Find Waterproofing Experts Who Speak Your Language
Find a waterproofing specialist who speaks English.
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Tomas
I hired Jason to trim my wooden bedroom door so it would fit over my new carpet. He came once at the beginning of the month, cut about 2 cm...
I hired Tomas to fix a leaking rooftop terrace. We couldn’t find the source, so we’re re-flooring and waterproofing the whole upstairs deck, enclosing part of it, and adding a...
Frequently Asked Questions
In Lisbon, roof and terrace waterproofing are the most frequent due to flat roofs and exposure to Atlantic weather. Balconies, bathrooms (wet rooms), and basements/garages also need attention, especially in older masonry buildings prone to rising damp. Regular damp proofing and leak detection help prevent costly damage.
Prices are set by individual contractors and paid directly to them, but typical ranges help with budgeting. As a guide: roof or terrace membranes often run €30–€80 per m²; bathroom waterproofing membranes €200–€600 per room; basement tanking/injection €50–€150 per m²; leak detection surveys €80–€250. Access, repairs, and finishes affect totals.
For common elements (roofs, façades, terraces above other units), you’ll usually need condominium approval before works proceed. Internal waterproofing inside your flat rarely needs a licence, but always check building rules and, if altering structure or drainage, consult Câmara Municipal de Lisboa. Written approval avoids disputes later.
Expect an inspection with moisture readings and leak tracing, followed by surface preparation, repairs, primer and membrane application, and curing. A small bathroom can take 1–2 days plus curing; terraces and roofs often need several days, weather permitting. Good contractors plan around rain and provide a clear schedule.
UV-resistant and flexible systems perform well: liquid polyurethane or PMMA membranes for terraces and complex details, bituminous SBS/APP or EPDM/TPO for flat roofs, and cementitious slurries for bathrooms and basements. For older stone masonry, breathable damp-proof solutions and vapour management help combat salt and humidity.
Ask for recent Lisbon references, photos of comparable jobs, and a written method statement detailing materials, thicknesses, and preparation. Insist on an itemised quote in English with scope, timeline, cleanup, and warranty terms. Check independent reviews, response times, and whether they provide moisture diagnostics before proposing solutions.
Reputable contractors often offer 5–10 years for roof and terrace membranes and around 1–3 years for bathroom waterproofing. Warranty validity usually depends on correct maintenance and not puncturing the membrane. Keep all documentation, photos, and invoices, and schedule periodic inspections to preserve coverage.
Waterproofing addresses the cause, but you’ll still need remediation to remove mould and repair salt-damaged plaster. A full approach includes drying, salt-resistant re-plastering, anti-fungal treatments, and improved ventilation or dehumidification. Proper diagnosis ensures you treat rising damp, leaks, or condensation appropriately.
Many contractors offer same-day or 24-hour temporary patching or tarping during rain, with permanent works scheduled when surfaces are dry. Expect a call-out fee and weather-related constraints. Clear photos, the exact location of the leak, and access details help speed up the response.
Many waterproofing contractors in Lisbon speak English and use WhatsApp or email for quick photo sharing and measurements. Request a bilingual, itemised quote covering scope, materials, m², warranty, timeline, VAT, and payment schedule. Agree on updates and site access in writing to avoid misunderstandings.
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Dos and Don’ts to choose the right Waterproofing as an Expat
Key dos and don’ts for selecting the ideal waterproofing service
Choose a waterproofing service provider who demonstrates clear and regular communication throughout the project. This ensures you are always updated on progress and any necessary adjustments, fostering trust and collaboration.
Select a provider who is willing to adapt to changing circumstances and unexpected issues during the project. Their ability to maintain professionalism and flexibility is key to successfully navigating complex waterproofing challenges.
Look for a provider who prioritizes site cleanliness, as maintaining a clean work environment reflects their professionalism and respect for your space. This ensures a smoother project and minimizes disruption to your daily routine.
Choose a service provider known for punctuality and timely completion of projects. Efficient service not only saves you time but also provides a valuable return on investment, justifying the costs associated with waterproofing.
Failing to research the background and reputation of waterproofing contractors can lead to hiring unqualified workers who may not deliver quality results. Always check reviews, references, and previous projects to ensure their capability in handling complex waterproofing tasks.
Choosing a contractor who does not communicate effectively can result in misunderstandings and unsatisfactory outcomes. It's crucial to ensure that your service provider keeps you informed and is receptive to your concerns throughout the project, facilitating a smoother workflow.
Overlooking the cleanliness and organization of a contractor's job site could lead to additional mess and issues at the end of a project. Ensure that maintenance of a tidy work area is part of the agreement, as this reflects their professionalism and care for your space.
Hiring a service provider without discussing the pricing structure upfront can lead to unexpected costs and financial surprises down the line. Always ask for a detailed breakdown of costs and potential additional charges to avoid confusion and ensure a fair deal.
Navigating the waterproofing landscape involves more than just selecting a service provider; it's about building a relationship based on trust and effective communication. By adhering to these essential dos and don’ts, you'll empower yourself to make informed choices, ensuring that your waterproofing needs are met with professionalism and care. Emphasizing clarity in communication and maintaining a clean work environment can transform your project experience, while being vigilant about transparency and thorough research can save you from future headaches. Embrace these guidelines to secure a lasting partnership that not only addresses your current challenges but also enriches your overall peace of mind.
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