Foundation Waterproofing Solutions in Varna & East Bulgaria in Ruse
Protect your investment with professional foundation waterproofing.
About this service
Protect your investment with professional foundation waterproofing. We create impenetrable barriers against groundwater and soil moisture for structures from 50 m² to over 5,000 m². Using advanced polymer-bitumen membranes and crystallizing slurries, our systems start from €18/m² (excl. VAT). A typical 150 m² residential foundation is fully waterproofed within 5-7 working days. We provide a written 15-year warranty on all systems.
За обекти в Русе вземаме предвид температурните амплитуди, дунавската влажност и спецификата на квартали като Възраждане, Здравец, Чародейка, Дружба. Огледът уточнява достъп, складиране на материали и технология, подходяща за конкретната сграда.
What we deliver and which problem we solve
What we deliver
Infra Remonti EOOD specialises in the design and application of high-performance foundation waterproofing systems for both new construction and existing buildings. Our scope covers positive-side (exterior) and negative-side (interior) solutions for a wide range of structures, including private houses, residential apartment blocks, commercial centres, industrial facilities, and specialised underground structures like parking garages and water tanks. While we operate nationwide, we have dedicated teams and deep expertise in the coastal regions of Varna and Burgas, where high groundwater tables, soil salinity, and aggressive atmospheric conditions demand superior protection. We also serve the major urban centers of Plovdiv and Sofia, adapting our systems to local ground conditions and logistical complexities. Our crews are equipped with specialised machinery essential for correct application: high-pressure water jetting systems (up to 300 bar), industrial concrete grinders for surface profiling, and precision application tools like automated gas torches for APP/SBS membranes and airless sprayers for liquid-applied systems. We manage the entire project lifecycle, from initial moisture analysis and system design to the final quality control inspection and issuance of our 15-year warranty, providing clients with a single, accountable partner for this critical construction stage.
Which problem we solve
The fundamental problem we solve is water and moisture ingress into a building's substructure, a failure that triggers a cascade of severe and expensive consequences if not addressed correctly from the outset. Uncontrolled water penetration carries dissolved salts and chemicals from the soil directly into the concrete matrix, initiating corrosion of the steel reinforcement (rebar). This corrosion process expands the steel, causing the concrete to crack, spall, and lose its designed compressive strength, ultimately compromising the foundation's structural integrity and shortening the building's lifespan. Secondly, we eliminate the conditions for dampness within basements and ground-floor levels. Persistent moisture leads to the proliferation of hazardous mold species like Stachybotrys chartarum (black mold), which release mycotoxins linked to respiratory illnesses and allergies, rendering spaces unhealthy and uninhabitable. This dampness ruins interior finishes, damages stored property, and creates a pervasive musty odour that significantly devalues the entire property. The cost of rectifying a failed waterproofing system is exponentially higher than getting it right during construction; remedial work can be 5 to 10 times more expensive, involving disruptive excavation and complex chemical injection grouting. Our professional waterproofing service proactively mitigates these risks, blocking water under hydrostatic pressure, preventing capillary moisture rise, and even providing a barrier against soil gases like radon, thereby securing the long-term structural health, interior air quality, and financial value of your asset.
Is your foundation vulnerable to water damage?
Secure your building's future today. Call Infra Remonti EOOD at +359 88 654 0238 for a detailed technical assessment.
Our Waterproofing System: A Comprehensive Breakdown
A quality waterproofing job is more than just a membrane. It's a multi-stage system where every step is critical for long-term performance.
Substrate Condition Analysis & Report
Our process begins with a rigorous inspection of the foundation's concrete surfaces. We identify and map all defects such as honeycombing, voids, cracks, and surface laitance. Using electronic moisture meters and, if required, core sampling, we determine the concrete's porosity and Ph level to ensure it is chemically and physically ready to receive the waterproofing system. This data informs the entire surface preparation strategy and is documented for your records.
Mechanical Surface Preparation
All foundation surfaces designated for waterproofing are mechanically prepared to achieve a clean, sound substrate with an open-pored texture. We use high-pressure water jetting at a minimum of 250 bar to remove all dirt, oils, and curing compounds. This is followed by mechanical grinding to eliminate sharp edges, protrusions, and formwork fins that could puncture the waterproofing membrane. The result is a perfect bonding surface.
