Don't wait for the leaks! Discover 7 critical metal roof checkpoints to inspect before the rainy season to protect your home and save on repairs
The rainy season in Vietnam has always been a "nightmare" for buildings with degraded metal roofing systems. Dripping leaks, yellow stains on gypsum ceilings, or more seriously, electrical short circuits due to water infiltration all stem from neglecting roof maintenance. "Prevention is better than cure" – inspecting your metal roof before the first rains arrive not only ensures a peaceful night's sleep but also saves you thousands of dollars in overhaul costs.
1. The Screw System & Rubber Washers
This is the most common cause of leaks (accounting for 70%). Over time, under the influence of high temperatures, rubber washers age and crack, or screws become rusted and loose due to wind and storms.
2. Overlaps & Seams
The junction points between two metal sheets are extremely sensitive. If the initial construction did not provide enough overlap or if the ribs are dented, water can be "sucked" backward during heavy winds.
3. Gutters & Downspouts
Gutters clogged with leaves, debris, or mud will prevent water from draining quickly, causing it to overflow back onto the purlins.
4. Wall Flashing & Expansion Jo
[English] Where the metal roof meets an adjacent wall, it is usually treated with mortar or flashing. This is the most prone area for cracking due to uneven shrinkage between two building structures.
5. Corrosion & Pinholes
Poor quality or aged metal sheets will develop rust spots. Although these pinholes are small, during heavy rain, pressure will force water to stream into the house continuously.
6. Purlins & Roof Trusses
Don't just look from above; inspect from below. Sagging or rusted purlins will compromise the roof's stability, making it susceptible to being blown off during storms.
7. Roof-mounted Equipment
Water tanks, solar heaters, AC outdoor units... if their bases are not properly reinforced, they can deform the metal sheets or cause leaks at the support points.
Inspecting these 7 critical checkpoints doesn't take much time but ensures absolute safety for your family. If you lack safety equipment or technical skills, do not hesitate to contact professional maintenance services.
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