Sonnengarten
2017-09-25 15:22:25
- #1
Hello everyone,
we are currently still in the construction phase and have repeatedly noticed that water has entered below the window sill of two basement windows. Sometimes so much that the water ran down the wall to the floor or it was at least wet directly below the window sill. The shaft and the windows are not designed to be pressure-waterproof.
We have never been able to directly identify the cause so far, but we suspect that during rain water collects in the light well in front of the window, cannot drain sufficiently, and has therefore flowed into the basement room from window height. It is also possible that it flows in over the side into the light well...
We have addressed the site manager several times about this, who only said it will be resolved by handover. As a first step, the drainage of the light well has now been cleaned because it was apparently clogged with construction materials. In addition, a glass pane is now to be installed over the light wells to keep rainwater out from above. The groundwater stands about 30cm high at the basement.
The question, of course, is whether this is a suitable solution or just treating the symptom? To simulate this, we now want to pour 1-2 buckets of water into the shaft to see how quickly or slowly it drains...
How much water should the light well be able to drain and in what time, and is the idea of the glass pane a proper solution?
Would a backflow valve in the light well make sense, which also filters dirt?
Pictures 1 and 2 show the water flow quite well, picture 3 shows the shaft from the outside.
Thanks in advance for your feedback!

we are currently still in the construction phase and have repeatedly noticed that water has entered below the window sill of two basement windows. Sometimes so much that the water ran down the wall to the floor or it was at least wet directly below the window sill. The shaft and the windows are not designed to be pressure-waterproof.
We have never been able to directly identify the cause so far, but we suspect that during rain water collects in the light well in front of the window, cannot drain sufficiently, and has therefore flowed into the basement room from window height. It is also possible that it flows in over the side into the light well...
We have addressed the site manager several times about this, who only said it will be resolved by handover. As a first step, the drainage of the light well has now been cleaned because it was apparently clogged with construction materials. In addition, a glass pane is now to be installed over the light wells to keep rainwater out from above. The groundwater stands about 30cm high at the basement.
The question, of course, is whether this is a suitable solution or just treating the symptom? To simulate this, we now want to pour 1-2 buckets of water into the shaft to see how quickly or slowly it drains...
How much water should the light well be able to drain and in what time, and is the idea of the glass pane a proper solution?
Would a backflow valve in the light well make sense, which also filters dirt?
Pictures 1 and 2 show the water flow quite well, picture 3 shows the shaft from the outside.
Thanks in advance for your feedback!