Sealing of Cracks & Construction Joints
Static cracks wider than 0.5mm and all planned construction joints are meticulously treated. We chase the crack or joint to a depth of at least 20mm, clean it, and then fill it with a permanently flexible, high-adhesion polyurethane sealant like Mapei Mapeflex PU45 FT or a swelling waterstop profile like SikaSwell S-2. This critical step ensures these high-movement areas remain watertight and prevents localised system failures.
Application of Adhesion-Promoting Primer
We apply a substrate-specific primer, typically a low-viscosity bitumen or two-component epoxy-based formula like Sika Igolflex-P01. This primer penetrates the concrete pores to consolidate the surface, seal residual dust, and create a powerful chemical bond between the concrete and the primary waterproofing membrane. This step is essential to prevent delamination and ensure monolithic adhesion of the entire system.
Installation of Primary Waterproofing Membrane
The core of the system is the application of the primary barrier. This is typically a 4mm thick, torch-applied SBS polymer-bitumen sheet membrane or a 2mm thick spray-applied liquid membrane such as polyurea. Our certified technicians ensure all overlaps on sheet membranes are a minimum of 100mm and are fully torch-welded to create a continuous, homogenous, and completely impermeable layer across the entire foundation surface.
Reinforced Detailing of Penetrations & Corners
All penetrations (pipes, ducts) and geometric transitions (wall-to-slab joints, internal and external corners) are weak points that receive special reinforcement. We use custom-cut flashing, additional layers of membrane, and often embed a polyester reinforcement fabric into a liquid waterproofing compound like Mapei Mapelastic to build up these critical areas, ensuring they are the strongest parts of the system.
Installation of Protection & Drainage Composite Board
Once the membrane is installed and has passed inspection, we apply a rigid protection course. This is a high-density polyethylene (HDPE) dimpled sheet, often with a geotextile filter fabric bonded to it. This layer serves two crucial functions: it provides robust physical protection against damage during backfilling and creates a drainage cavity that relieves hydrostatic pressure on the membrane, channeling water away to the perimeter drain.
Flood Testing for Horizontal Surfaces
For all horizontal applications, such as foundation slabs or podium decks, we perform a mandatory 48-hour flood test as a definitive quality control measure. The area is dammed and filled with water to a minimum depth of 50mm. This test unequivocally proves the integrity of the waterproofing system before it is covered, providing absolute assurance that the area is 100% leak-free.
Supervised & Controlled Backfilling
The final stage of our on-site work is overseeing the backfilling against the newly waterproofed and protected walls. Our site foreman ensures that the backfill material is approved (free of sharp rocks or construction debris) and that it is placed and compacted in controlled lifts (typically 300mm). This prevents point loads and settlement that could damage the completed system.
Issuance of 15-Year Written Warranty
Upon final inspection and project completion, we provide a comprehensive handover package. This includes all project documentation, photographic records, and most importantly, our formal, legally binding 15-year written warranty. This document details the system installed and guarantees its performance against defects in both materials and our workmanship, providing you with long-term, documented peace of mind.
Our Foundation Waterproofing Process
A systematic, engineering-led approach from initial design to final handover ensures a flawless result.
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Step 1: On-Site Consultation & Requirement Analysis
Our process starts with a technical specialist visiting your construction site. We analyze the architectural plans, geotechnical survey, and prevailing site conditions. We discuss the building's intended use and exposure to groundwater to understand the specific risks. This initial assessment allows us to recommend the most appropriate and cost-effective waterproofing strategy, whether it's a membrane, crystallizing, or a more complex combined system.
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Step 2: System Design & Detailed Proposal
Based on the analysis, our technical department designs a bespoke waterproofing system. We select specific, compatible products, for example, SikaProof A+ 12 for a new pre-applied slab system or a Mapei Plastimul-based system for vertical walls. You receive a detailed technical proposal outlining the methodology, a bill of materials, project timeline, and a transparent quotation with a clear price per square meter.
