FAQs

Common Questions

Frequently Asked Questions About Waterproofing & Construction Services in Kenya.

Looking for expert answers about waterproofing in Kenya, roof waterproofing, roof leak repair, basement waterproofing, damp proofing, epoxy flooring, polycarbonate roofing sheets, or building repair services? Our comprehensive FAQ section covers the most common questions about waterproofing systems, waterproofing products, installation methods, maintenance, pricing, and construction solutions for residential, commercial, and industrial properties. Whether you’re planning a new project or repairing an existing building, Catcob Construction Solutions Ltd provides practical guidance to help you choose the most effective and long-lasting waterproofing solution for your property.

Concrete waterproofing solutions offer protection against water infiltration, corrosion, and deterioration, extending the lifespan of structures and enhancing durability. Solutions like concrete admixtures, both liquid and Cementous provide reliable waterproofing for residential and commercial properties, ensuring long-term structural integrity and minimizing maintenance requirements.
The best solution for addressing a leaking underground tank involves utilizing specialized waterproofing materials like Mapei Lamposilex water plug if cracks are present and Masterseal 501 as a waterproofing coat, both of which are designed explicitly for below-ground applications. These products create a barrier against water infiltration, effectively sealing leaks and ensuring long-term protection for the tank and surrounding environment.
Basement water leakage can result from various factors such as cracks in the foundation, poor drainage, hydrostatic pressure, and inadequate waterproofing. Effective solutions include using waterproofing admixtures during construction, pvc waterstops at the construction joints and expansion joints, using sealants to fill the Joints and waterproofing coatings to address these issues comprehensively, ensuring a dry and protected basement environment.
YES, it is very important so as to avoid water seapage caused by small cracks due to the exposed slab. A good floor slope and water drainage is vital to ensure a watertight roof. Effective waterproof includes installation of APP Bituminious Membranes, waterproof coatings either cementitious or acrylic and also using waterproofing admixtures during casting of the slab. This will also help in maintaining the structural strength of the building. Acrylic waterproofing is a flexible and durable solution that forms a protective barrier against water infiltration while offering advantages such as UV resistance, breathability, and ease of application. Common products include masterseal 599 and masterseal 550.
Our exterior waterproof coatings include acrylic waterproof coatings, nano technology-based waterproofing, epoxy coatings, and silicone-based sealants, providing durable protection against water intrusion, UV damage, and harsh weather conditions. These coatings ensure long-lasting performance and aesthetic appeal for exterior surfaces, protecting buildings from moisture-related issues and preserving their appearance.
Various concrete hardeners are available to suit different needs, offering enhanced surface hardness and durability. Liquid formulations, dry shake hardeners, and surface treatments like Sika QuartzTop 3 Hardner provide reliable solutions for improving the strength and longevity of concrete surfaces, ensuring they withstand the rigors of daily use.
Cracks in concrete structures can be effectively addressed using specialized crack fillers like Sikadur 31CF or epoxy injections. These solutions restore structural durability, prevent water infiltration, and ensure long-term stability, preserving the integrity and functionality of the affected structures. Floor cracks can also be avoided by using floor hardeners during construction.
When it comes to waterproof sealants for exterior applications, several high-quality options are available to meet different project needs. Polyurethane sealants offer excellent flexibility and durability, making them ideal for joints, seams, and cracks in outdoor environments. Silicone sealants provide effective weather resistance, ensuring long-lasting performance in harsh conditions. Acrylic sealants offer versatility and ease of application, suitable for a wide range of exterior sealing tasks. Depending on the specific requirements of your project, our experts can recommend the best waterproof sealant to achieve reliable and lasting results. Polysulphide sealants are used for sealing expansion joints that are anticipating high movements, especially, on road expansion joints. Products like Sikaflex 11fc Joint Sealant, Sika AnchorFix-1, thioflex 600, Dr fix it PU and masterseal 474 are popular choices for exterior waterproofing applications.
When dealing with leaking bathrooms, it's crucial to use effective waterproofing solutions tailored for wet areas. Waterproofing coatings like Sika Seal 105 or DR.FIX IT 113 are specifically formulated to withstand moisture and prevent leaks, providing a durable and reliable barrier that keeps bathrooms dry and free from water damage.
To address dampness on walls or chipping paint, a comprehensive waterproofing approach is necessary. You need to first identify the source of leakage that is causing the dampness, so that prompt treatment can be done. Then scrap off the loose chipped paint and apply a waterproofing coat, apply neil and paint over. Additionally, damp-proofing solutions customized to the specific needs of the structure can help mitigate moisture issues and preserve the integrity of the walls, ensuring a dry and protected interior environment.
Achieving durable surfaces in high-traffic areas like car parks, basements, garages, and warehouse floors requires the use of concrete hardeners. Products such as Sika QuartzTop 3 Hardner offer enhanced durability and resistance to wear and tear, ensuring long-lasting performance even in demanding environments. We recommend the use of power float with the hardener so that it can compact the hardener into the concrete surface, ensuring a uniform and robust finish. When dealing with a chipping floor, it's essential to restore and protect the surface to prevent further damage. Products such as Sika Monotop or Master Emaco can be mixed with water to make a slurry that is used to repair the chipped floor. However, you can prevent your floor from chipping by using QuartzTop 3 hardener.
Cabros can be hardened and dried rapidly using specialized concrete hardeners like Sika Rapid 2 Hardner or fast-curing sealants appropriate for the application. These products expedite the curing process, allowing for quicker completion of projects while ensuring optimal hardness and strength of the cabros. Sika Viscocrete can also be used to increase early strength development and easy removal of formwork.
Fixing bolts into concrete requires anchoring adhesives or systems designed to secure fasteners effectively. Products like Sika AnchorFix-1 provide strong and reliable anchorage, ensuring secure attachment of bolts in concrete substrates for various construction and industrial applications.

