Torch-On Membrane Waterproofing in Kajang
Looking for torch-on membrane waterproofing in Kajang? Our site teams in Selangor lay heat-welded bitumen membrane on car porches, flat roofs and roof slabs, indicatively RM7 to RM9 per sq ft with a 10-year warranty. Book a free inspection and receive a written quotation on the spot, with the cause explained in plain terms.
Book a free inspection
Torch-on membrane suits flat roofs on Kajang town shophouses and terrace extensions, at RM7 – RM9 per sq ft.
Common roof problems in Kajang
- Leaves from surrounding greenery block gutters and valley gutters, causing overflow into ceilings.
- Ridge mortar on 1990s terraces has cracked and loosened under sun and rain.
- Termites damage timber trusses in older homes, causing sagging and displaced tiles.
Neighbourhoods we serve in Kajang
Sungai Chua, Saujana Impian, Taman Prima Saujana, Taman Kajang Utama, Country Heights, Jalan Reko, Bandar Sungai Long
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
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
What is the torch-on membrane price in Kajang?
The indicative price in Kajang is RM7 to RM9 per sq ft, with a 10-year warranty. The final price for your Kajang roof is confirmed after the free inspection and measurement.
How fast can you start torch-on works in Kajang?
Inspection slots in Kajang are usually available within 1 to 3 working days. Once you confirm the quote, our Kajang site team schedules works in the next suitable dry weather window.
Do you waterproof car porches in Kajang?
Yes. Car porch roofs are one of the most common torch-on jobs we do in Kajang, including the joint where the porch meets the house wall.
Do you cover Sungai Long, Saujana Impian and Kajang town?
Yes. Kajang is covered by our central team, including Kajang town, Sungai Chua, Saujana Impian, Taman Prima Saujana, Taman Kajang Utama, Country Heights and Bandar Sungai Long. Roof inspections and quotations are free. Book online and send a few photos of the problem.
How fast can a roofer come to Kajang?
Free inspections in Kajang are usually arranged within 1–3 working days. In storm season, slots go quickly, so book when you first see a stain. Photos or videos of the leak and the gutters nearby help our technician prepare and give you an accurate quote on the spot.
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.
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