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Step 3: Substrate Preparation & Profiling
Our trained crew arrives on site and begins the critical task of surface preparation. Using heavy-duty concrete grinders and high-pressure washers, we remove all contaminants and laitance to achieve a specified Concrete Surface Profile (CSP) of 3-4. This clean, textured surface is essential for achieving the maximum bond strength required by the membrane manufacturer, preventing future adhesion failures.
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Step 4: Priming & Detail Fortification
A bitumen or epoxy-based primer is meticulously applied to the prepared substrate using rollers or airless sprayers. While the primer cures, our technicians focus on the details. All construction joints, corners, and service pipe entries are pre-treated using polyurethane sealants and reinforced with additional waterproofing strips. This step fortifies the areas most prone to failure from movement or stress.
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Step 5: Application of the Main Waterproofing Barrier
For sheet membranes, our teams expertly unroll and position the material, then use propane torches to heat-weld the seams, ensuring precise 100mm side laps and 150mm end laps for a monolithic seal. For liquid-applied systems, we spray-apply the material in multiple coats to achieve the required Dry Film Thickness (DFT), typically 2mm, constantly checking the depth with a wet film gauge to guarantee complete and uniform coverage.
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Step 6: In-Process Quality Control & Inspection
Throughout the application, our on-site foreman performs continuous quality control checks. For welded membranes, every seam is physically probed to ensure a complete weld. For liquid systems, adhesion tests are performed. We document each stage with high-resolution photographs, creating a visual record of the quality of work before it is concealed, which becomes part of the final handover file.
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Step 7: Installation of Protection & Drainage System
After the waterproofing membrane has been fully applied and has passed all quality checks (including flood testing where applicable), we install the protective layer. This is typically a high-compressive-strength HDPE dimpled drainage board. It is securely fastened to the wall, creating a permanent shield against backfill damage and an air gap that facilitates drainage, reducing hydrostatic load on the structure.
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Step 8: Final Walkthrough & Project Handover
Upon completion of all works, including supervised backfilling, we conduct a final project walkthrough with you or your designated representative. We formally hand over the complete project file, which includes material technical datasheets, our quality control records, and the signed 15-year written warranty certificate. The final 30% payment is only due after this successful handover.
Don't Gamble with Your Foundation's Integrity.
Get a guaranteed, long-term waterproofing solution from the specialists at Infra Remonti EOOD.
Why Choose Infra Remonti EOOD for Foundation Waterproofing?
Our focus is on technical excellence and long-term performance, not just a quick application.
- We provide a legally binding, 15-year written warranty covering both materials and labor, offering unparalleled asset protection and peace of mind.
- Our quotations are fully transparent, with prices from €18/m² and a detailed breakdown of all costs. No hidden fees or surprises.
- We specialize in coastal systems for Varna and Burgas, employing materials specifically designed to resist high salinity and sulphate attack from groundwater.
- Our application teams are officially trained and certified by leading manufacturers like Sika, Mapei, and BMI Group, ensuring every installation meets their strict specifications.
- We conduct a mandatory 48-hour flood test on all horizontal surfaces, providing you with absolute, documented proof of a leak-free system before covering.
- We always install a high-density (min. 500 g/m²) dimpled drainage board, a critical step that protects the membrane and relieves hydrostatic pressure.
- Our fair 30/40/30 payment structure ensures your payments are tied directly to our progress, aligning our interests with yours throughout the project.
- You receive a complete photographic record of the entire process, including close-ups of critical details like seams, corners, and pipe penetrations for your archives.
- We are experts in both positive-side (exterior) and negative-side (interior) applications, enabling us to provide the correct solution for any building, new or old.
- Our free site inspection includes a professional moisture assessment and a detailed technical recommendation, not just a sales pitch.
- Our financial stability is assured in writing, being part of the larger, reputable Infra Remonti EOOD construction group.
- We meticulously supervise the backfilling process to prevent damage to the new waterproofing system, a final step crucial for long-term success.
Калкулатор за Груб Строеж
Получете ориентировъчна цена за груб строеж по РЗП — за 60 секунди.
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Water leaks appear when you least expect them. Structural damage follows.
Act preventatively. Contact Infra Remonti EOOD for a free site inspection at +359 88 654 0238.
