- First Centre, #02-01, 50 Serangoon North Ave 4, Singapore 555856
- 9am – 6pm (All Days)
Building Contractor
of Experience
Projects Completed
Warranty
28+ Google Reviews
From leak detection to lasting repairs, we provide end-to-end solutions to protect and enhance your property.
Read more, or WhatsApp us, to find out more about our services.
Complete roofing solutions for residential, commercial and industrial properties.
Advanced waterproofing systems for all types of surfaces and structures.
Specialised injection and grouting solutions to stop leaks and strengthen structures.
Restore and strengthen damaged concrete for long-term durability and safety.
Identify the source and provide effective solutions for all types of water leaks.
Waterproofing and repair solutions for underground and below-ground structures.
Design, supply and installation of durable awnings and canopies for protection and comfort.
Improve load-bearing capacity and structural performance of buildings.
LE FONG BUILDING SERVICES PTE LTD is a registered Singapore Waterproofing Contractor with the Building and Construction Authority (BCA). We aim to be the most reputable and effective company in the waterproofing industry.
Our foremost objective is to provide our customers with high-quality materials at a reasonable rate. Always striving to meet the expectations of our customers, we deliver our work in a timely manner. We ensure all our objectives are met to uphold the name Waterproofing Specialist.
From our base in Serangoon, we provide waterproofing and leakage solutions for residential, commercial and industrial properties across Singapore.
Q: What should I do immediately if my ceiling is leaking in Singapore?
A: Contain the water, move valuables, switch off nearby electrical circuits if safe, and record photos/videos showing when the leak occurs. Send these to Le Fong for assessment before repair decisions.
Q: Are brown stains always caused by leaks?
A: Brown stains indicate long-term moisture exposure but may come from rain ingress, failed waterproofing, plumbing, or cracks. Professional investigation is recommended.
Q: Why does my leak only appear during heavy rain?
A: Rain-only leaks usually point to roof, external wall, window, or balcony detailing issues.
Q: Why do some leaks come and go?
A: Intermittent leaks are caused by changing conditions such as rain intensity, wind direction, temperature, or usage patterns.
Q: Do you investigate first or recommend hacking immediately?
A: Le Fong follows an investigation-first approach and recommends the least disruptive effective solution.
Q: How accurate is thermal imaging?
A: Thermal imaging identifies moisture-related temperature differences and is used alongside physical checks.
Q: How do you tell if a leak is plumbing or waterproofing related?
A: Plumbing leaks correlate with usage, while waterproofing leaks correlate with rain or exposure.
Q: Is water dripping to the unit below always a toilet waterproofing issue?
A: Not always. It may involve pipes, floor traps, joints, or cracks.
Q: Can toilet waterproofing be done without hacking?
A: Yes, subject to surface condition and confirmed leak path.
Q: When is hacking unavoidable?
A: When substrate failure, loose tiles, or widespread waterproofing failure is present.
Q: Why is my balcony leaking into my living room?
A: Common causes include failed membranes, screed cracks, poor threshold detailing, and blocked outlets.
Q: Can window frame seepage be fixed permanently?
A: Yes, by treating the external source, not just repainting internally.
Q: Why does my roof leak only during heavy rain?
A: Heavy rain exposes weak points such as gutters, joints, flashing, and penetrations.
Q: Do you provide metal roof waterproofing?
A: Yes, including long-term systems suitable for Singapore’s climate.
Q: Do you provide warranty?
A: Yes, up to 10 years depending on system and scope.
Q: What is PU injection?
A: A method using expanding polyurethane to stop active water ingress.
Q: Is PU injection permanent?
A: Effective when applied correctly, but long-term performance depends on root cause.
Q: PU vs epoxy injection?
A: PU stops water ingress; epoxy restores structural integrity.
Q: How much does waterproofing cost in Singapore?
A: Cost varies based on leak source, access, area size, and system selection.
Q: Why do cheap waterproofing repairs fail?
A: They often skip proper diagnosis.
Q: How long does waterproofing last?
A: Typically 5–15 years depending on system, workmanship, and maintenance.
