Expert Terrace Waterproofing in Varna
Permanent solutions for leaking terraces and flat roofs.
About this service
Permanent solutions for leaking terraces and flat roofs. Using advanced liquid-applied membranes from Sika® and Mapei®, we stop water ingress, prevent structural damage, and deliver a fully usable, protected space. Projects from 20 m² to over 2,000 m² are typically completed in 5-15 days. Full system application starts from €28/m² with a written 15-year warranty.
За обекти във Варна планираме огледите според достъпа в квартали като Аспарухово, Чайка, Левски, Владиславово и околните населени места. Морският климат, соленият въздух и по-силният вятър се отчитат при избора на материали, закрепване и гаранционни детайли.
What we deliver and which problem we solve
What we deliver
Infra Remonti EOOD provides specialized terrace waterproofing services for residential, commercial, and industrial clients. Our scope covers everything from small private balconies to large-scale rooftop terraces on hotels and office buildings. We work with property owners, building managers, and developers who require a long-term, reliable solution to water infiltration. Our teams are certified by leading manufacturers like Sika, Mapei, and BMI Group for the application of high-performance liquid and sheet waterproofing systems. We operate with dedicated crews equipped with specialized machinery, including high-pressure water jetters (up to 500 bar) for surface cleaning, planetary diamond grinders for concrete preparation, and airless spray systems for monolithic membrane application. This ensures factory-grade quality and consistency. While our primary operational center is in Varna, we have fully equipped mobile teams that cover Burgas, Plovdiv, and Sofia, adapting our material selection and application methods to local climate conditions – from the saline, high-UV environment of the Black Sea coast to the significant freeze-thaw cycles experienced in Sofia.
Which problem we solve
A leaking terrace is not a cosmetic issue; it's a progressive failure that threatens the building's structural integrity and occupant health. Unaddressed water penetration through failed grout, cracked tiles, or degraded old membranes saturates the concrete slab. This leads to the corrosion of steel reinforcement (rebar), causing it to expand and break the concrete apart (spalling). Water then travels through the structure, appearing as damp patches, paint peeling, and active drips on ceilings below, often damaging expensive interior finishes. Persistent moisture creates an environment for toxic black mold (Stachybotrys chartarum) to grow within ceilings and walls, posing a serious health risk. Furthermore, freeze-thaw cycles in winter can turn trapped water into ice, which expands and causes deep cracks and delamination of the entire terrace structure. Our professional waterproofing systems solve these problems by creating a seamless, elastic, and fully bonded barrier that completely blocks water at the surface. By choosing the correct system, we prevent rebar corrosion, eliminate interior leaks, stop mold growth, and protect your property investment for decades, all backed by a comprehensive 15-year warranty.
Seeing water stains on your ceiling below the terrace?
This is a critical sign of waterproofing failure. Call +359 88 654 0238 for an immediate, free inspection and leak diagnosis.
What's Included in Our Terrace Waterproofing Service?
Our all-inclusive service covers every technical step required for a warranted, long-lasting waterproofing system.
Detailed Substrate Analysis and Moisture Testing
We perform a thorough assessment of the existing concrete or screed, including hammer sounding for delamination and electronic moisture meter readings (e.g., Tramex CMEX5). This data determines the exact surface preparation required and the type of primer (e.g., moisture-blocking epoxy) needed to guarantee system adhesion, preventing future failures.
High-Pressure Water Jetting & Mechanical Grinding
The entire surface is cleaned with water jets at 300-500 bar to remove all loose materials, dirt, and organic growth. Following this, we use planetary grinders with diamond segments to achieve a Concrete Surface Profile (CSP) 3-4, creating the ideal mechanical key for the primer and membrane to bond permanently to the substrate.
Structural Crack and Joint Repair
All static cracks are chased out with a diamond blade, cleaned, and filled with a high-strength epoxy repair mortar (e.g., Sikadur-31 CF). Dynamic joints are cleaned, primed, and sealed with a highly elastic polyurethane sealant (e.g., Sikaflex PRO-3) to accommodate movement without compromising the waterproofing.
Application of System-Specific Primer
We apply a suitable primer based on substrate condition. For porous concrete, a penetrating epoxy primer like Sikaflloor-156 is used to seal the surface and enhance adhesion. For damp substrates, a moisture-tolerant epoxy primer is applied to prevent blistering of the main membrane. This step is critical for long-term bonding.
Detailed Work around Drains, Vents, and Upstands
All penetrations are meticulously detailed. We apply extra reinforcement and sealant around drains, pipes, and wall junctions (upstands). This involves creating fillets at 90-degree angles with repair mortar and embedding reinforcement fleece into the liquid membrane, creating a robust, multi-layered seal at the most vulnerable points.
