Torch-On Membrane Waterproofing in Malaysia
Torch-on membrane waterproofing in Malaysia costs about RM7 to RM9 per sq ft in 2026, with a 10-year warranty. Bitumen membrane sheets are heat-welded onto a primed concrete roof, car porch or slab, with overlapping laps sealed by torch. Our technician inspects for free and quotes on the spot; most porches are done in one to two days.
Book a free inspection
Torch-on membrane is one of the most common ways to waterproof flat concrete roofs in Malaysia. It is a thick bitumen sheet, reinforced inside, that is laid over a primed surface and melted into place with a gas torch. The overlaps between sheets are fused together, so the finished roof is one continuous waterproof layer. It handles ponding water and tropical heat well when it is installed properly.
Our CIDB-registered installation partner lays torch-on membrane on car porches, shophouse rooftops, roof slabs and terrace extensions across the Klang Valley, including Petaling Jaya and Shah Alam, as well as Johor, Penang, Perak, Kedah, Negeri Sembilan, Melaka and Kuantan. Book a free inspection and our technician will confirm whether torch-on is the right membrane for your roof.
When a torch-on membrane is the right choice
Torch-on works best on flat or low-slope concrete surfaces that need a durable, thick waterproofing layer. It is often recommended when an old coating has failed, or when a previous membrane has blistered or opened at the laps.
- Car porch roofs leaking at the slab or at the house wall joint
- Shophouse and terrace extension roofs with regular ponding
- Roof slabs under water tanks or mechanical equipment
- Old membranes with open laps, blisters or tears
- Roofs where a coating has cracked and keeps peeling
How torch-on membrane is installed
The membrane itself is only part of the job. Most early failures we see come from poor preparation or rushed laps, so our site team works in a set order.
- Surface check: confirm the roof falls to its drains and mark ponding areas
- Preparation: remove loose old layers, clean and dry the slab, repair cracks and broken edges
- Primer: apply bitumen primer so the membrane bonds to the concrete
- Torching: roll out the sheets, heat-weld them down and fuse every overlap
- Detailing: turn the membrane up walls and parapets, and reinforce drains, corners and pipe penetrations
- Final check and water test, then handover with the 10-year warranty
Torch-on vs liquid membrane vs coating
Each system has its place. Torch-on is thick and tough, and good for open, simple roofs. Liquid membrane is seamless and easier to apply around many pipes, brackets and odd shapes. A ceramic coating reflects heat but is not a waterproofing membrane on its own. For a full comparison, see roof waterproofing.
Torch-on involves an open flame, so it must be laid by trained crews with fire safety precautions. That is one more reason not to treat it as a DIY job.
- Torch-on bitumen: thick, durable, suits porches and open flat roofs
- Liquid membrane: seamless, suits complex details and tight spaces
- Mineral-finished membrane: a granule top layer that helps protect exposed roofs from UV
- Coating on top: optional, for heat reduction
Torch-on membrane price in Malaysia (2026 indicative)
Torch-on membrane is priced per square foot of roof area. The indicative 2026 range is the same as liquid membrane, RM7 to RM9 per sq ft, with a 10-year warranty. The exact price is confirmed after the free inspection, because removal of old layers, crack repair, upstands and access all change the scope.
Our process: inspection, quote, works, warranty
- Book online with your address and photos of the roof and the ceiling below
- We confirm a free inspection with the nearest branch team, usually within 1 to 3 working days
- Our technician measures the roof, checks the old layers and quotes on the spot
- You confirm and pay a deposit; we schedule the works in dry weather
- Balance on completion, and the 10-year warranty is issued
Looking after a torch-on roof
A torch-on membrane needs little maintenance, but it is not indestructible. Keep drains clear so water does not pond for days, avoid placing sharp objects or heavy equipment directly on it, and reseal properly if anyone drills through it for aircond, solar or pipes. A quick check after the monsoon season helps spot any lifted laps early.
