LuckyDuke
2019-04-08 20:34:25
- #1
Hello dear forum members,
today I took a closer look at the drainage work on our construction site and became somewhat skeptical.
Until now, I thought that the drainage pipe must be surrounded all around by gravel, which in turn must be enclosed by a fleece. On our construction site, the drainage pipe was indeed laid on gravel, but the fleece was only laid on top. Furthermore, the amount of gravel used seems very small to me.
We have a clayey soil, which is why I actually thought that significantly more gravel had to be filled in. Moreover, clay soil is known to be difficult to compact or not compactable at all, so you actually shouldn’t use it for backfilling, right?
So the fleece is just unrolled directly from the roll and laid only on top of the gravel and was nailed to the dimpled membrane (which has a fleece on it from the factory). As I said, I thought the fleece must completely enclose the gravel and the pipe like a kind of sack.
Thank you and regards

today I took a closer look at the drainage work on our construction site and became somewhat skeptical.
Until now, I thought that the drainage pipe must be surrounded all around by gravel, which in turn must be enclosed by a fleece. On our construction site, the drainage pipe was indeed laid on gravel, but the fleece was only laid on top. Furthermore, the amount of gravel used seems very small to me.
We have a clayey soil, which is why I actually thought that significantly more gravel had to be filled in. Moreover, clay soil is known to be difficult to compact or not compactable at all, so you actually shouldn’t use it for backfilling, right?
So the fleece is just unrolled directly from the roll and laid only on top of the gravel and was nailed to the dimpled membrane (which has a fleece on it from the factory). As I said, I thought the fleece must completely enclose the gravel and the pipe like a kind of sack.
Thank you and regards