D20/D26 · Premium Landed
Roof Waterproofing in Thomson, Singapore
Thomson roof waterproofing splits between the older Upper Thomson cohort (where 1980s/90s flat roofs need full strip-and-reinstall) and the newer Lentor and Springleaf clusters (where first-cycle 2018+ membranes are still well within service life). Most current waterproofing work concentrates on the older Upper Thomson belt.
Why Thomson
Roof Waterproofing for Thomson homes
Established Upper Thomson homes typically have modest 700–1,000 sqft flat roofs with original membranes well past service life. Full strip-and-reinstall is the dominant scope. Some newer homes have rooftop terraces or accessible decks, where tile-over waterproofing requires more complex layered systems. PU coatings appear at the value end; torch-on bitumen with 10-year warranty at the standard end.
Premium-standard pricing range, S$8,000–S$18,000. Standard flat-roof reinstall at S$8,000–S$13,000; rooftop terrace strip-and-reinstall at S$18,000–S$30,000.
A detached home off Old Upper Thomson Road had its 900 sqft flat roof stripped after years of recurring leaks. Torch-on bitumen reinstall with marine-grade aluminium flashings and rework of penetrations for air-con services. 6 days on-site.
Pricing Guide
What to Budget in Thomson
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 Thomson (D20/D26) and vary by project scope. Get a personalised quote.
Common Questions
Roof Waterproofing in Thomson — 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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