Roof Waterproofing in Kajang
Need roof waterproofing in Kajang? Our site teams in Selangor waterproof flat concrete roofs, car porches and shophouse rooftops with liquid or torch-on membrane systems, priced at about RM7 to RM9 per sq ft with a 10-year warranty. Book a free inspection and get a written quote on the spot, with no obligation to proceed.
Book a free inspection
Flat porch roofs and extensions in Sungai Chua and Saujana Impian commonly need full waterproofing after years of ponding.
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
Signs your flat roof needs waterproofing
A concrete roof can look fine from the top while water is already moving through the slab. Look out for these signs, especially after a few heavy afternoon storms in a row.
- Water ponding for more than a day after rain
- Damp patches, efflorescence (white salt marks) or peeling paint on the ceiling below
- Cracks in the screed or old coating, or blisters and bubbles in an old membrane
- Gaps at the joint between the porch slab and the house wall
- Rust stains from exposed reinforcement bars, a sign water has been getting in for years
- Leaks around drains, aircond trunking or pipe penetrations through the slab
How we waterproof a concrete roof
Good waterproofing is mostly preparation. A new membrane laid over a wet, dusty or cracked surface will fail early, so our site team follows a fixed sequence.
- Inspect and test: check falls to the drain, ponding areas, cracks and the condition of any old coating
- Prepare: remove loose or failed material, clean the surface and let it dry
- Repair: fill cracks, correct low spots where practical, and treat corners and upstands
- Prime and apply the membrane, with extra reinforcement at drains, edges and penetrations
- Water test where possible, then hand over with photos and the 10-year warranty
Indicative prices (2026)
| Job | Price range | Warranty |
|---|---|---|
| Liquid or torch-on membrane waterproofing (flat/concrete roof, slab, car porch) | RM7 – RM9 per sq ft | 10 years |
| Ceramic / heat-reflective roof coating | About RM6 per sq ft | 5 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 flat roof waterproofing in Kajang?
Membrane waterproofing in Kajang is indicatively RM7 to RM9 per sq ft with a 10-year warranty. The exact price for your Kajang property is confirmed after our free inspection, once we have measured the area and checked the surface.
Can you waterproof a shophouse roof in Kajang?
Yes. Our site teams handle shophouse and commercial flat roofs in Kajang. Larger roofs over 5,000 sq ft receive a formal quotation after a site survey.
How soon can you come to Kajang for a waterproofing inspection?
Most Kajang addresses get a free inspection slot within 1 to 3 working days. Book online any time and we will confirm the nearest team serving Kajang.
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 does roof waterproofing cost in Malaysia?
Liquid or torch-on membrane waterproofing for flat concrete roofs, slabs and car porches costs about RM7 to RM9 per sq ft in 2026, with a 10-year warranty. A 250 sq ft car porch, for example, would fall roughly between RM1,750 and RM2,250. The exact price is confirmed after the free inspection based on preparation, access and roof condition.
What is the best waterproofing for a flat roof in Malaysia?
For most flat concrete roofs in Malaysia, a properly installed membrane system works best, either torch-on bitumen sheets or a liquid-applied membrane. Torch-on suits larger open roofs and porches, while liquid membrane suits complex shapes and many penetrations. The choice depends on the roof, so our technician recommends one after inspection.
How long does roof waterproofing last?
A well-prepared membrane system on a Malaysian flat roof is backed by our 10-year warranty. How long it lasts in practice depends on preparation, drainage and how the roof is used. Blocked drains, ponding and new holes drilled through the membrane are the main things that shorten its life, so simple maintenance helps a lot.
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