Springtime in the UK is a season of renewal, growth, and, of course, April showers. While the rain nourishes our gardens, it also exposes weaknesses in buildings, homes, and infrastructure. Water ingress can lead to structural damage, mould growth, and costly repairs, making waterproofing an essential part of construction and renovation. Whether you're managing a large-scale project or carrying out home improvements, having the right waterproofing solutions in place ensures long-term protection and durability.
At FixFirm, we understand the challenges you face when it comes to keeping buildings watertight. That’s why we offer a carefully selected range of high-performance waterproofing products designed for various applications. From cement-based repair compounds for concrete structures to flexible PVC membranes for damp-proofing and advanced polyurethane adhesives for sealing, our solutions provide proven protection against water damage.
Let’s take a look at how different waterproofing methods work, how they align with UK Building Regulations and British Standards, and why FixFirm is the go-to supplier of reliable, top-quality waterproofing solutions.
Understanding Waterproofing Bases and Their Applications
Waterproofing products come in different forms, each suited to specific applications. The key is understanding when and where to use each type. Let’s compare the strengths, weaknesses, and best uses of cement-based, PVC membrane, and polyurethane waterproofing solutions.
1. Cement-Based Waterproofing: The Strong Foundation
Cement-based waterproofing is a rigid, durable solution that integrates seamlessly with structural materials. It is best for areas that need permanent, solid protection and where flexibility is not a primary concern. These solutions are ideal for:
- Repairing leaks and cracks in concrete walls, floors, and ceilings.
- Sealing water-retaining structures such as basements, swimming pools, and water tanks.
- Providing an impermeable layer on porous masonry surfaces.
Best for: High water pressure areas that require a strong, long-lasting barrier. Less ideal for: Areas that experience movement, as cement-based waterproofing lacks flexibility.
Recommended product: Feb Water Stop Repair Compound – a fast-setting repair compound that provides an instant watertight seal, even in tough conditions.
Regulatory Compliance:
- BS EN 1504 – Ensures proper repair and protection of concrete structures against water ingress.
- Building Regulations Part C – Covers resistance to moisture and contaminants in buildings.
2. PVC Membranes and Damp-Proof Courses (DPC): The Invisible Barrier
PVC membranes and DPCs provide flexible, pre-applied protection to prevent moisture before it becomes a problem. These are best used in:
- Walls, foundations, and underground structures to block rising damp.
- Cavity trays to redirect moisture away from vulnerable areas.
- New builds and retrofit projects where long-term damp control is required.
Best for: Preventing water ingress in walls and below-ground structures. Less ideal for: Direct repairs, as it is more about prevention than fixing existing leaks.
Recommended products: DPC and Cavity Trays – Essential for keeping walls dry and preventing damp-related deterioration.
100mmx30m Polyethylene DPC Damp Proof Course (P)
Timloc Everdry 225mm Right & Left Handed Stop End Starter Brickwork Cavity Tray - 10031 (P)
Regulatory Compliance:
- BS 8102:2022 – Best practices for protecting below-ground structures against water ingress.
- HHSRS (Housing Health and Safety Rating System) – Ensures safe living conditions by controlling moisture intrusion.
3. Polyurethane Liquid Membranes and Adhesives: The Flexible Defence
Unlike rigid cement-based solutions, polyurethane-based waterproofing is highly flexible and designed to withstand movement and extreme weather. This makes it ideal for:
- Sealing joints and cracks in outdoor structures.
- Waterproofing roofs, terraces, and balconies where exposure to the elements is a concern.
- Providing strong adhesion in humid or fluctuating environments.
Best for: Outdoor and high-movement areas where elasticity is needed. Less ideal for: Areas with high water pressure, where a rigid solution like cement-based waterproofing may be more effective.
Recommended products:
- AWS CO-Polymer All-Weather Sealant – A tough, weatherproof sealant that holds up against even the most extreme conditions.
- OB1 Multi-Surface Sealant & Adhesive – A high-performance, versatile product that provides long-lasting flexibility and adhesion.
- Polyurethane Adhesives – A high-strength bonding solution built to last.