Materials We Trust for Lasting Protection
We use only premium, certified materials from world-leading manufacturers to guarantee the performance and longevity of your waterproofing system.
SBS Polymer-Bitumen Membrane (e.g., BMI Icopal Siplast Fundament)
This is a high-performance, 4mm thick torch-applied waterproofing membrane. The Styrene-Butadiene-Styrene (SBS) polymer modification gives it exceptional flexibility at low temperatures (down to -25°C), preventing cracks during winter. Reinforced with a strong, non-woven polyester fabric, it has high resistance to puncture and tearing. It is our go-to choice for reliable, durable waterproofing of residential and commercial foundations in Bulgaria's varied climate.
Crystallizing Waterproofing Slurry (e.g., SikaTop Seal-107)
A two-component, polymer-modified cementitious slurry. Unlike a surface coating, its proprietary active chemicals penetrate the concrete's capillary network. In the presence of water, they form non-soluble crystalline structures within the concrete itself, permanently sealing it against water penetration. It's ideal for negative-side applications (e.g., existing basements) and for adding a secondary layer of protection on new builds. It is certified for contact with potable water.
Fully Bonded PVC Waterproofing Sheet (e.g., SikaProof A+ 12)
A state-of-the-art, pre-applied sheet membrane system. This 1.2mm composite sheet consists of a PVC membrane laminated to a sealant and a non-woven fleece. It is laid before the rebar and concrete are placed. The poured concrete bonds with the fleece and sealant to create a continuous, inseparable mechanical and chemical bond, preventing any lateral water migration between the membrane and the structure. This is the ultimate solution for high-risk underground structures.
Bentonite Geotextile Membrane (e.g., Mapei MAPEPROOF)
A self-sealing waterproofing composite. It consists of a uniform layer of natural sodium bentonite clay encapsulated between two robust geotextiles. When hydrated by groundwater, the bentonite swells to form a dense, monolithic, and impermeable waterproofing gel. This system has the unique ability to self-heal minor punctures and seal small cracks that may form in the concrete over time. It's an excellent choice for non-hydrostatic conditions.
Polyurethane Liquid-Applied Membrane (e.g., Henkel Ceresit CP 30)
A single-component, liquid polyurethane that cures to form a seamless, highly elastic, and durable waterproofing membrane. Its superb crack-bridging capability (over 2mm) makes it ideal for areas prone to movement. It can be applied by roller or spray, conforming perfectly to complex shapes and details. With excellent adhesion to concrete, it's a versatile solution for podium decks, balconies, and foundation wall repairs.
HDPE Protection & Drainage Board (e.g., Tegola TEFOND PLUS)
A crucial component for system longevity. This is a high-density polyethylene (HDPE) dimpled sheet with a compressive strength exceeding 250 kN/m². It's installed over the primary waterproofing membrane to protect it from mechanical damage during backfilling and long-term soil settlement. The dimples create an air gap that acts as a drainage cavity, which relieves hydrostatic pressure and directs water down to the perimeter drain system.
Applications of Our Waterproofing Systems
We protect the substructure of any building type that requires long-term isolation from ground moisture.
Frequently asked questions
Related services in Rough construction
Ready to Secure Your Foundation for Decades?
Don't leave the most critical component of your building's structure to chance. A solid, dry, and durable foundation begins with a professional waterproofing system. Infra Remonti EOOD provides expert, engineered solutions using industry-leading materials backed by a written 15-year guarantee. Protect your valuable property from the risks of water damage, toxic mold, and long-term structural decay. Call us today at +359 88 654 0238 to schedule your free, no-obligation site inspection and receive a detailed technical proposal for your project in Varna, Burgas, or anywhere in Bulgaria.
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088 654 0238Ready to get started?
Don't leave the most critical component of your building's structure to chance. A solid, dry, and durable foundation begins with a professional waterproofing system. Infra Remonti EOOD provides expert, engineered solutions using industry-leading materials backed by a written 15-year guarantee. Protect your valuable property from the risks of water damage, toxic mold, and long-term structural decay. Call us today at +359 88 654 0238 to schedule your free, no-obligation site inspection and receive a detailed technical proposal for your project in Varna, Burgas, or anywhere in Bulgaria.
☎ 088 654 0238