Hidden water leaks can remain unnoticed for weeks or even months, causing structural damage, mould growth, rising utility bills, and costly repairs. Professional leak detection helps pinpoint the source of water intrusion using advanced non-invasive techniques before significant damage occurs. Below are some of the most common locations where hidden leaks are found.

Hidden plumbing leaks inside walls can slowly damage drywall, insulation, and structural framing without obvious signs.

Underground water lines beneath basement floors or concrete slabs may develop leaks that are difficult to detect without specialized equipment.

Leaks from bathrooms, kitchens, or plumbing above can spread through ceilings before becoming visible inside living spaces.

Damaged seals, flashing failures, or exterior water intrusion can allow moisture to enter around windows and door openings.

Toilets, sinks, showers, bathtubs, water heaters, and appliance supply lines are common sources of hidden water leaks.

Leaks in underground water service lines can increase water bills, reduce water pressure, and saturate the surrounding soil without visible flooding.
Notice unexplained moisture, higher water bills, or signs of hidden water damage? Schedule a professional leak detection service today.
Whether you’re a returning client, property manager, or insurance professional, we offer preferred pricing as part of our long-term service relationships.
Our leak detection process is designed for accuracy, clarity, and reliability — from initial assessment and system review to targeted detection and clear reporting. We focus on identifying leak sources, documenting contributing factors, and providing objective insights to support informed decisions.
We begin with a detailed assessment of the property, reviewing visible areas for signs of water intrusion such as staining, dampness, or unexplained moisture. Our inspectors assess walls, floors, ceilings, and accessible plumbing areas to identify conditions that may indicate hidden leaks.
Leak detection often requires understanding plumbing layouts and environmental conditions. We review pipe locations, fixtures, water lines, pressure indicators, and surrounding materials to identify areas more prone to leakage or failure.
When appropriate, we perform targeted leak detection using industry-approved, non-invasive tools. Detection locations are selected based on assessment findings to accurately identify active or potential leak sources without unnecessary damage.
Advanced leak detection and moisture assessment coordination using non-invasive methods and calibrated equipment to help accurately identify hidden water intrusion within residential and commercial properties.
Collected detection data and observations are reviewed to confirm leak presence, location, and potential contributing factors. This step helps establish a clear understanding of current conditions and whether water intrusion may be ongoing.
We review the findings and provide a clear leak detection report outlining observations, detected leak locations, and relevant insights. Our goal is to help property owners understand the situation and consider appropriate next steps — without obligation for repair services.
A professional leak detection process provides accurate insight into water intrusion issues and helps reduce uncertainty before damage escalates.
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Gord PalbodTrustindex verifies that the original source of the review is Google.
outstanding crew. thank you for an excellent job to Farzam and his crew.Posted on Google![]()
Deb PyneTrustindex verifies that the original source of the review is Google.
I had googled for heavy duty cleaning that was needed for my Brother, (has some physical issues) I supplied them with pictures. They sent me a quote & the job was scheduled immediately as it was time sensitive. I met the GTA Gentleman @ the front door of my brother’s condo. They went straight to work & did such an amazing job. I was thrilled with the out come as it was a big job. I would definitely recommend them to anyone!! Very professional, friendly & very respectfulPosted on Google![]()
Amin HamediTrustindex verifies that the original source of the review is Google.
The 247-365 Restoration team responded quickly, arrived on time, and immediately took control of the situation. They were professional, well-organized, and clearly experienced in flood cleanup. Everything was explained step by step, and the cleanup was handled efficiently and carefully. A trustworthy choice for emergency water damage and flood restoration services.Posted on Google![]()
Sikander KanjiTrustindex verifies that the original source of the review is Google.
Amazing experience, very professional, clean work, helpful and amazing crew.Posted on Google![]()
Tiana RoseTrustindex verifies that the original source of the review is Google.
Nijen's team replaced and build a privacy wall on our back deck last Friday. They were professional, and efficient and we couldn't be happier with the end result. Thank you to Nijen and his team. We would definitely hire them again for our renovation needs and recommend them to everyone. TianaPosted on Google![]()
Mathew WhiteTrustindex verifies that the original source of the review is Google.
I engaged First On Site as a preferred vendor through my insurance provider following an unsatisfactory experience with another restoration company. Understandably, I approached the process with some hesitation. From the outset, the team at First On Site demonstrated exceptional professionalism. They maintained clear and consistent communication, keeping me informed of all timelines and progress updates. Their responsiveness and attention to detail far exceeded my expectations. Upon arrival, the crew began work immediately and remained focused and diligent throughout the day. Their efficiency, professionalism, and respect for my property were commendable. Additionally, the team effectively liaised with my insurance company, ensuring the scope of work was completed exactly as described and to a high standard. I would not hesitate to recommend First On Site to anyone requiring disaster management or restoration services. Their commitment to quality and client satisfaction is truly exemplary.Posted on Google![]()
siddharth khannaTrustindex verifies that the original source of the review is Google.
I called them at 7 am for an emergency basement pipe burst leakage and they sent out a crew within a couple of hours who knew exactly what needed to be done. They documented the damage thoroughly for insurance purposes and I faced no trouble. The team at GTA are professional and helpful. Totally recommend!Posted on Google![]()
Mark EsdaleTrustindex verifies that the original source of the review is Google.
After a ice storm related basement flood the GTA team showed us what service meant!. They were here very quickly, with the proper drying equipment and some great staff members. They removed old carpeting/under padding and the bottom 12 inches of drywall from the affected flood area, installed and left drying machines, were back in a week to repair the drywall. We could not have asked for a better job, very glad we chose them.Posted on Google![]()
Sanaz SadriTrustindex verifies that the original source of the review is Google.
An amazing experience during an unfortunate incident! A team of professionals... They showed up really fast, worked very efficient and extremely detailed. Majid is an amazing guy who keeps you calm and does an excellent job. Ahmad is a hardworking, honest, trust worthy man, whose support is impossible to overlook. Koodos to the entire team from clean up to repair... Thank you GTA Restoration, you guys are awesome!
Serving Toronto, the GTA, and communities across Southern Ontario with rapid response restoration, waterproofing, and emergency property services when and where you need them most.
Clear answers to common questions about professional leak detection services, inspection methods, timelines, and what to expect during the assessment process.
Yes. We offer professional basement moisture assessments focused on identifying dampness, moisture conditions, and contributing environmental factors.
Signs such as musty odours, visible damp areas, condensation, or concerns about humidity may indicate the need for a moisture assessment.
Most assessments are completed within a short on-site visit, depending on basement size and conditions being evaluated.
Yes. Our moisture detection methods are non-invasive and safe for occupied residential properties.
The process includes visual assessment, moisture measurement using approved tools, evaluation of basement conditions, and clear documentation of findings.
Early moisture detection can help identify contributing conditions and provide clarity before moisture-related issues become more complex.
If you’re noticing unexplained water damage, rising moisture levels, unusual water usage, or signs of a hidden leak, professional leak detection can help provide clarity. Our inspection-focused service is designed to locate leak sources accurately, document findings, and deliver clear results to support informed repair decisions — before damage escalates.