servicesStructural Waterproofing

Advanced structural waterproofing solutions

Protecting structures from water, before it becomes damage

Water is relentless. It seeps into cracks, moves through joints and slowly undermines concrete and steel. Unchecked moisture leads to freeze-thaw damage, chloride attack and corrosion — all of which shorten service life and increase whole-life costs.

Our structural waterproofing solutions aren’t about surface coatings or quick fixes. They’re engineered systems designed to stop water where it starts — at the structure — and keep it out over the long term. We apply waterproofing that protects concrete assets such as car parks, podium decks, basements and slabs so they remain durable, compliant and fit for use.

  • Where We Work

  • Top deck car parks

  • Podium slabs and amenity decks

  • External ramps and exposed walkways

  • Concrete basements and plant rooms

  • Waterproof render systems for structural walls

Waterproofing systems designed around the structure

Effective waterproofing starts with understanding how a structure moves, how it is used and where water pressure is coming from. No two assets behave the same. A top-deck car park exposed to weather behaves very differently to a basement slab subject to hydrostatic pressure.

We install liquid-applied waterproofing membranes, crack-bridging systems and damp-proof barriers that form continuous, seamless protection. These systems are flexible enough to accommodate movement while remaining fully watertight. Detailing around joints, penetrations, upstands and interfaces is treated as critical, not secondary. This is where most failures occur, and where careful workmanship matters most.

All systems are selected to suit the exposure conditions, expected movement and required service life of the structure. Where required, waterproofing is integrated with repair works so that defects are addressed before protection is applied.

  • Our Process

  • Initial Assessment

    We start with a thorough substrate inspection, moisture testing, and detailing of vulnerable areas. This ensures our waterproofing solution is tailored precisely to your structure’s condition and use.

  • System Selection

    We work with industry-leading manufacturers such as Sika, Triflex, and PCP Europe to specify waterproofing systems that suit your structure, whether it’s a podium, top deck, ramp, or below-ground space. All systems comply with BS 8102, BS EN 1504, and relevant local design codes.

  • Application

    We install liquid-applied waterproofing membranes, crack-bridging systems, and damp-proof barriers, using fast-curing MMA, polyurethane, or hybrid resins depending on the structure and access limitations. We also offer coatings that provide skid resistance and UV stability.

  • Details & Interfaces

    Critical interfaces — such as upstands, joints, and penetrations — are detailed using reinforced banding or flexible sealants to ensure continuous, defect-free protection.

Where waterproofing makes the biggest difference

Every project begins with an assessment of the structure and the source of water ingress. This allows the waterproofing strategy to be based on cause rather than assumption. We then specify systems from trusted manufacturers that suit the environment, programme constraints and performance requirements.

Installation is carried out by trained teams with close attention to preparation and detailing. Substrates are prepared properly, interfaces are reinforced, and curing times are managed to ensure system integrity. Where access or downtime is limited, fast-curing systems are used to allow areas to be returned to service quickly.

The end result is a waterproofing system that works as part of the structure, not as an afterthought.

  • Why Choose H3 Construct?

  • Specialist installers of Sika, Triflex, and PCP waterproofing systems

  • Fast-curing systems to minimise downtime

  • Technical support from survey to installation

  • Long-term protection with warranty-backed systems

  • Trusted by clients including Q-Park, Landsec, and The EV Network

Talk to H3 Construct today on 01204 358176 about your project needs or drop us a message

Drop us a message

Chas Accredition Elite

Constructionline Gold Member

Call us on 01204 358176
admin@h3construct.co.uk

H3 Construct Ltd
Registered Company #12263157
375 Tonge Moor Road, Bolton, BL2 2JR

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