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Structural Waterproofing

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High quality Structural Waterproofing products

Structural waterproofing products in construction encompass a broad range of materials and systems designed to prevent the ingress of water into building structures and below-ground spaces. These products are vital for protecting foundations, basements, and below-grade structures from water damage, dampness, and deterioration. The classification of waterproofing systems into Type A, Type B, and Type C is outlined in British Standard 8102:2022, which provides guidance on waterproofing design and installation practices.

Type A Waterproofing Systems


Type A waterproofing systems, also known as barrier waterproofing systems, involve the application of waterproof membranes or coatings to either the external or internal surface of the structure. These membranes create a barrier that prevents the passage of water into the building envelope.

Examples of Type A waterproofing systems include sheet membranes, liquid-applied membranes, cementitious coatings, and bituminous coatings. These materials are applied directly to the exterior or interior surfaces of below-ground structures, such as basements and substructures.

Installation of Type A waterproofing systems typically involves surface preparation, application of the waterproofing membrane or coating, and detailing around penetrations, joints, and transitions. Proper installation is critical to ensure continuity and integrity of the waterproofing barrier.

Type B Waterproofing Systems


Type B waterproofing systems, also known as structural integral waterproofing systems, involves ensuring that the concrete structure itself acts as a barrier to water. This is achieved by ensuring that penetrations and gaps in the concrete, such as construction joints and service entries, are sealed, and sometimes by also incorporating waterproofing additives or admixtures into the concrete used in the construction of the structure. These additives enhance the properties of the concrete itself.

Examples of Type B waterproofing products include waterbars, injection resin systems, and joint sealing systems, and may also include crystalline admixtures, hydrophobic admixtures, and polymer-modified additives. These materials are mixed with the concrete or mortar during the batching process.

Installation of Type B waterproofing systems is integrated into the construction process. Proper concrete placement, curing, and protection practices are also essential to ensure the effectiveness of the waterproofing.

Type C Waterproofing Systems


Type C waterproofing systems, also known as drained cavity systems or cavity drain systems, involve the installation of internal cavity membranes and drainage channels to manage and control water ingress within the structure. These systems collect and redirect water to sumps or drainage points for removal.

Installation of Type C waterproofing systems involves fixing drainage membranes or channels to the internal surfaces of the structure, creating a cavity or void space behind the membrane for water collection. Other products in Type C waterproofing systems include drainage channels, sump pump systems, and backup and control devices.

The Importance of Proper Waterproofing Systems


Structural waterproofing products play a crucial role in protecting buildings and below-ground structures from water damage, dampness, and deterioration. By implementing effective waterproofing measures, construction professionals can ensure the long-term integrity and durability of buildings, safeguarding against costly repairs and structural failures.

When selecting structural waterproofing products for a construction project, factors such as site conditions, building usage, groundwater levels, and local regulations should be considered. It's essential to consult with waterproofing specialists and adhere to industry standards and best practices to ensure the proper design, installation, and maintenance of waterproofing systems. Additionally, periodic inspections and maintenance are essential to monitor the performance and integrity of waterproofing systems over time.

What Structural Waterproofing brands do we stock?


We stock and supply a choice of sealants, adhesives and primers from a choice of brands, with options covering different application scenarios and product requirements. This includes products from Cetco, Diasen, Filoform, FIXA, Hauff-Technik, Newton Waterproofing Systems, RiveStop and Visqueen.

Frequently Asked Questions About Structural Waterproofing

Structural waterproofing refers to the use of materials and systems to prevent the ingress of water into building structures and below-ground spaces. It is essential for protecting foundations, basements, and below-grade structures from water damage, dampness, and deterioration, ensuring the longevity and integrity of the building.

The common types of structural waterproofing systems include Type A (barrier), Type B (integral), and Type C (drained cavity) systems. Each type of system has its own characteristics and applications, providing effective protection against water ingress in different scenarios.

The selection of a waterproofing system depends on factors such as site conditions, building usage, groundwater levels, and local regulations. It’s essential to consult with waterproofing specialists and consider the specific requirements of the project to determine the most suitable system.

Yes, structural waterproofing can be applied to existing buildings through retrofitting and remedial measures. Depending on the site conditions and the extent of water ingress, various waterproofing solutions, such as Type C drained cavity systems, can be implemented to address existing water ingress issues.

The longevity of structural waterproofing systems depends on factors such as the quality of materials, installation techniques, environmental conditions, and maintenance practices. Well-designed and properly installed waterproofing systems can last for many years, providing long-term protection against water ingress.

Yes, waterproofing systems require regular inspection and maintenance to ensure their effectiveness and longevity. Maintenance activities may include cleaning drainage channels, inspecting seals and joints, repairing any damage or deterioration, and servicing pumping systems.

While some waterproofing products may be suitable for DIY installation, such as surface-applied coatings, complex waterproofing systems such as Type B integral systems and Type C drained cavity systems, typically require professional installation by trained waterproofing contractors. Consulting with waterproofing specialists is recommended to ensure proper design, installation, and maintenance of waterproofing systems.

Inadequate structural waterproofing can lead to various issues, including water damage, dampness, mould growth, structural deterioration, and decreased indoor air quality. These problems can compromise the integrity and safety of the building, leading to costly repairs and potential health hazards for occupants. Therefore, it’s essential to implement effective waterproofing measures to protect buildings and below-ground structures from water ingress.

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