Sealing corrugated roof?

[Bluemonster107]

i have 4 plastic corrugated roof panels, overlapping one another and seams sealed with silicone. Well... I thought sealed... we had some good rain and there are some drips
So apparently the silicone didn’t seal all seams well (only ran silicone on top overlap layer/in between).
My question is.. what did I miss? What is the best way to seal this type of roof? (Picture is just to show the material used)

 

[Ridgerunner]

What kind of slope did you put on the roof? A flat roof will hold water and it will leak. If you have a decent slope and did overlap the water should run off.

 

[Bluemonster107]

@Ridgerunner ... the roof slopes 2” , but because of how I had to instal the panels.. the water doesn't run along the ridges... it basically has to go over them. I know not correct but figure if I sealed it, it wouldn’t be an issue... ha! I was wrong.
I guess I could try and slope the roof so water can flow down the ridges... it’s just the ground doesn’t slope that way so may have to make a bit taller slope?

 

[Ridgerunner]

Is that 2" per foot or 2" total? The amount of required slope depends some on how tall your corrugations are, the manufacturer should have recommendations, probably online. A "standard" recommendation is 3" per foot pitch or slope, but if the ridges are a bit higher than standard 2" could be enough.

But, yeah, it needs to slope the right way.

 

[Bluemonster107]

@Ridgerunner ... it’s just lifted 2” on one side.. it was really just intended to keep leaves off , as it doesn’t rain mutch here in California... well... it USUALLY.. doesn’t. Ha
I will just change the slope to the other direction and slap some flex seal on it ... the enclosure is under an arbor so I’m limited on how high able to get slope

 

[aart]

the water doesn't run along the ridges... it basically has to go over them. I know not correct but figure if I sealed it, it wouldn’t be an issue... ha! I was wrong.
I guess I could try and slope the roof so water can flow down the ridges.

It would work much better that way.