Hello!
I’m interested in your opinion again.
In about one week, the screed will be poured (plumbers and electricians are currently busy). Now the following issue has come up:
- We don’t have a horizontal damp proof membrane on the slab (no basement) and the screed installer has pointed out that this apparently does not comply with the standards.
- We don’t have a horizontal damp proof membrane because the builder said it wasn’t necessary since we have a 40 cm (16 inches) capillary-breaking layer (Geocell foam glass gravel). This was also recorded in the contract protocol and the construction meeting minutes.
- The architect also confirmed the non-necessity with a building physics calculation, which is documented in the construction meeting minutes.
=> Our concern now is what, for example, the insurance company would say in case of a pipe leak. Could they refer to the standard and possibly reduce the payout in case of damage, even though the non-necessity was confirmed by our professionals?
Here is the structure again (as mentioned, no basement, so directly on the ground):
200 mm (8 inches) gravel
400 mm (16 inches) foam glass gravel (capillary-breaking)
200 mm (8 inches) concrete
110 mm (4.3 inches) EPS granulate
70 mm (2.75 inches) cement screed
10 mm (0.4 inches) tiles
What do you think? Should we definitely add a damp proof membrane?
Best regards
Jochen
I’m interested in your opinion again.
In about one week, the screed will be poured (plumbers and electricians are currently busy). Now the following issue has come up:
- We don’t have a horizontal damp proof membrane on the slab (no basement) and the screed installer has pointed out that this apparently does not comply with the standards.
- We don’t have a horizontal damp proof membrane because the builder said it wasn’t necessary since we have a 40 cm (16 inches) capillary-breaking layer (Geocell foam glass gravel). This was also recorded in the contract protocol and the construction meeting minutes.
- The architect also confirmed the non-necessity with a building physics calculation, which is documented in the construction meeting minutes.
=> Our concern now is what, for example, the insurance company would say in case of a pipe leak. Could they refer to the standard and possibly reduce the payout in case of damage, even though the non-necessity was confirmed by our professionals?
Here is the structure again (as mentioned, no basement, so directly on the ground):
200 mm (8 inches) gravel
400 mm (16 inches) foam glass gravel (capillary-breaking)
200 mm (8 inches) concrete
110 mm (4.3 inches) EPS granulate
70 mm (2.75 inches) cement screed
10 mm (0.4 inches) tiles
What do you think? Should we definitely add a damp proof membrane?
Best regards
Jochen
So, this is how it was done here. Concrete slab. On top of that, a bitumen membrane welded on with a gas torch. Then the cables and pipes. On top of that, insulation made from a type of expanded polystyrene, but significantly more compression-resistant. Over that, a foil, and on the foil, the heating pipes. Then the screed. The screed is separated from the walls by a blue foam strip. In the bathrooms, a waterproofing coating is applied on the screed. In the other rooms, a leveling compound is used—something from Mapei, as indicated on the bags. On top of that, either tiles or vinyl flooring; for vinyl, a kind of primer is applied in between, also from Mapei.
This construction method is actually standard here, although the material manufacturers are not always the same. Karsten
This construction method is actually standard here, although the material manufacturers are not always the same. Karsten
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