Introducing FireBlox™: The all-new cavity fire barrier tested for use with SFS

Introducing FireBlox™: The all-new cavity fire barrier tested for use with SFS

Grayson FireBlox™ is a brand-new non-ventilated cavity fire barrier that has been fully tested for use with Steel Framing Systems (SFS) and comes with a market-leading A1 fire rating.

Designed for use within external wall cavities of up to 600mm, the foil encapsulated Fireblox™ is suitable for a wide range of sector applications and on-site uses, including the junction of compartment floors and around openings.

What’s more, the product can also be supplied with an integral damp proof course, helping to save additional procurement and installation costs.

Robust fire resistance for up to 120 minutes

FireBlox™ has undergone rigorous testing to ensure it provides a high level of insulation while also preserving the integrity of the building structure in the event of a fire.

Thanks to the product’s class A rating, it provides up to 120 minutes of fire resistance when used within external cavity walls, and has been tested for use in conjunction with masonry support brackets.

Testing has also been carried out to ensure the effectiveness of FireBlox™ within SFS systems with calcium silicate fibre cement boards.

Easy installation

Alongside its versatility and high fire resistance, the FireBlox™ is also extremely easy to install, saving you on-site labour costs and helping you to avoid unnecessary delays to your project.

Whilst the exact installation process varies depending on the cavity size (and whether the product is installed vertically or horizontally), FireBlox™ comes in 605 x 1000 x 100mm deep slabs and requires only 5mm of compression when fitting. It can be easily cut to size on site to suit your cavity.

Best of all, installing the FireBlox™ doesn’t require any specialist equipment, simply:

  • A masonry drill and drill bits to suit the fixings
  • A screwdriver and stainless screws
  • A measuring tape
  • A saw or knife for cutting

Once installed, no active maintenance is required for the FireBlox™, providing peace of mind that the structure will stay protected in the event of a fire.

To find out more about FireBlox™, contact your account manager on 08448 50 40 50.

read more
Futureproofing your projects: Keep air, vapour and fire under control with the reinforced Visqueen A2 Vapour Barrier

Futureproofing your projects: Keep air, vapour and fire under control with the reinforced Visqueen A2 Vapour Barrier

In modern day construction, a vapour barrier must go beyond simply restricting the passage of moist air within floor, wall and roof constructions.

With fire safety an ever-increasing cause for concern, it must also help safeguard building inhabitants from the preventable spread of fire, and that’s precisely what the Visqueen A2 Vapour Barrier does.

By working to keep air, vapour and any possible fires under control, this reinforced aluminium control layer helps to futureproof your building projects in more ways than one.

Why choose the Visqueen A2 Vapour Barrier?

The Visqueen name has long been recognised as one of the leading manufacturers of advanced membrane technologies, and it’s not hard to see why.


The design and manufacture of the A2 Vapour Barrier ensures a number of market-leading benefits, including:


  • Reduced interstitial condensation – Thanks to the A2 Vapour Barrier’s multi-layer aluminium structure, it can effectively reduce the risk of interstitial condensation occurring, thus protecting the wooden and metal elements of a building.
  • Greater fire protection – With a high fire classification of A2 – s1 d0, this product is completely non-combustible and produces little to no smoke and no flaming droplets during combustion. This ensures both the structure and any building inhabitants are better protected.
  • Versatile application – Suitable for use within floor, wall and roof constructions, the Visqueen A2 Vapour Barrier can be used across multiple projects for humidity classes 1, 2, 3, 4 and 5. This versatility makes for a much simpler procurement process.
  • Easy installation – Unlike other vapour control layers on the market (which are folded), this product is supplied in single wound rolls, making for easy and rapid installation on site.

Approvals and Standards

Our focus here at Grayson has always been procuring the highest quality construction consumables from the most reputable manufacturers, so it will come as no surprise that approvals and standards are important to us.

