Whether you’re experiencing water ingress, planning a basement conversion or constructing a new below-ground structure, Ventil8ed provides the complete design, supply and installation of professional basement waterproofing systems.

Our surveyor holds the industry-recognised CSSW (Certified Surveyor in Structural Waterproofing) qualification, allowing us to investigate, design and specify waterproofing systems in accordance with BS8102:2022 – Protection of Below Ground Structures Against Water Ingress.

Every property is different, which is why we never adopt a one-size-fits-all approach. Our recommendations are based upon the construction of the building, the surrounding ground conditions, the intended use of the space and the level of waterproofing protection required.

Whether working within a modern home, commercial development, listed building or historic structure, our objective remains the same:

One of the biggest misconceptions surrounding basement waterproofing is that water enters because the building has failed.

In reality, below-ground structures are naturally subjected to moisture within the surrounding ground. During periods of heavy rainfall, groundwater builds against external walls and floor slabs, creating hydrostatic pressure.

Over time, water will always seek the path of least resistance, travelling through porous masonry, construction joints, service penetrations and structural defects.

Successful waterproofing is therefore not simply about stopping water — it is about understanding how water behaves and designing a system that safely manages it throughout the life of the building.

The success of any waterproofing system begins long before the first membrane or coating is installed.

Before recommending any waterproofing solution, our CSSW Qualified Surveyor will assess:

• Construction type
• Existing waterproofing systems
• Groundwater conditions
• Hydrostatic pressure risk
• Existing drainage
• Intended use of the basement
• Future maintenance requirements
• Risk category in accordance with BS8102:2022

Only after completing this assessment do we specify the most appropriate waterproofing strategy for your property.

Unlike many contractors who simply install products, Ventil8ed provides a complete waterproofing service.

Investigate

Every project begins with understanding why moisture is entering the structure.

Design

Our waterproofing strategy is designed specifically for your building, ensuring the proposed system is suitable for the environment and intended use.

Supply

We specify and supply recognised waterproofing systems from leading manufacturers, ensuring quality materials are used throughout every installation.

Install

Our experienced installation team completes every project to the highest professional standards, ensuring workmanship reflects the quality of the waterproofing design.

Maintain

Where required, we also provide servicing and maintenance of sump pumps, drainage channels and associated waterproofing components to help ensure long-term performance.

Type A – Barrier Protection

Type A waterproofing systems create a waterproof barrier directly onto the structure using specialist waterproof coatings and membranes.

These systems prevent moisture passing through the walls and floors and may be suitable where groundwater conditions permit or as part of a combined waterproofing design.

Type C – Drained Protection

Type C Waterproofing, often referred to as a Cavity Drain Membrane System, is one of the most reliable forms of basement waterproofing available.

Rather than attempting to resist water pressure, specialist cavity drain membranes safely manage water by allowing it to pass behind the internal lining into concealed perimeter drainage channels.

Collected water is then discharged via an automatic sump and pump system before it can enter the internal environment.

Because water is managed rather than resisted, Type C systems are maintainable, serviceable and widely recognised as one of the preferred waterproofing methods for creating dry, habitable accommodation below ground.

Converting a basement or cellar into additional living accommodation can significantly increase both the usable space and value of a property.

Whether creating a home office, cinema room, gymnasium, utility room, wine cellar or additional living accommodation, effective waterproofing provides the foundation for every successful conversion.

Our professionally designed waterproofing systems create dry environments ready for insulation, plastering and final finishes.

Historic buildings require specialist knowledge and sympathetic repair techniques.

Traditional masonry behaves very differently to modern construction, and inappropriate waterproofing methods can often create more problems than they solve.

Ventil8ed regularly works within listed buildings, churches and heritage properties, designing waterproofing solutions that protect the historic fabric while meeting modern performance standards.

• CSSW Qualified Structural Waterproofing Surveyor
• Professional Design, Supply & Installation Service
• Waterproofing Designed to BS8102:2022
• Type A & Type C Waterproofing Specialists
• Basement Conversion Specialists
• Heritage & Listed Building Experience
• Sump Pump Installation & Servicing
• Waterproofing Maintenance
• Honest Professional Advice
• Free No-Obligation Surveys

For additional peace of mind, qualifying waterproofing installations can be provided with a 10-Year Insurance Backed Guarantee (IBG) through QANW (Quality Assured National Warranties).

Unlike a standard contractor guarantee, an Insurance Backed Guarantee continues to protect the installation should the original contractor cease trading during the guarantee period.

This provides additional reassurance for homeowners, landlords, developers, surveyors and mortgage lenders that the waterproofing system has independent protection.

Why is my basement leaking?

Groundwater naturally builds against below-ground structures. Over time, hydrostatic pressure forces moisture towards the building where it may enter through porous masonry, construction joints or structural defects.

What is the best basement waterproofing system?

There is no single solution suitable for every building. The correct waterproofing system depends on the property, the ground conditions and the intended use of the space.

Do I need a sump pump?

Not every basement requires a sump pump; however, where a Type C waterproofing system is installed, a sump and pump arrangement is often used to safely discharge collected groundwater.

Can you waterproof listed buildings?

Yes. We regularly design waterproofing solutions for listed buildings, churches and heritage structures using sympathetic methods appropriate to traditional construction.

Do you provide guarantees?

Yes. Qualifying installations can benefit from a 10-Year QANW Insurance Backed Guarantee, providing additional peace of mind beyond the contractor’s own guarantee.

Whether you’re experiencing basement water ingress, planning a cellar conversion or require professional waterproofing advice, Ventil8ed can help.

Contact our team today to arrange your free, no-obligation survey and discover how a professionally designed waterproofing system can protect your property for years to come.