Application of a Reinforced Liquid Membrane
We apply the first layer of a high-performance liquid polyurethane membrane (e.g., SikaLastic-612) to the specified thickness (typically 1.2-1.5 mm). A reinforcing geotextile fleece (e.g., Sika Reemat Premium) is immediately embedded into the wet layer, ensuring uniform thickness and significantly enhancing the system's tensile strength and puncture resistance.
Application of Seamless Saturation Coat
Once the first layer has cured, a second saturation coat of the same liquid membrane is applied, fully encapsulating the reinforcement fleece. This creates a monolithic, seamless membrane with a total dry film thickness (DFT) of at least 2.0 mm, conforming to ETAG 005 standards for a 15-25 year service life.
UV-Resistant and Aliphatic Top Coat
For terraces exposed to sun, we apply a final, UV-stable aliphatic polyurethane top coat (e.g., Sikaflloor-416). This layer protects the main waterproofing membrane from solar degradation, chalking, and discoloration, especially important in the high-UV coastal climates of Varna and Burgas. It also provides a durable, walkable, and easy-to-clean finish.
Controlled Flood Testing (48 Hours)
Before project sign-off, we conduct a mandatory 48-hour flood test. We block all drains and fill the entire terrace with water to a depth of 5-10 cm. This allows us to verify the integrity of the entire system and confirm that there are absolutely no leaks before we hand the project over to you.
Issuance of Written 15-Year Warranty
Upon successful completion and passing the flood test, we provide a formal written warranty certificate. This document covers both materials and labor for a period of 15 years against any leaks, cracking, or delamination of the waterproofing system, providing you with complete peace of mind.
Our 8-Step Terrace Waterproofing Process
A systematic approach ensuring quality control and a perfect result every time.
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Step 1: Initial Site Inspection and Quotation
Our technical specialist visits your site to assess the terrace's condition, take precise measurements, identify problem areas (ponding, cracks), and discuss your requirements. We use this data to prepare a detailed, itemized quotation outlining the recommended system, scope of work, timeline, and all costs, with no hidden fees.
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Step 2: Surface Deconstruction and Preparation
Work begins with the removal of any failed existing finishes like old tiles, loose screed, or degraded bituminous felt. The exposed substrate is then mechanically prepared using grinders and high-pressure water jets to create a clean, solid, and profiled surface ready to receive the new system. All debris is removed from the site.
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Step 3: Substrate Repairs and Detailing
Our team meticulously repairs any defects in the concrete slab. Cracks are filled, spalled areas are patched with polymer-modified mortar, and fillets are created at all wall-to-floor junctions. This ensures a smooth, stable, and continuous substrate, which is essential for a flawless membrane application and preventing stress points.
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Step 4: Primer Application
A substrate-specific primer is roller or spray-applied. This crucial layer seals the concrete to prevent outgassing (bubbling), blocks residual moisture, and creates a powerful chemical bond between the substrate and the waterproofing membrane. We wait for the primer to become tack-free according to the manufacturer's technical data sheet.
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Step 5: Main Waterproofing Layer with Reinforcement
The first coat of the liquid membrane is applied. A non-woven polyester fleece reinforcement is immediately laid into the wet membrane and saturated using a roller. This reinforcement provides exceptional tear and puncture resistance and ensures a consistent membrane thickness across the entire area, especially over cracks and joints.
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Step 6: Saturation/Second Membrane Layer
After the initial layer cures (typically 12-24 hours), a second coat of the liquid membrane is applied to fully saturate the reinforcement fleece and build the required total dry film thickness. This creates a single, joint-free, and highly elastic waterproofing barrier that is 100% bonded to the substrate.
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Step 7: UV Protective Top Coat and Final Finishes
A final, colored, UV-stable top coat is applied. This not only protects the system from sun damage but also provides the final aesthetic finish. If required, an anti-slip aggregate can be broadcast into the top coat for enhanced safety. We then reinstall any drain covers and ensure all detailing is perfect.
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Step 8: Flood Test and Project Handover
We perform a 48-hour flood test to guarantee a completely leak-proof installation. Following a successful test, we conduct a final site clean-up and a joint walk-through with you. We then issue the formal 15-year written warranty and maintenance guide, officially handing over your newly protected terrace.
Ready to choose the right waterproofing system for your terrace?
Our experts can explain the pros and cons of polyurethane, PMMA, and bitumen systems for your specific needs.
Why Choose Infra Remonti for Your Terrace?
We deliver technical excellence, not just a cosmetic fix.
- A true 15-year written warranty covering both materials and labor, backed by our parent company, Infra Remonti EOOD.
- Certified applicators for Sika®, Mapei®, and Köster® systems, ensuring adherence to strict manufacturer specifications for guaranteed performance.
- We use liquid polyurethane/polyurea membranes with >400% elongation, capable of bridging new cracks that may form in the structure.