Indicative prices (2026)
| Job | Price range | Warranty |
|---|---|---|
| Torch-on or liquid membrane waterproofing (flat/concrete roof, slab, car porch) | RM7 – RM9 per sq ft | 10 years |
| Minor roof leak repair (small area) | RM350 – RM1,800 | Up to 1 year workmanship |
| Roof inspection + on-the-spot quotation | FREE (remote areas RM150) | — |
Indicative ranges in Malaysia. The exact price is confirmed after the free inspection (roof design, pitch, access and damage).
What happens after you book
Tell us the problem
Send your address and a few photos. Tell us if it leaks only when it rains or also when it is dry.
Free inspection
A technician visits within 1–3 working days, water-tests and checks the roof, and shows you the cause.
Quotation on the spot
A clear written quotation. No obligation. Deposit only when you confirm.
Works + warranty
Our site team completes the job and you receive a written workmanship warranty.
Frequently asked questions
How much is torch-on membrane waterproofing in Malaysia?
Torch-on membrane waterproofing in Malaysia is indicatively RM7 to RM9 per sq ft in 2026, with a 10-year warranty. A 300 sq ft car porch would therefore cost roughly RM2,100 to RM2,700. The exact price is confirmed after our free inspection, depending on preparation, removal of old layers, upstands and access.
What is torch-on membrane?
Torch-on membrane is a reinforced bitumen waterproofing sheet. It is laid on a primed concrete surface and heated with a gas torch so it bonds to the slab, and each overlap is fused to the next sheet. The result is a thick, continuous waterproof layer, commonly used on flat roofs and car porches in Malaysia.
How long does torch-on membrane last?
Our torch-on membrane works carry a 10-year warranty. Real-world life depends on surface preparation, drainage and use. Roofs with blocked drains, constant ponding or frequent foot traffic wear faster, while a well-drained porch with clear outlets performs best. A simple post-monsoon check helps keep it in good shape.
Torch-on or liquid membrane: which is better?
Neither is better everywhere. Torch-on is thick and tough, ideal for open flat roofs and porches. Liquid membrane is seamless and easier around many pipes, brackets and complex shapes. Both are priced at RM7 to RM9 per sq ft. Our technician recommends one after seeing your roof during the free inspection.
How long does it take to install torch-on membrane?
A typical car porch is completed in one to two working days, including preparation. Larger shophouse or bungalow roofs take longer. Because the membrane must go onto a dry surface, works are scheduled around the weather, and heavy afternoon rain can push the timeline by a day.
Can torch-on membrane be laid over an old membrane?
Sometimes. If the old membrane is still firmly bonded and the problem is limited to a few laps or blisters, it may be repaired and overlaid. If it is loose, waterlogged or widely cracked, it must be removed first. Our technician checks this during the inspection and includes it in the quote.
Is torch-on membrane safe for my house?
Yes, when it is laid by trained crews. Torch-on uses an open flame, so our site team follows fire safety practice, keeps extinguishers on site and takes care near timber, fascia boards and plastic pipes. In tight or sensitive spots, a liquid membrane may be recommended instead.
Do you do torch-on membrane in Petaling Jaya and Shah Alam?
Yes. Petaling Jaya and Shah Alam are within our Klang Valley coverage, along with the rest of Selangor and Kuala Lumpur. Inspection and quotation are free, and the indicative price is the same RM7 to RM9 per sq ft range used nationwide.
Areas we cover
Klang Valley, Putrajaya, Negeri Sembilan & Melaka
Kuala Lumpur, Petaling Jaya, Shah Alam, Subang Jaya, Puchong, Cheras, Klang, Kajang, Seri Kembangan, Ampang, Kepong, Setia Alam, Cyberjaya, Putrajaya, Rawang, Bangi, Semenyih, Damansara, Bukit Jalil, Sungai Buloh, Seremban, Nilai, Melaka
Johor
Johor Bahru, Skudai, Kulai, Pasir Gudang, Iskandar Puteri, Batu Pahat, Muar, Kluang
Penang, Kedah, Perak & Kuantan
Penang, Bukit Mertajam, Butterworth, Bayan Lepas, Ipoh, Taiping, Alor Setar, Sungai Petani, Kulim, Kuantan
