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Effective ways of waterproofing corrugated iron roofs

How to roof waterproof corrugated iron is a matter of both technology Technicians and project owners are very interested. When roofing a project that uses corrugated iron as a construction material, in addition to the beautiful and safe work, the technicians must also ensure that the roof is technically correct, that the roof is not permeable or leaking inside. The following article will help all of you get the most general knowledge about waterproof corrugated iron roofing.

Causes of seepage and leak in corrugated iron

In order to have the right roofing methods, first, we need to know the causes of seepage and leak to avoid the wrong ways. If the building leaks, the life of the building will be greatly reduced. From there, the building will quickly degrade and cost you a lot of money. Let’s take a look at some of the causes of leaky roofs right below.

  • Because the technical staff is not careful during the construction process, causing the corrugated iron to be scratched, over time, the corrugated iron starts to rust and corrode, leading to water seepage inside.
  • Due to the construction owner choosing poor quality corrugated iron materials, cheap price, leading to poor construction quality and rapid deterioration.
  • The process of the corrugated iron roof coming into contact with rainwater at the roof screws also causes water to leak inside.
  • Due to improper installation by technicians, the corrugated iron is deviated from the purlin, or distorted, so water leaks inside.
  • Because the contacts between the corrugated iron roof and the nail have gaps, rainwater seeps into the house.

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The most effective waterproofing method

After knowing the causes, we need to find the best solutions to limit the risks. Let’s find out how to 100% waterproof corrugated iron roofing.

Construction of waterproofing corrugated iron roofing with glue

This option is the most popular option today because they are easy to implement and the price is extremely cheap. With this solution, you do not need to edit the design of the roof without having to cut, weld or remove the corrugated iron roof to fix it.

With only the use of specialized glues at supply stores, their prices are also quite cheap. The most commonly used glue by engineers is silicon glue. Using this glue, the problem of leakage for your project will be solved immediately.

You can use this glue right after the roof is finished or if the roof leaks, you can fix it when there is a problem.

The steps for this alternative are as follows:

Step 1: Clean the corrugated iron roof, especially the glued areas.

Step 2: Pump glue at locations where there are crevices that leak water into the house, if you cannot know all the gaps, you can use a pump to pump water to the roof and detect leaks.

Step 3: Create a trough for the corrugated iron roof so that the water can flow away by bending the part of the corrugated iron roof in contact with the wall.

Reference: Heat-proof solution for the attic

Waterproof corrugated iron roof using sika to waterproof the corrugated iron roof

This waterproofing material is very popular in civil and industrial applications. This product has the characteristics of high strength, outstanding adhesive ability. Can be used for all types of corrugated iron and concrete.

Using this product, you will not have to worry about the leakage and seepage of the corrugated iron roof. At the same time, the product has a very long life, so you will reduce a large part of maintenance and repair costs.

The steps to implement this solution are as follows:

Step 1: Find the locations most likely to leak.

Step 2: Clean the corrugated iron roof surface clean.

Step 3: Apply a waterproof layer to the corrugated iron surface.

Step 4: Apply glue for the first time on the waterproof layer.

Step 5: Stick the bearing net.

Step 6: Glue the second time and clean the work.

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Watch now: Croof roof is permission required

Waterproofing the corrugated iron roof with waterproof paint

Waterproof paint is a very effective way, the price is extremely cheap. This option has the advantage of good adhesion, helping to block heat for the corrugated iron roof and protect the corrugated iron surface. This way is also very quick with the following steps:

Step 1: Prepare paint and protective gear such as masks, gloves, clothes, …

Step 2: Apply paint to the surface that is likely to leak.


Above is the best waterproof corrugated iron roofing method that we have synthesized. We hope that you will find the most suitable solution for you.

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