Properly installing the dimple membrane, base sealing, drainage?

  • Erstellt am 2018-11-24 01:10:17

zizzi

2018-11-24 01:10:17
  • #1
Hello everyone,

We have a bungalow with the following wall construction:
1. Sand-lime brick, bitumen coating, rigid foam in the base, window and door areas, otherwise mineral wool
2. Air layer
3. Facing brick with double bitumen membrane in the base area.

No basement, rainwater must infiltrate on the property (soil sandy).
The dimple membrane is supposed to protect the house wall against moisture (from the ground) (I am foregoing a gravel bed, since the bungalow has a 50 cm roof overhang).











How can this dimple membrane be correctly installed?
Which way around?
Is drainage necessary? Gravel below or above the drainage? What happens with the beginning and end of the drainage? Connected to rainwater pipe or ...?
Fleece?

How is it done with you? (maybe a sketch?)

Many greetings
 

Nordlys

2018-11-24 12:31:49
  • #2
1) I don’t know exactly. 2) Drainage yes. 3) It forms a ring with a flushing shaft, from which a pipe goes to the rainwater sewer. 4) Fleece yes. Gravel above and below the drainage, then fleece on top, then pebbles.
 

ypg

2018-11-24 18:37:24
  • #3


It does not. A dimpled membrane is only intended to protect the insulation from mechanical influences. It is not a protection against moisture. And an overhanging roof has little to do with the damp soil around the house. Laugh, then you would only need a splash guard on the west side. The splash guard is a kind of drainage so that the moisture in the soil (not rain) can better seep into the ground at the house. Although the moisture in the soil depends on the rain, it also depends on other factors.
 

zizzi

2018-11-24 23:02:56
  • #4
Dimple board, drainage and splash protection are the measures that protect the foundation and masonry against water and moisture. They should be selected and combined depending on the situation. Just google "How are buildings protected against groundwater and layer water?"

There you can see, for example, "Drainage connection - not allowed if the cellar is located in the area of a groundwater conductor."

Here, the groundwater is not high, the soil is sandy and water-permeable. The excavation for the foundation was much larger than the foundation itself, the house has no cellar and is properly sealed.

At the moment I do not know what makes the most sense for our situation. In our settlement, I don't see a single splash protection, but there is dimple board. But just because others do something doesn't necessarily mean it is right.
 

ypg

2018-11-24 23:29:13
  • #5


Yes, that's how it's done. Everything is good and okay. But a dimpled membrane is only for mechanical effects and could even be omitted.
 

zizzi

2018-11-25 09:46:57
  • #6

Yeah, I understood
 

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