Unsurprisingly, the Visqueen A2 Vapour Barrier comes with multiple seals of approval:

  • Achieves a reaction to fire classification A2 – s1, d0 to BS EN 13501-1:2018
  • BS 5250:2021 Management of moisture in buildings – code of practice
  • UKCA CE UKNI Mark EN 13984:2013
  • Quality Management System ISO 9001:2015
  • Occupational Health and Safety System ISO 45001:2018
  • Environmental Management System ISO 14001:2015

For more details on the Visqueen A2 Vapour Barrier or Grayson’s other vapour control products, contact your account manager on 08448 50 40 50.

read more
Extra-long cavity wall ties

Extra-long cavity wall ties

As the materials used within cavity walls continue to change in response to new and updated building regulations, so too does the size of the cavities themselves.

Over the years, we’ve seen a substantial increase in demand for longer cavity ties here at Grayson, which is why we stock Type 1 ties in 325mm and 350mm as standard.

These extra-long cavity wall ties, made of high-grade austenitic stainless steel, provide our customers with a high load-bearing solution to building stability and are available for next day delivery.

Expertly engineered

The 2000 Range Wall Tie, which includes the extra-long 325mm and 350mm sizes, has been expertly engineered by ACS to be sufficiently safer than all other formed ties on the market today.

What’s more, the manufacturers have incorporated a range of other innovative design features to aid the installation process:

2000 Range Wall Tie

Additional benefits include:

  • An integrated drip feature that provides advanced water and moisture dissipation, even in angles of up to 5°.
  • The product is fire-rated Class A1, making it ideal for non-combustible cavity requirements.


Do I need extra-long cavity ties?

With the England and Wales Building Regulations* now allowing for cavities up to 300mm in width, it’s no surprise that increased cavity sizes are becoming more prevalent in the industry.

*Approved Document A, Table 5, Cavity Wall Ties

1. Where face insulated blocks are used the cavity width should be measured from the face of the masonry unit.
2. The embedment depth of the tie should not be less than 50mm in both cases.
3. For cavities wider than 175mm calculate the length as the nominal cavity width plus 125mm and select the nearest stock length. For wall ties requiring embedment depths in excess of 50mm, increase the calculated tie length accordingly.

Based on the latest regulations, our extra-long wall ties are best suited to projects where two masonry walls are separated by a nominal cavity width of at least 176mm.

For further details on the extra-long 2000 Range Wall Tie or any of Grayson’s other masonry metalwork products, contact your account manager on 08448 50 40 50.

read more
Futureproof your build with the UK’s first fire-rated sealing system

Futureproof your build with the UK’s first fire-rated sealing system

The inclusion of fire safety measures in the early stages of a construction project is one of the most effective ways to minimise fire risks and protect lives. This includes using high-performing fire-rated membranes to seal vulnerable interfaces like windows, balcony doors, and parapets.

At Grayson, we supply several quality membranes and adhesive pastes that when used together, provide stability and integrity in case of a fire.


The Grayson fire protection range

The flexible fire-rated membranes are used for sealing interfaces on construction projects. Made from coated glass fibre, they provide a strong bond to most common building substrates when used alongside the suitable adhesive pastes.

Depending on the building regulations that apply to your unique construction project, we supply two ranges that achieve different fire classifications:

two ranges that achieve different fire classifications

Beyond combustibility

The durability of a building depends on more than just fire resistance. When building for both safety and longevity, it’s essential to use fire-safety products that also consider:

  • The movement of air
  • The movement of moisture
  • The effects of UV radiation

In addition to its high fire classification, these systems also provide an airtight and weathertight seal and high UV resistance. This makes it a quality alternative to standard EPDM membranes, which can degrade under solar UV radiation.