- Mandatory 48-hour flood test on every completed project to provide 100% certainty that your terrace is completely sealed before we leave.
- Specialized material selection for Varna's coastal climate, using aliphatic top coats with high resistance to salt spray and UV radiation.
- Meticulous detailing around drains and upstands using embedded reinforcement fleece, eliminating the most common points of failure.
- We achieve a minimum dry film thickness (DFT) of 2.0 mm, which complies with ETAG 005 W3 classification for a 25-year service life.
- Transparent pricing with a 30/40/30 payment structure. You pay the final 30% only after a successful flood test and your full approval.
- Our teams use industrial-grade dust extraction vacuums connected to grinders to minimize airborne dust and disruption to your property.
- We don't just waterproof over old problems. We remove failed layers down to a sound substrate for a reliable, long-term solution.
- Experience across all four major Bulgarian climates: the humid coast (Varna, Burgas), the hot plains (Plovdiv), and the cold winters (Sofia).
- Direct communication with the project manager from start to finish, ensuring your questions are answered and you are always informed.
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Don't let another rainy season damage your property.
Secure your investment now. Call us at +359 88 654 0238 for a detailed proposal.
Materials We Use for Terrace Waterproofing
We select from a range of high-performance, certified materials to build the perfect system for your specific needs and budget.
Liquid Polyurethane Membrane (PU)
Example: SikaLastic®-612. This is a one-component, cold-applied, moisture-triggered polyurethane membrane. It cures to form a seamless, durable, and weather-resistant waterproofing solution. Its key advantage is high elasticity (>500% elongation), allowing it to handle structural movement and bridge cracks. It's ideal for complex roofs with many details. Total system thickness is typically 2.0mm. It requires a UV-protective top coat for long-term sun exposure.
Cementitious Waterproofing Slurry
Example: Ceresit CR 166. This is a two-component, flexible, fiber-reinforced slurry ideal for waterproofing balconies and terraces beneath tiles. It forms a strong bond with the concrete substrate and can bridge hairline cracks. While not a standalone wearing surface, it's a cost-effective solution when a new tiled finish is planned. It has excellent water impermeability (resists 5 bar pressure) and is frost-resistant.
Epoxy Primer for Concrete
Example: Mapei Primer SN. This is a two-component, solvent-free epoxy primer used to prepare concrete surfaces for polyurethane or polyurea systems. It consolidates dusty or weak substrates, seals porosity to prevent bubbling in the membrane, and provides an exceptional chemical bond. For damp substrates, we use specialized moisture-tolerant versions like Sikaflloor EpoCem.
Polyurethane Sealant for Joints
Example: Sikaflex® PRO-3. This is a high-performance, one-component polyurethane sealant for sealing movement and connection joints in floors and civil engineering structures. It has a movement capability of ±25% (ISO 9047) and excellent mechanical and chemical resistance. We use it to seal perimeter and expansion joints before applying the main membrane, ensuring the entire system remains flexible.
Polyester Reinforcement Fleece
Example: Sika® Reemat Premium or Mapei Mapetex Sel. This is a non-woven, rot-proof polyester fleece used to reinforce liquid-applied membranes. It is embedded into the first wet coat of the membrane to ensure consistent thickness, improve tensile strength, and enhance puncture and tear resistance. It is critical for long-term durability, especially over joints, cracks, and areas of high stress.
Aliphatic Polyurethane Top Coat
Example: Mapei Mapeflloor PU 150. This is a two-component, aliphatic, UV-resistant polyurethane finish. 'Aliphatic' means it is color-stable and will not yellow or degrade under prolonged exposure to sunlight. It's applied as the final layer in a terrace system to provide UV protection, chemical resistance, and a durable, walkable, and aesthetically pleasing finish in a range of colors.
Where We Apply Waterproofing Systems
Our solutions are suitable for a wide range of new and existing structures.
Frequently asked questions
Related services in Facades & insulation
Secure Your Property with a Leak-Free Terrace
Stop temporary patches and invest in a permanent solution. Infra Remonti EOOD delivers technically superior terrace waterproofing systems with a 15-year written guarantee. Protect your interior, preserve your building's structure, and gain a beautiful, usable outdoor space. Contact our technical team today at +359 88 654 0238 for a comprehensive, no-obligation site inspection and a detailed quote tailored to your property in Varna, Burgas, Plovdiv, or Sofia.
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Stop temporary patches and invest in a permanent solution. Infra Remonti EOOD delivers technically superior terrace waterproofing systems with a 15-year written guarantee. Protect your interior, preserve your building's structure, and gain a beautiful, usable outdoor space. Contact our technical team today at +359 88 654 0238 for a comprehensive, no-obligation site inspection and a detailed quote tailored to your property in Varna, Burgas, Plovdiv, or Sofia.
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