Concrete roofs require different waterproofing systems depending on their condition. APP bituminous membranes, liquid waterproofing membranes, and polyurethane coatings are among the most reliable solutions for long-term protection.

Permanent roof repair starts with identifying the source of the leak before applying the appropriate waterproofing system. Simply covering the leak without repairing the underlying problem often leads to recurring water damage.

Professional roof waterproofing can last between 10 and 25 years depending on the waterproofing material used, installation quality, weather conditions, and maintenance.

Water can penetrate concrete slabs through shrinkage cracks, construction joints, poor drainage, failed waterproof membranes, and structural movement.

Balconies require waterproofing systems that can withstand sunlight, rainfall, and foot traffic. Liquid membranes and APP membranes are commonly used depending on the surface.

The best time is during construction because it protects the structure from the beginning. Existing buildings can also be waterproofed successfully.

Signs include ceiling stains, damp walls, mould growth, roof leaks, peeling paint, musty smells, and visible water seepage.

Liquid waterproofing forms a seamless coating, while APP membranes provide a thicker, torch-applied waterproof barrier ideal for concrete roofs and terraces.

Terraces exposed to heavy rainfall usually perform best with APP membranes or polyurethane waterproofing systems.

Yes. Waterproofing helps prevent structural damage, reduces maintenance costs, and improves the long-term value of residential and commercial properties.

Poor surface preparation, inferior materials, improper installation, blocked drainage systems, and ageing membranes are common causes.

Yes. Waterproofing solutions are available for offices, shopping malls, factories, warehouses, schools, hospitals, and apartment buildings.

Swimming pools typically require cementitious waterproofing systems, flexible membranes, and specialized waterproof coatings designed for permanent water exposure.

Roof inspections are recommended at least once every year and after heavy rainfall to identify potential problems early.

Yes. Many ageing concrete roofs can be restored through repairs and professional waterproofing, avoiding complete roof replacement.

Yes. Quality UV-resistant polycarbonate sheets perform well under intense sunshine, heavy rain, and changing weather conditions.

Polycarbonate roofing provides natural lighting, impact resistance, UV protection, low maintenance, and modern aesthetics.

They are commonly installed on patios, canopies, skylights, carports, pergolas, balconies, walkways, warehouses, and commercial buildings.

Premium polycarbonate sheets can last over 15 years when professionally installed and properly maintained.

Professional waterproofing includes proper diagnosis, quality materials, technical installation, and long-term performance that DIY solutions often cannot achieve.

We provide roof waterproofing, basement waterproofing, APP membrane installation, epoxy flooring, concrete repairs, polycarbonate roofing, refurbishment, and waterproofing consultancy.

Catcob serves clients throughout Nairobi and across Kenya for residential, commercial, and industrial construction projects.

Yes. We assess buildings, identify moisture problems, recommend suitable waterproofing systems, and provide technical guidance before installation.

Simply contact Catcob Construction Solutions through our website, phone, or email to arrange a site assessment and receive a detailed quotation.

The best system depends on the building area. Roofs, basements, terraces, foundations, and water tanks often require different waterproofing technologies.

Yes. Waterproofing eliminates water penetration, reducing excess moisture that encourages mould and mildew.

The surface should be cleaned, repaired, and prepared according to the selected waterproofing system to ensure maximum adhesion and performance.

Modern waterproofing systems are designed to be durable and many products have low VOC formulations that support sustainable construction.

