Das Team der Fa. Hasler hat uns bei der Umsetzung von unserem neuen Dachfenster super beraten, das Baugesuch erstellt und die Arbeiten sehr sauber und speditiv erledigt.

kompetent und fair

Roli GmbH , based in Basel, is a regionally active and specialized service provider focused on leak detection and waterproofing inspections for flat roofs . We support property developers, architects, facility managers, and insurance companies in the reliable analysis and maintenance of flat roof systems – from single-family homes to industrial buildings. With years of experience and the use of advanced technologies, we are a trusted partner for precise, non-invasive leak detection , technically sound inspection methods , and clear, structured documentation . Our guiding principle: Find the root cause – not just treat the symptoms . Our Core Services Flat Roof Leak Detection Using cutting-edge technologies such as moisture sensors, smoke tests, thermography, and electronic pulse systems, we locate weaknesses quickly and accurately – even in complex roof constructions. Waterproofing Integrity Testing For both new and existing buildings, we verify the performance of waterproofing systems before handover or use – with fully documented, protocol-based and independent testing procedures. Roof Inspection with Report We carry out structured condition assessments of flat roofs, including photo documentation and maintenance recommendations – ideal for damage prevention or decision-making in renovations. Expertise Across All Roof Types Experienced in cold roofs, warm roofs, inverted roofs, green roofs, and walkable/drivable roof systems. Who We Work With • Architects & General Contractors – for acceptance tests or quality assurance • Property Managers & Homeowners – for water damage diagnostics, leak assessment or renovation planning • Insurance Companies & Surveyors – for neutral and technical evaluations • Industrial & Commercial Clients – for routine roof checks and safety assessments Locally Rooted – Available Nationwide Our core service area includes Basel, Basel-Landschaft, Aargau, Solothurn, and the Northwestern Switzerland region. Upon request, we are also available throughout Switzerland. Flexibility, short response times, and clear communication are our daily standards. Why Roli GmbH? • Independent & Objective: We don’t sell sealing materials – we identify causes. • Technically Reliable: Use of professional-grade tools and methods • Documented & Transparent: You receive clear inspection reports, including testing protocols if needed • Client-Focused: Personal consultation, transparent process, and fair pricing Roli GmbH – We make flat roofs understandable. A hidden leak? We’ll find it – before it becomes expensive.

Are you looking for a professional roofing company that will provide you with quality work and reliable service? Then you have come to the right place! As experienced roofers, we offer a wide range of services including roof repairs, roof restorations, new roof construction and much more. Our experienced team is made up of highly trained professionals who complete each project with care and precision. We only use the best materials to ensure your roof is strong and durable. We also place great importance on customer satisfaction and work closely with you to ensure that all of your needs are met. If you are looking for a reliable roofing company, do not hesitate to contact us. Our friendly and knowledgeable team is always available to help you with any questions or concerns. Trust us when it comes to your roof and enjoy a worry-free, long-lasting solution. Contact us today to schedule an appointment!

Pitched roofs The traditional roof shapes protect the building permanently from all weather influences. Materials such as clay or concrete tiles, fiber cement, natural slate or metal require not only traditional craftsmanship but also technical knowledge in their application. We would be happy to advise you on this and offer you a solution tailored to your property. Flat roofs The flat roof is particularly popular in modern architecture. Its advantages are better use of space, accessibility (as a terrace or garden) and its storm resistance. With competent advice and good craftsmanship, it fulfills its task perfectly for decades, contrary to many opinions. By greening flat roofs, ecologically valuable open spaces can be reclaimed. Services: For your safety, we recommend our periodic inspection service. This includes: Visual inspection of the roof for damage or loose parts Replacing defective roof material, etc. Checking and cleaning sheet metal connections We would be happy to advise you personally. We look forward to your inquiry.

Super Beratung und sehr gute Arbeitsausführung