Regulatory Compliance:
- BS 6229 – Industry standard for waterproofing flat roofs and terraces.
- Building Regulations Part L – Ensures energy efficiency and weatherproofing standards are met.
4. Ground-Based Waterproofing Solutions
For below-ground structures and areas prone to rising damp or gas ingress, FixFirm also offers advanced products designed for ground-based protection:
- Z761-120 & Z761-305 Visqueen System – Combined, these products provide a robust barrier to prevent moisture penetration in foundations and basements.
- Z755-1425 Radon Barrier – Ideal for sites requiring enhanced gas resistance as well as waterproofing, ensuring compliance with stringent environmental standards.
Best for: Below-ground projects and structures in high-moisture or gas-exposure environments.
Less ideal for: Above-ground applications where flexibility or direct repair is needed.
5. Vapour Control Membranes: Internal Protection from Damp
Vapour control membranes are essential for preventing moisture from penetrating interior spaces. These high-quality membranes help maintain dry and comfortable living and working environments, making them ideal for:
- Interior walls and ceilings: Protecting surfaces from damp and condensation.
- Renovation projects: Ensuring that upgrades to existing structures remain moisture-free.
- Z753-1450 Vapour Control Membrane: A versatile solution for interior damp prevention.
- Z753-2450 Vapour Control Membrane: Provides enhanced performance for larger interior applications.
6. Bitumen-Based Solutions: Durable, Reliable Waterproofing
Bitumen products are well-known for their durability and proven ability to withstand harsh conditions. A trusted option for heavy-duty applications, they are commonly used to:
- Seal and protect roofing elements.
- Provide a long-lasting moisture barrier.
Recommended products:
- Bitumen Paint M451-075 & M451-077: Reliable, time-tested products for industrial-grade waterproofing and surface protection.
7. Roofing Waterproofing Items: Keeping the Elements Out
Roofing materials face constant exposure to rain, wind, and temperature fluctuations. Having robust waterproofing solutions ensures that roofs remain leak-free and structurally sound.
- Cromapol One Coat Acrylic Roof Coating: A high-performance product designed specifically to seal and protect roofing surfaces from water ingress.
Meeting UK Waterproofing Standards and Regulations
FixFirm’s waterproofing solutions comply with key British Standards and UK Building Regulations, ensuring your projects meet industry best practices:
- BS EN 1504 – Concrete repair and waterproofing compliance.
- BS 8102:2022 – Best practices for waterproofing below-ground structures.
- BS 6229 – Guidelines for protecting flat roofs and terraces from moisture.
- Building Regulations Part C – Resistance to moisture and contaminants.
- Building Regulations Part L – Energy efficiency and weatherproofing requirements.
- HHSRS – Ensures properties remain dry and safe from moisture-related health hazards.
By adhering to these standards, FixFirm provides industry-approved waterproofing solutions, ensuring longevity, safety, and reliability in construction.
Choosing the Right Waterproofing Solution
Selecting the right waterproofing product depends on your project needs:
- Cement-based waterproofing is best for concrete repairs, sealing cracks, and ensuring durability in areas exposed to high water pressure.
- PVC membranes and DPCs are ideal for moisture prevention in walls, foundations, and underground structures.
- Polyurethane membranes and adhesives offer superior flexibility and durability for outdoor applications or environments with structural movement.
Why FixFirm is Your Go-To Waterproofing Supplier
At FixFirm, we don’t just sell waterproofing products—we provide trusted solutions backed by expertise and industry compliance. Our high-quality products ensure your structures remain watertight, durable, and resilient—even against the worst of British weather.
When you choose FixFirm, you benefit from:
+ A diverse selection of industry-leading waterproofing products.
+ High-quality solutions that meet UK Building Regulations and British Standards.
+ Expert guidance to help you choose and apply the right waterproofing materials.
+ A one-stop shop for all your waterproofing needs—saving time, effort, and potential costly repairs.
From basement waterproofing to roof sealing, cavity protection to flexible adhesives, FixFirm has the right solution for your project. So, don’t let April showers dampen your build—explore our waterproofing range today and ensure your structures stand strong against whatever the weather brings!
