With more than ten years experience on major construction projects across London, I have worked alongside Tier 1 contractors and gained direct insight into the recurring challenges faced on construction sites.
One of the most persistent issues has been the inefficiency of temporary water protection. A process that often consumes significant time and resources while generating avoidable waste. A common example is the use of timber boxes externally painted with a waterproofing membrane around pipe penetrations, which are typically discarded when they are no longer required.
To solve this, I developed the Barney Bund: a reusable, quick-to-install system designed to streamline installation, minimise site waste, and provide reliable, cost-effective protection for every stage of the build.
Barnaby Hunt, Inventor and director of the Barney Bund.
What is the Barney Bund?
The Barney Bund is a modular pipe bund system designed to temporarily seal around core-drilled holes up to 250mm in diameter. It prevents water ingress and debris entry while your project remains exposed to the elements — and it’s built tough enough to reuse across multiple jobs.
This is the first product in a growing range of modular bunds designed for the rigours of UK construction sites. Simple. Fast. Reusable.
How it works
The modular bunding solution built for speed, reuse, and real-world worksites.
1
Clear the installation area of dust and debris.
2
Position the bund over the core hole.
3
Mark the four fixing points using the bund base.
4
Drill four 6mm holes, 75mm deep into the slab.
5
Fix the bund using the provided bolts, tightening gradually in sequence (10–15mm at a time) until compressed and sealed.
6
Install the lid as shown in the video.
7
In wind-prone areas, add 4 secondary self-tapping screws to secure the lid.
8
Reuse with confidence. When the area is no longer at risk, remove the bund and store it for future use — zero waste, zero faff.
Why Choose the Barney Bund?
Rapid, Reliable Installation
Installs in under 4 minutes
No carpentry or custom fixings required
Clear instructions and video guidance
Reusable, Cost-Saving & Sustainable
Fully reusable and built to last: no timber or waste
Stackable & Space-Saving
Lower Carbon Footprint
Faster, Cleaner Installs
Safety First
High-visibility to minimise trip and fall risk
Covers exposed core holes
Helps protect services and workers
Multi-Purpose Protection
Shields works from water and debris
Prevents water ingress
Useful across multiple build stages
Designed & manufactured in the UK
3D CAD - Concept Design - Engineering
Prototyping - Production
Designed for Growth
Full range (coming soon)
Future-proof modular system
Ideal for tier 1 contractors, subbies, and safety teams
Find out what people are saying about Barney Bund
Simple and Effective
“Why hasn’t this been done before? It’s such a simple and effective solution to the problem.”
Really worked!
“The Bund held up well over the weekend.
It rained a lot!”
Saved a lot of work
“The Bund saved us a ton of hassle on-site. Quick to install, reusable, and miles better than timber.”