For further details on the Grayson fire-rated sealing system or Grayson’s other fire safety products, contact your account manager on 08448 50 40 50.

read more
Protect against wind-driven rain with the BBA approved expanding foam tape

Protect against wind-driven rain with the BBA approved expanding foam tape

When it comes to sealing window reveals and other construction joints, traditional methods like sealant and backer rods often fail to sufficiently protect against wind-driven rain.

Here at Grayson, proof of performance has always been of the utmost importance to us, which is why we stock only BBA approved expanding foam tape that meets the stringent requirements of DIN standards.

Designed specially for sealing construction joints in buildings up to 100m high, this versatile and vapour permeable tape protects against wind, dust, and driving rain up to 600 Pa (equivalent to wind force 11).


Versatile application


The Grayson expanding foam tape is available in 8 different thicknesses, meaning it can sufficiently seal and protect joints that range from 1mm to 42mm in size.

This makes it suitable for a wide range of applications, including sealing joints in areas such as:

  • Door and window installations (including skylights)
  • Steel and timber-framed buildings
  • Prefabricated concrete
  • Modular constructions
  • Cladding panels and curtain walling

Once applied, this self-adhesive and pre-compressed foam expands into the cavity gap, creating an effective seal. At 0% compression, it is suitable for debris sealing. At 75% compression, it can protect from 70mph wind-driven rain.


Well-designed means high standards


Despite being designed predominantly as an elastic weather seal, the advantages of the Grayson expanding foam tape extend beyond driving rain protection.


This includes:

  • Fire-resistance – The material is impregnated with fire-resistant polymeric dispersion
  • Warmth and sound – The tape possesses outstanding thermal and acoustic characteristics
  • Longevity – Permanent elasticity means a long-term life expectancy

All of these unique design qualities make for a product that complies with the most stringent of requirements, including:

  • DIN 18542 edition 2009 DIN 18055
  • ISO 9001
  • CE-Certified

For more details on our expanding foam tape, contact your account manager on 08448 50 40 50.

read more
Coloured Timloc Airbricks: Ventilation that blends in no matter the project

Coloured Timloc Airbricks: Ventilation that blends in no matter the project

Coloured Timloc Airbricks

Obstructed airflow within hollow floors can wreak havoc on timber joists and floorboards, particularly in the winter when rooms cool and central heating kicks in.

As with all condensation-related problems, ventilation is the only treatment.

With the Timloc Combination Airbrick, you can create clear airflow passages to these void spaces and significantly reduce further moisture by preventing the entry of wind-driven rain.

Sold in a range of colours, this robust, durable, and decay-resistant solution is available in large stocks here at Grayson.


Unique Design Benefits

The Timloc Combination Airbrick has been designed with several unique features and subsequent benefits. Whilst the stepped front grille provides unobstructed airflow and prevents the ingress of water, the integral ‘clip together’ facility allows multiple bricks to be stacked to form 9” x 6” and 9” x 9” sizes.

This is hugely beneficial where larger than average ventilation is required, such as in large residential homes and period industrial and commercial premises.

The airbrick is also available in multiple colours, meaning it can blend in with a range of brick types across a range of projects. This includes:

Coloured Timloc Airbricks

Versatile Uses

The versatility of the combination airbrick extends beyond vent size and brick colour.

When used in conjunction with cavity sleeves, it provides natural air ventilation through external walls to a building interior.

Alternatively, when used with the Timloc Telescopic Underfloor Airvent (which can be adjusted vertically between three and five brick courses), it can also be used to ventilate below suspended ground floors.


Quality Standards

  • 6.5mm wide front grille opening complies with BS 5440 Pt 2 and British Gas requirements
  • Satisfies all NHBC requirements
  • Manufactured to BS EN ISO 9001 and BS EN ISO 14001
  • Complies with all relevant Building Regulations and meets all relevant British Standards
  • Equivalent area marking to the front face is compliant with BS EN 13141-1:2004


For more details on our stock of Timloc Combination Airbricks and Telescopic Underfloor Airvents, contact your account manager on 08448 50 40 50.

read more