home to receive this. Due to covid our carriers are restricting the number of re-delivery attempts.

After three attempted deliveries our carrier will return the goods to ourselves and in this worst case situation, we may cancel the order and refund your money, excluding any additional charge for the return and re-deliveries.

Materials delivered from our own stock.

Normally 1 – 2 days (this can sometimes be longer if we are waiting for manufacturers’ stock to arrive into ours).

If the order is placed before 1:00pm and all of the items are in stock, then we will endeavour to dispatch your order same day for delivery the following day.

This still applies for deliveries out of our local area but please note that we use independent carriers so be aware that there may be external factors which we cannot control (e.g Far out postcodes or local traffic situations)

Materials delivered direct from the manufacturer.

There may be some occasions when it is more efficient or cost effective to have the materials shipped direct from our suppliers to the customer.

We will place the order immediately upon receipt of your order but this can sometimes take a few working days depending on the manufacturers production schedule or carrier used.

We will always endeavour to get the goods to the customer at the earliest possible date but if these are urgently required, please speak to us to check.

Please note that many manufacturers will offer a next day delivery service at an increased delivery cost and also a cut of time for this order to be placed (usually around 11am / 12pm)

Please call us on 08454 530 017 between 8am and 5pm Monday – Friday or email us on [email protected] for any delivery queries, or urgent requirements.

Please read our full terms and conditions with regard to full details on deliveries.

Visqueen Ultimate HC Blok holds the following certifications and approvals:

  • Third party accreditation (BDA certifcate BAF-18-051-P-A-UK)

  • Complies with CIRIA C748:2014

  • Conforms to the specifcation requirements of BS 8485:2015 + A1:2019

  • Suitable for all Characteristic Gas Situation (CS) ground gas regimes

  • Conforms to the specifcation requirements of NHBC Amber 1 and Amber 2 applications

  • Conforms to the specifcation requirements of BR 211:2015

  • CE Mark EN 13967:2012

  • Quality Management System ISO 9001:2015

  • Occupational Health and Safety System ISO 45001:2018

  • Environmental Management System ISO 14001:2015

To install Visqueen Ultimate HC BLOK:

  • Loosely lay the membrane on the substrate with the gold side up as to avoid sunlight glare. It should be overlapped by at least 150mm, bonded with Visqueen Ultimate Double Sided Jointing Tape and sealed with Visqueen GR Lap Tape.

  • Form airtight seals around all service entry points by using Visqueen Ultimate Top Hat Unit. The base of the top hat and the upstand should be bonded using Visqueen Ultimate Double Sided Jointing Tape and sealed with Visqueen GR Lap Tape. The upstand should be secured with the supplied jubilee clip.

  • Cover the membrane with a protective layer as soon as possible after installation to prevent damage.

The following safety precautions should be followed when handling and installing Visqueen Ultimate HC BLOK:

  • Employ safe lifting procedures when handling rolls.

  • Wear safety shoes when handling rolls.

  • Wear heavy duty gloves to protect against skin abrasion or cuts.

The barrier is positioned above or below a solid concrete ground floor slab or above a precast suspended segmental ground floor system creating a 0.5mm thick, chemically resistant co-extruded volatile organic compound barrier and gas barrier.

Yes, Visqueen Ultimate HC Blok is suitable for use in all types of buildings and can be used in basements and crawlspaces.