ᐅ Temporary solution to drain water from a flat roof?

Under a flat roof, there is a small sign of water, but this occurs very rarely or only once so far, probably after/heavy rain.

The possibility of thorough renovation involves a very long waiting time.

The visible spot apparently indicates where water accumulates in the roof, likely the lowest point of the affected area.

Are there any experiences with the concept of temporarily draining the water from this spot (the puddle)?

Pictures?

Just because water is dripping at point A below doesn’t necessarily mean it is coming in directly above point A.

A garden hose can help with the investigation.

Otherwise, the concept of “removing standing water to prevent damage” makes sense. The exact implementation depends heavily on the specific situation.

I would rather stretch a roofing membrane with a slope over the entire roof. It will last a few weeks to months and is more reliable than just removing puddles as they form. By the time a puddle appears, several liters of water may have already entered the roof. What drains out below might not be the full amount; the entire insulation inside the roof could already be soaked and possibly developing mold.

Tolentino schrieb:

I would rather stretch a roofing membrane with a slope across the entire roof. It can last for a few weeks to months and is safer than just trying to remove puddles as they form. By the time a puddle appears, liters of water may have already penetrated the roof. What drips down below doesn’t have to be all of it; the entire roof insulation could already be soaked inside and possibly moldy.

I wasn’t referring to a puddle on the roof. But thanks anyway.

Molybdean schrieb:

Pictures?

Just because the water is dripping at point A below doesn’t necessarily mean it’s coming in directly above point A.

A garden hose can help with the search.

Otherwise, the concept of “removing standing water so it doesn’t cause damage” makes sense. The exact approach depends heavily on the situation.

I wasn’t referring to a puddle on the roof when I wrote that. I meant it clearly so there would be no misunderstanding. How is a garden hose supposed to help with locating the leak? I don’t want to find the hole in the waterproof membrane by pouring more water into the roof than it already contains. The waterproof layer will probably need to be replaced anyway. More importantly, I want to enable the roof, which is ventilated from the sides, to dry out over the hot summer, and to support this drying from below—now that I know where the puddle (the one not visible) is inside the roof (not on top of it). A garden hose could be useful for this purpose. But thanks anyway.

Sofie Flatroof schrieb:

I didn’t mean a puddle on the roof. When I wrote that, I meant it couldn’t be misunderstood.

Well,

At the moment, it’s not even clear whether the flat roof belongs to a house, a carport/garage, or a patio cover. Probably not a house, but that’s just a guess.

Repairing (not necessarily replacing entirely) the waterproof membrane is the only way to solve the problem. Everything else is just treating the symptoms. Ensuring there is no standing water anywhere on the roof is definitely advisable in any case.

And to provide useful advice, more information or clear photos would be needed.