In the market there are many types of roofs or covers to place in your house, but if you have already chosen the sheet metal roof, now it is necessary to choose which of all the presentations is the best; in reality they are the same material, some have acoustic properties, but the biggest difference has to do with the type of fold, for example, in this case it has a grooved fold and in this one a trapezoidal fold.

But from my experience I tell you that one of these two types of folds are very likely to generate leaks in the ceilings and therefore headaches; In general, people place two types of sheets, corrugated and trapezoidal, on their roofs, the only difference between one and the other being the type of folding and of course the color in some cases.

The folding of these types of sheet metal has a reason, thanks to its folding it gives it more rigidity than if it were a smooth sheet metal, it not only supports its own weight but also a person walking on top, either for maintenance or repair; in addition to the most important thing is that it channel the humidity to a specific point for its eviction.

Another important point is how the sheet metal is fixed to the ceiling, normally it is done with screws that have a self-tightening tip, the important difference between these screws is the washer that they have underneath, in some cases it is absolutely rubber and in the other case it is Sheet metal with glued rubber.

When the installer exceeds the tightening it can happen that the rubber alone deforms and bursts in some way, if this happens that point is no longer hermetic, understand that you are making holes in your ceiling, but it is necessary to fix it; while the sheet metal washer protects the rubber one below, it will conform to the crest of the slingshot washer, it will conform without breaking, so you have to understand that every time the sheet metal is perforated there is a filtration problem , then if it is not hermetic this is before a humidity problem .

In that dent it is more likely that it joined the water, there is more possibility of it passing into the water if that roof does not have a good slope, we are promoting many points for a leak to occur.

In this graph we see the two types of bending, one that corresponds to the bending that has to do with the trapezoidal sheet and others with the corrugated sheet, we imagine that it is pressed when placing a screw if the same force is applied to the trapezoidal sheet it will bending, this usually does not occur in most cases in the corrugated sheet, this means that obviously the corrugated sheet is much more resistant to pressure or poor execution in the installation of a roof.

As you may have seen, these simple tips can help you, and I assure you that they will save you more than one headache.

I hope the information is useful when making a decision, do not forget to support me and we will read next time, bye.

All images including schematics, photos and models are mine