Flat Roof Repair in Pasadena, CA

When it comes to comprehensive flat roof repair, Pasadena Prime Roofing delivers exceptionally reliable and professionally executed services that swiftly and efficiently address the most common and complex roofing challenges before they can compromise your property's safety or structural integrity. We fully understand that maintaining a structurally sound, completely leak-free roof is absolutely critical for protecting your valuable home or business investment, preserving your interior assets, and ensuring the safety and comfort of everyone inside your building.

Our highly skilled team is dedicated to implementing long-lasting, durable repair solutions while exclusively utilizing premium-quality materials and advanced repair techniques that significantly extend your flat roof's operational lifespan and provide comprehensive protection for your property against water damage, energy loss, and structural deterioration. We work in close partnership with you throughout the entire repair process, conducting thorough assessments and providing detailed consultations to identify the most effective, cost-efficient solutions that are specifically tailored to address your roof's unique challenges, performance requirements, and long-term maintenance goals.

By choosing Pasadena Prime Roofing for your flat roof repair needs, you gain access to a team of experienced, certified technicians who possess comprehensive expertise in all aspects of flat roofing systems, from membrane repair and drainage optimization to structural reinforcement and weatherproofing enhancement. We expertly handle the complete spectrum of repair challenges, from addressing minor leaks, punctures, and surface wear to managing major damage involving membrane replacement, structural repairs, and complete system restoration, ensuring your flat roof maintains optimal performance, weather resistance, and protective capabilities for years to come.

Types of Flat Roof Damage We Handle

Flat roofs face specific issues that need prompt, professional care to avoid bigger problems. We focus on fixing common damages that affect the roof’s structure and water protection.

Water Leaks and Ponding

Water leaks happen when the roof surface or seams get damaged, allowing water to enter the building. This can cause stains, mold, and damage to ceilings and walls inside. We carefully inspect the roof to find even small leaks.

Ponding means water collects and stays on the roof because it doesn’t drain properly. Over time, this adds weight and deteriorates the roofing materials. We fix drainage problems and repair surfaces to prevent water from pooling.

Membrane Cracks and Blisters



Flat roofs often have a membrane layer to keep water out. Over time, this membrane can crack due to weather changes or wear. Cracks let water seep in, which can cause damage below the surface.

Blisters appear when moisture or air gets trapped under the membrane. These bulges weaken the material and can burst, leading to leaks. We spot and repair cracks and blisters before they cause serious damage.

Flashing Deterioration

Flashing is the material used to seal joints where the roof meets structures like walls or chimneys. If flashing breaks down or pulls away, water can enter these vulnerable spots.

We check flashing carefully because worn flashing often causes leaks. Our repairs include resealing or replacing flashing to keep the roof fully watertight and strong.



Our Flat Roof Repair Process

We focus on careful examination and selecting the right materials. Then, we use proven repair methods. Finally, we check all work to ensure lasting results and safety.

Inspection and Assessment

We begin by thoroughly inspecting the flat roof to find damage or weak spots. This includes checking for cracks, water pooling, blisters, or worn areas.

Our team looks at the roof’s drainage system to spot any blockages or problems that could cause leaks. We also examine the roof’s surface and seams closely. After the inspection, we assess the type and extent of damage. This helps us create a tailored repair plan focused on fixing the most critical issues first.

Material Selection

Choosing the right materials is key to a strong repair. We pick materials based on your roof type and the local weather conditions. Common materials include modified bitumen, EPDM rubber, TPO membranes, and liquid-applied coatings. Each has specific strengths and suits different repair needs.

We also consider how long the materials last and their maintenance needs. Our goal is to find a balance of cost, durability, and effectiveness for your roof.

Repair Techniques Applied

Depending on the damage, we use patching, sealing, or replacing parts of the roof membrane. We ensure all seams and edges are sealed tightly. For small leaks, we apply waterproof coatings or sealants that bond well with the existing roof surface. Larger damage may require removing and replacing sections of the roofing material.

We also fix drainage issues and clear debris to prevent further water accumulation. Our methods are designed to stop leaks and extend the roof’s life.

Final Quality Checks

After repairs, we perform a detailed quality check. We inspect all sealed areas and repaired sections to confirm no gaps or weak points remain. We test for water tightness by looking for potential leaks through visual inspection and sometimes water testing. Any issues found are addressed immediately.

Our final step includes clearing the work site and advising on maintenance to help keep your flat roof in good shape for years to come.

Materials Used for Repairs

We choose specific materials for flat roof repairs based on durability, weather resistance, and cost. Each type offers different benefits, making it important to match the material to the roof’s needs and condition.

Modified Bitumen

Modified bitumen is a common choice for flat roofs because it is strong and flexible. It is made by adding rubber or plastic to asphalt, which helps it handle temperature changes without cracking.

This material is usually applied in layers using heat or adhesives. It creates a waterproof barrier that protects the roof from leaks. Modified bitumen is good for roofs that face harsh sun and heavy rain.

We find that it’s easy to repair or patch if damage occurs. Its durability makes it a solid option for many commercial and residential buildings.

TPO and EPDM

TPO (Thermoplastic Olefin) and EPDM (Ethylene Propylene Diene Monomer) are two popular single-ply roofing membranes. Both are lightweight and offer good resistance to UV rays and chemicals.

TPO is known for its heat-reflective properties, which can reduce cooling costs. It comes in white, gray, and tan colors. EPDM is usually black and great for colder climates because it retains flexibility in low temperatures.

Both are installed by heat welding or adhesives. They are easy to maintain and have a lifespan of 20-30 years. We recommend these materials for flat roofs needing cost-effective, long-lasting solutions.

Built-Up Roofing

Built-Up Roofing (BUR) is made from multiple layers of roofing felt and bitumen, usually tar or asphalt. These layers are topped with gravel or mineral surface to protect against sun damage.

The many layers make BUR very strong and resistant to water penetration. It also offers excellent fire resistance. However, BUR is heavier and can take longer to install.

We use BUR when durability and protection are key priorities, especially on commercial roofs. It requires less maintenance and provides solid protection against harsh weather.

FAQs Flat Roof Repair

We answer common questions about flat roof repairs, including typical problems, costs, materials, and customer feedback. We also explain how we decide between repairs and full replacements and why we are a strong choice for your roofing needs.