Flood Prevention & Surface Water Management

Flooding on a commercial site is rarely just about the weather. It's usually a sign that the surface water system can't cope, whether that's a lack of capacity, poor design, years of silt build-up, or a site that's changed use without the drainage being updated to match.

ICE Drainage provides flood prevention and surface water management across London and the Home Counties, helping hospitality venues, commercial property teams, and facilities management reduce flood risk and keep sites safe, operational, and protected from avoidable water damage.

What is flood prevention and surface water management?

It's the process of understanding where and why water is causing problems on your site, then putting the right combination of design, installation, and maintenance in place to control it. Depending on the site, this can include:

• Assessing overall flood risk across a site or portfolio
• Identifying capacity, design, or maintenance failures in existing drainage
• Recommending and installing the right surface water solutions
• Building a maintenance plan to stop the problem coming back
• Supporting compliance and planning requirements around surface water

The goal is always the same: keep water moving away from your site instead of sitting on it.

Signs your site has a flood risk problem

You may need a flood prevention review if you're seeing standing water or ponding after rainfall, flooding at entrances, car parks, or loading bays, water tracking into buildings during heavy rain, gullies or channel drains that overflow or back up, recurring flooding in the same spot year after year, or damage to surfacing, landscaping, or building fabric linked to persistent water.

On hospitality and customer-facing sites, even occasional flooding can mean safety incidents, complaints, and lost trade.

Common causes of flood risk on commercial sites

Flood risk usually comes down to a combination of the following: insufficient drainage capacity for the catchment area, poor gradients or falls sending water to the wrong place, silted or blocked gullies, channels, and catch pits, failed or undersized soakaways and attenuation systems, site changes such as new paving or extensions that added runoff without added capacity, and damaged or collapsed underground pipework restricting flow.

Understanding which of these is driving the problem is the first step to fixing it properly, rather than treating the same flood every winter.

Our approach: assess, design, install, maintain

1) Site assessment and risk profiling

We review where water is collecting, where it's coming from, and why. This includes checking existing gullies, channels, and catch pits, assessing ground conditions and infiltration potential, reviewing falls and surface levels, and identifying any constraints around access, utilities, or planning requirements.

2) Recommendations

We recommend the most practical solution for your site and risk level. Depending on what we find, this might involve new or upgraded channel drains and gullies, silt traps or catch pits to protect the wider system, a soakaway or attenuation system to manage runoff, or French and land drainage to deal with groundwater and waterlogged ground.

3) Installation

We install with long-term performance in mind, focused on correct falls, suitable materials, and access points that make future maintenance straightforward rather than difficult.

4) Planned maintenance

A flood prevention system only keeps working if it's maintained. We can build a planned schedule that includes routine gully and catch pit cleaning, silt and debris removal, and inspection of key components, so the system keeps performing through the seasons that matter most.

Flood prevention for hospitality and FM portfolios

We commonly support hotels and leisure sites with large car parks and roof areas, restaurants and pubs where external areas need to stay safe and usable, facilities management teams managing multi-site flood risk, and schools and public buildings with waterlogged grounds. If you manage a portfolio, we can help standardise how flood risk is assessed and maintained across your sites.

Minimising disruption on live sites

Flood prevention work often involves excavation in operational areas. We can plan around trading hours, delivery and loading bay access, permit-to-work processes on FM-managed sites, and out-of-hours windows where required, so the fix doesn't create as much disruption as the problem it's solving.

Why choose ICE Drainage?

• A commercial-first approach for hospitality and FM
• Coverage across London and the Home Counties
• Evidence-led recommendations, not guesswork
• Practical, maintainable solutions designed to reduce repeat flooding
• Credentials including Safe Contractor, SSSTS, and Constructionline Gold

ICE Drainage is a specialist service expansion of ICE Cleaning, a leading sewage cleaning company in the UK.

Book a flood prevention and surface water review

If your site keeps flooding and you want to understand why, ICE Drainage can help.

Contact ICE Drainage today to arrange a site survey. We'll assess your flood risk, recommend the right fix, and help you keep your site safe and operational.