Metal Roof Waterproofing & Leak Repair in Malaysia
Where Does a Metal Roof Usually Leak
Metal roofs are durable and long-lasting, but without proper waterproofing over time, these issues can compromise the roof itself and the structure beneath it, leading to costly repairs and a shortened lifespan.
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Loose or Deteriorated Screws & Fasteners
Movement and ageing can loosen screws or damage washers, creating small openings where rainwater enters. -
Sheet Overlaps & Seams
Poorly sealed or deteriorated overlaps can allow wind-driven rain to penetrate between roof sheets. -
Flashing & Roof Junctions
Connections around walls, ridges, vents and penetrations are common leakage points. -
Rusted or Corroded Roof Sheets
Corrosion can weaken the metal surface and eventually create small holes that allow water penetration. -
Gutters & Drainage Areas
Blocked or deteriorated gutters can cause water to back up and enter vulnerable roof joints. -
Old Sealants & Previous Repairs
Sealants can harden, crack or lose adhesion after prolonged exposure to heat and UV.
Why Does My Metal Roof Keep Leaking After Repair?
A ceiling drip does not always appear directly beneath the point where rainwater enters. Water can travel along roof sheets, insulation, structural members and overlaps before becoming visible indoors.
Why Metal Roof Waterproofing Matters in Malaysia
Metal roofs are strong and long-lasting, but in Malaysia’s extreme climate plus metal naturally absorbs and transfers heat, a non-insulated metal roof can quickly turn your interior space hot and stuffy, forcing air-conditioning to work harder.
By applying ARCHTECH Waterproofing to prevents leaks and rust. At the same time, your roof gains a protective layer that reduces heat absorption, improves indoor comfort, and helps lower energy usage throughout the year.
Which Metal Roof Waterproofing Solution Do I Need?
| Metal Roof Problem | Likely Cause | Approach |
|---|---|---|
| Leak around screws | Loose fastener or damaged washer | Fastener treatment and flexible sealing |
| Leak along sheet overlap | Failed joint or roof movement | Joint reinforcement and waterproof coating |
| Rust spots on the roof | Surface corrosion | Rust treatment and protective waterproofing |
| Multiple small leaks | Ageing roof or deteriorated waterproofing system | Broader waterproof coating or membrane system |
| Leaks only during heavy rain | Wind-driven rain entering through joints, flashing or overlaps | Leak-source inspection and targeted waterproofing treatment |
| Recurring leak after previous repair | Root cause was not properly identified or incompatible materials were used | Full roof assessment and a compatible waterproofing system |
| Severely rusted or perforated roof sheets | Advanced corrosion and material deterioration | Roof sheet repair or replacement before waterproofing |
Repair, Recoat or Replace Your Metal Roof?
Metal roofs face challenges such as leaks at screw points, rusting sheets, deteriorated sealants, and weather expansion. Proper waterproofing protects your property from costly interior damage and ensures long-term durability. Our solutions serve both proactive planners and those facing immediate leakage issues.
Homeowners, Shops & Commercial Units
If your metal roof is severely aged or rusted, replacement is the most effective solution. ARCHTECH installs new metal roofing strengthened with a protective waterproofing layer that seals joints and penetrations, prevents future corrosion, and extends roof lifespan. Suitable for houses and shoplots, our systems deliver durable, weather-resistant protection against daily exposure and heavy rainfall.
Industrial & Large-Scale Metal Roof Structures
Industrial plants, warehouses, and facilities with large-span metal roofing require robust waterproofing to handle movement, vibration, and constant weather stress. ARCHTECH coating system is essential to prevent operational disruptions. We provides industrial-grade metal roof waterproofing designed to withstand harsh conditions, ensuring long-term protection and minimal maintenance.
How Our Experts Identify & Fix Metal Roof Leaks
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Root Cause Inspection
Our specialist inspects the metal roof to identify the actual source of leakage. This includes assessing roof sheet condition, fasteners, joints, sealant integrity, drainage paths, corrosion, and signs of thermal movement before recommending any solution. -
Surface Preparation & Repair
Once the cause is identified, necessary preparatory works are carried out. This may include fastener treatment, joint rectification, corrosion treatment, and surface preparation to ensure the roof is suitable for waterproofing application. -
Waterproofing System Application
Based on the roof condition and movement characteristics, an appropriate waterproofing system is applied. This may include liquid-applied membranes, PU coating systems, or joint-specific treatments, selected to accommodate roof movement and exposure while reducing the risk of recurring leaks. -
Detailing & Final Inspection
Critical detailing at joints, penetrations, and terminations is completed, followed by final inspection to ensure proper application before handover.
The solution leaves your area fully sealed and dry, providing lasting protection against leaks and daily moisture.
Long-Lasting Waterproofing for Your Metal Roof
Our metal roof waterproofing begins with a thorough inspection to identify all leak-prone areas, including panels, flashing, vents, and skylights. Using expert techniques tailored to the roof’s structure, we address leaks at the source and protect against rust and corrosion, ensuring it remains dry, secure, and reliable for years to come.
Certified and Experienced Applicators
All of our applicators are trained and experienced in handling metal roof waterproofing works.
Comprehensive Leak Resolution
We have complete solutions to tackle all types of water leakage on metal roofs, serving industrial, commercial, and residential buildings with lasting results.
Lab-Tested and Certified Materials
We use materials that have been tested and certified to meet relevant performance and quality standards.
Green Label Products
We use low-VOC, environmentally responsible products to support safer indoor and surrounding environments.
Up to 5 years Warranty for a Piece of Mind
Our long-term warranty covers all metal roof waterproofing work, giving you confidence in durability and reliability of ARCHTECH’s leak-proof solution.
Our Past Projects
ARCHTECH Waterproofing has been trusted across nation wide, from hospitality developments and government facilities to large-scale engineering works and premium residential properties. Our solutions are engineered for long-term performance, backed by technical expertise at every stage of the project.
Can’t Describe the Leak? Just Show Us.
Send a photo or video of your leak, and let our waterproofing specialist assess the situation so you don’t spend on wrong repairs.
Metal Roof Leaking? We’ve Got You Covered.
Tell us what you’re facing, whether it’s a leak, damp smell, mould stain or bubbling paint. Our team will review your case and get back to you with a personalised solution and quotation.
Explore Our Comprehensive Range of Waterproofing Solutions for Other Areas
Discover how we protect every area of your property.