ᐅ Electrical cable fastening/nail driven through bitumen waterproofing membrane
Created on: 29 May 2016 04:32
X
xyztestuser
Hello, we are currently building a single-family house with two full stories and no basement. On the ground floor, the architect specified a bitumen membrane with a thickness of 0.5cm (0.2 inches), which has already been installed. This week, the electricians were on site and laid network cables, satellite cables, and some electrical wiring inside conduit pipes on the ground floor, directly on top of the bitumen membrane. These conduits were secured individually or bundled together with fastening tape. Nails were driven through the fastening tape and the bitumen membrane.
Now my question is: Is this allowed, and if not, where is this specified in the relevant standards or regulations? Under what conditions would such an installation be permitted? If the bitumen membrane is damaged, wouldn’t it have been better not to install it in the first place, or am I misunderstanding something?
A few more details: The concrete slab is 20cm (8 inches) thick, and beneath it is a gravel layer approximately 65cm (26 inches) thick.
Thank you for your answers.
Now my question is: Is this allowed, and if not, where is this specified in the relevant standards or regulations? Under what conditions would such an installation be permitted? If the bitumen membrane is damaged, wouldn’t it have been better not to install it in the first place, or am I misunderstanding something?
A few more details: The concrete slab is 20cm (8 inches) thick, and beneath it is a gravel layer approximately 65cm (26 inches) thick.
Thank you for your answers.
W
winnetou782 Oct 2017 07:08Is it really allowed to damage the bitumen membrane during installation?
Regards,
Daniel
Regards,
Daniel
W
winnetou782 Oct 2017 08:30Yes, glued or something similar,
It doesn’t really make any sense to damage the bitumen membrane.
How is this usually done elsewhere?
It doesn’t really make any sense to damage the bitumen membrane.
How is this usually done elsewhere?
I am a trained electrician and would have preferred to simply secure them with OBO anchors, but our engineer advised against it. As long as the bitumen membrane is not damaged, there is no need to worry about whether it is allowed or harmful.
We then stuck the pipes (including water pipes and supply/return lines for the heating circuit) to the bitumen membranes using strips of bitumen membrane. It was quite a bit of work, but it went well. I would do it the same way again.
We then stuck the pipes (including water pipes and supply/return lines for the heating circuit) to the bitumen membranes using strips of bitumen membrane. It was quite a bit of work, but it went well. I would do it the same way again.
W
winnetou782 Oct 2017 09:35So, should one not do it?
Maybe a few points to consider:
- Nail holes can be sealed again with bitumen mastic.
- Is a bitumen membrane really necessary for a waterproof concrete slab?
Nowadays, many slabs are poured using waterproof concrete, so the bitumen membrane is often applied just because "that's how it's always been done."
Even in waterproof basements, it is laid down, but what is its actual benefit there?
- Nail holes can be sealed again with bitumen mastic.
- Is a bitumen membrane really necessary for a waterproof concrete slab?
Nowadays, many slabs are poured using waterproof concrete, so the bitumen membrane is often applied just because "that's how it's always been done."
Even in waterproof basements, it is laid down, but what is its actual benefit there?