Catcob combines quality products, skilled workmanship, technical expertise, and tailored waterproofing solutions to deliver durable, long-lasting results.

Regular inspections, clearing drainage systems, repairing minor damage promptly, and scheduling professional maintenance help extend the lifespan of waterproofing systems.

Kenya's Trusted Waterproofing & Construction Experts.

Professional Waterproofing Solutions for Homes, Businesses & Industrial Projects.

A leaking concrete roof requires more than simply applying a waterproof coating over the affected area. The first step is identifying the source of water penetration, which may include structural cracks, failed waterproof membranes, blocked drainage outlets, expansion joints, or deteriorated concrete surfaces. Once the cause has been established, the appropriate waterproofing system can be selected.

For most concrete roofs in Kenya, APP bituminous membranes, polyurethane waterproofing, and liquid waterproofing membranes provide long-lasting protection against heavy rainfall, UV exposure, and ponding water. Professional installation is essential to ensure the waterproofing system bonds correctly and delivers years of reliable performance.

Choosing the right waterproofing contractor is one of the most important decisions for protecting your property. Look for a contractor with proven experience, trained technicians, high-quality waterproofing products, completed projects, and the ability to recommend solutions based on your building's specific needs rather than offering the same product for every project.

A reputable contractor should carry out a detailed site inspection before recommending a waterproofing system, explain the installation process, provide a written quotation, and advise on maintenance requirements. This approach helps ensure the waterproofing solution delivers long-term value and reduces the likelihood of recurring leaks.

Commercial buildings require waterproofing systems that can withstand heavy use, large roof areas, and varying weather conditions. The ideal solution depends on the part of the building being protected. Flat roofs often benefit from APP bituminous membranes, while basements may require cementitious or crystalline waterproofing. Wet areas, balconies, terraces, and podium decks can benefit from liquid-applied membranes or polyurethane systems.

Selecting high-quality waterproofing materials and ensuring proper installation are essential for protecting commercial properties from water damage, structural deterioration, and expensive maintenance.

If a roof continues leaking after waterproofing, the underlying cause may not have been fully addressed. Common reasons include poor surface preparation, incorrect product selection, incomplete sealing around joints and penetrations, blocked drainage systems, or waterproofing applied over damp or contaminated surfaces.

A professional inspection can identify whether repairs, additional surface preparation, or a different waterproofing system is required. Addressing the root cause rather than only treating the visible leak provides a more durable solution.

Many signs indicate that a building may require waterproofing. These include water stains on ceilings, peeling paint, damp walls, mould growth, cracked concrete surfaces, musty odours, water seepage through walls or floors, and persistent roof leaks after rainfall.

Ignoring these warning signs can lead to more extensive structural damage, higher repair costs, and deterioration of interior finishes. Early inspection and timely waterproofing help preserve the integrity and value of the property.

Roof repair and roof waterproofing serve different but complementary purposes. Roof repair focuses on correcting physical defects such as cracks, damaged concrete, loose flashing, or deteriorated joints. Waterproofing is then applied to create a continuous protective barrier that prevents future water penetration.

In many cases, repairing defects before waterproofing produces the best long-term results, as the waterproofing system is applied to a stable and properly prepared surface.

Waterproofing can be carried out during the rainy season, although weather conditions influence the installation process. Certain waterproofing systems require completely dry surfaces, while others can tolerate limited moisture during preparation.

Professional contractors monitor weather forecasts, protect work areas, and schedule installation to ensure the waterproofing materials cure correctly and achieve optimal performance.

Although quality waterproofing systems are designed for long-term performance, periodic inspections help identify minor issues before they become major repairs. Residential buildings should generally be inspected every two to three years, while commercial and industrial facilities may benefit from annual inspections because of higher exposure and usage.

Regular maintenance includes checking roof outlets, expansion joints, membrane condition, sealants, and any areas previously repaired.

The durability of polycarbonate roofing depends not only on the quality of the sheets but also on correct installation. Professional installation ensures appropriate sheet spacing for thermal expansion, proper fastening techniques, suitable sealing, correct support spacing, and effective drainage.

Incorrect installation can lead to leaks, cracked sheets, excessive movement, reduced lifespan, and poor overall performance. Using experienced installers helps maximize the lifespan and appearance of the roofing system.

Professional waterproofing helps protect one of your most valuable assets by preventing water damage before it occurs. Investing in quality waterproofing reduces future repair costs, minimizes structural deterioration, protects interior finishes, improves occupant comfort, and extends the lifespan of the building.

Compared with the cost of repairing extensive water damage, structural deterioration, or replacing damaged finishes, preventative waterproofing provides long-term financial savings while preserving the property's value.