How to 👷‍♂️ Solving Recurring Roof Leaks in Singapore: A Case Study on RC Flat Roof Waterproofing?

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IntroductionIn Singapores tropical climate waterproofing isnt just a luxuryits a necessity. With intense UV rays during the day and torrential Northeast Monsoon rains at night building materials undergo extreme thermal expansion and contraction.Recently High Tech Roofing amp Waterproofing was called to a residential project in a landed estate where the homeowner had already engaged two different contractors yet the leaks persisted. This case study explores how a deep-dive inspection and specialized membrane application finally solved the problem.The Challenge The Ghost LeakThe client a homeowner of a three-story semi-detached house was frustrated. Every time a heavy downpour hit a large water stain appeared on the master bedroom ceiling.Previous AttemptsContractor A applied a quick-fix sealant over the visible cracks.Contractor B suggested painting over the ceiling with waterproof paint.Both failed because they addressed the symptom not the source. In Singapores high-density housing water often travels along concrete beams meaning the actual entry point can be meters away from where the drip appears.The High Tech Solution A 3-Step Specialist ApproachStep 1 Thermal Imaging amp Moisture DetectionInstead of guessing our team used thermal imaging cameras to trace the moisture path. We discovered that the leak wasnt coming from the ceilings center. Instead water was entering through a hairline crack near a solar panel mounting bracket on the roof edge.Step 2 Substrate Preparation The Secret to LongevityMany contractors skip this but we dont. We used high-pressure water jetting 2000 PSI to remove old peeling silver paint and carbonation layers. This revealed that the concrete underneath was saturated. We waited for a 48-hour dry window to ensure the new membrane would bond perfectly.Step 3 Multi-Layer Polyurethane PU MembraneWe chose a Liquid-Applied Polyurethane Membrane for this project.Why Unlike traditional torch-on membranes PU is seamless. It flows into every corner and creates a flexible rubber-like skin that moves with the building.Reinforcement We added a fiberglass fleece layer to the joints to ensure that future structural movement wouldnt tear the waterproofing.The Results 100 WatertightFollowing the application we conducted a 24-hour Ponding Test standard BCA procedure. We plugged the drains and flooded the roof with 2 inches of water.Outcome Zero seepage.Bonus The reflective white topcoat reduced the surface temperature of the roof by 5C lowering the clients air-conditioning costs.Key Takeaways for Singapore HomeownersDont DIY Roof Leaks Surface sealants from hardware stores are temporary fixes that trap moisture inside the concrete leading to spalling concrete.Check Your Flashings 80 of leaks in terrace houses occur at the metal transition flashing between your roof and your neighbors wall.Insist on a Warranty A professional waterproofing job in Singapore should come with at least a 5-year warranty.ConclusionDont let a small leak turn into a structural nightmare. At High Tech Roofing amp Waterproofing we are BCA-registered specialists dedicated to protecting Singaporean homes from the elements.Need a Professional InspectionContact the specialists at High Tech Roofing amp Waterproofing today. CallWhatsApp 65 8292 6757 Email saleshightechroofing.com.sg Visit www.hightechroofing.com.sg

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👷‍♂️ Solving Recurring Roof Leaks in Singapore: A Case Study on RC Flat Roof Waterproofing