D15 · Premium Landed
Roof Waterproofing in Siglap, Singapore
Siglap roofs combine the worst of both Singapore waterproofing problems: full monsoon exposure plus salt-laden air from the coast. Membranes here fail noticeably faster than inland equivalents, with original 10-year-rated systems sometimes failing at 7 years. Owners often misdiagnose the issue and patch repeatedly before accepting a full strip-and-replace is needed.
Why Siglap
Roof Waterproofing for Siglap homes
The dominant housing stock is 1980s flat-roof detached homes whose original waterproofing has typically been patched two or three times by the current owner. Persistent ceiling staining on the upper floor is the trigger. Full system replacement with torch-on bitumen plus a UV protective topcoat is the most common spec, with marine-grade flashings on penetrations and parapet edges.
Premium-standard pricing, S$12,000–S$25,000, given the larger roof areas typical of detached homes here and the need for higher-spec materials to handle salt exposure. Premium 10-year warrantied systems are the only sensible choice.
A home off Siglap Road had its 1,400 sqft flat roof fully stripped after 7 years of repeated leaking. Torch-on bitumen reinstall with UV topcoat, full flashing replacement in marine-grade aluminium, and an additional drainage outlet to handle peak rainfall.
Pricing Guide
What to Budget in Siglap
Budget
$5,000 – $10,000
Acrylic coating system, suitable for minor leaks and recoating
Mid-Range
$10,000 – $18,000
Torch-on modified bitumen membrane with 10-year warranty
Premium
$18,000 – $25,000
Full system replacement: membrane, insulation, drainage, flashings
Prices are indicative for Siglap (D15) and vary by project scope. Get a personalised quote.
Common Questions
Roof Waterproofing in Siglap — FAQ
How much does waterproofing cost per square foot in Singapore?
Waterproofing costs $8–$25 per square foot depending on the system. Basic PU coating runs $8–$12/sqft. Torch-on membrane systems cost $15–$20/sqft. Premium cementitious systems with fabric reinforcement run $20–$25/sqft. Total project costs typically range from $5,000 to $25,000.
What is the best waterproofing method for a flat roof?
For Singapore flat roofs, torch-on modified bitumen membranes offer the best balance of durability and cost. They last 10–15 years and handle our UV and rainfall conditions well. For roofs with heavy foot traffic, cementitious waterproofing with a protective screed is preferred.
What is the difference between torch-on membrane and liquid membrane?
Torch-on membranes are pre-formed sheets heat-welded to the surface — very durable (10–15 years) but require skilled application. Liquid membranes (PU coatings) are painted on, easier to apply around complex shapes, but last 5–8 years. We recommend torch-on for large flat areas and liquid for detailed work.
Can you fix a roof leak as an emergency?
Yes. We offer emergency leak response for active roof leaks. Temporary waterproof patches can be applied within 24–48 hours to stop immediate damage, followed by a permanent repair scheduled when weather permits.
What warranty do you offer for roof waterproofing?
Our premium torch-on membrane systems come with a 10-year material and workmanship warranty. PU coating systems carry a 5-year warranty. All warranties cover both materials and labour for any leak that develops in the treated area.
How long does roof waterproofing last?
Quality membrane systems last 10–15 years. Polyurethane coatings typically last 5–8 years before recoating is needed.
Have a different question? See the full Roof Waterproofing guide or WhatsApp us.
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