Zerodec: Engineered Internal Cladding

About Us

Gillespie UK is now the largest volume manufacturer, and lowest cost producer of 3D GRG in Europe. This brings greater certainty of supply, and continuity of delivery to large projects, reducing risks to programme extensions, and cost overrun.

Throughout 50 years of continuous material production, Gillespie has constantly sought to implement improvements in product manufacturing and processes. In 2020, Zerodec provides the most geometrically accurate engineered GRG available, designed using 3D modelling software, created using CNC moulding technology, and the highest quality raw materials:

Zerodec is cured using a unique bespoke de-humidification and drying process to extract maximum moisture from the finished product, creating a stronger, drier, more stable material, providing the highest quality GRG cladding material available.

Zerodec has been independently tested and certified at Warrington Fire & Research, in accordance with the latest regulations, to BS 476 Pts 4 & 7 and complies with ASTM C1355

Advantages of Off- Site Manufacture

The benefits of off-site Manufactured Zerodec to any project, are a combination of:

Superior quality

Consistent Engineered material produced in factory conditions

Improved Programme time

Less setting out, lower labour requirements, reduced snagging

Reduced Risk

Less risk to operatives, and commercially to the project

Certified Tested Solutions

Confidence that the material will contribute to a safer construction

Benefits of selecting the Off-site Manufactured Solution

British Aviation group logo
Green achiever logo
Warringtonfire certificate
Approved contruction line accredited
warringtonfire certificate blue

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Abbey House,
282 Farnborough Road,
GU14 7NA


Gillespie management, sales, design office and accounts based in Farnborough, UK. Our factories have a permanent staff of 40+, and additional staff are added for larger projects, should we need to supplement to meet programme requirements.

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