ᐅ Plaster the groove in the exterior wall for cables above the canopy.

Created on: 13 Jun 2022 22:55
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gebbesis
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gebbesis
13 Jun 2022 22:55
Hello,

about three years ago, the electrical system in our house was replaced by a company.

We recently noticed by chance that there is a gap above the canopy at the main entrance which has not been plastered. An electrical cable runs through this gap, supplying power to the lamp on the canopy.

The gap is not visible from the ground, which is why it went unnoticed.

How likely is it that moisture has already penetrated the masonry through this gap and possibly caused damage?

Is there anything special to consider when filling the gap because of the cable?

Should the cable be secured in any way?

Thank you very much for your support!

White, textured wall on a corner; a white cable comes out of a hole in the wall.


White, textured wall with a white cable coming out of a hole and hanging down.


Rough, white plastered wall; bottom right a pipe/cable conduit, next to it a small yellow leaf.


Close-up of a white, rough wall with a hole showing a visible pipe.


Top view of a concrete roof surface with black spots, moss, and a cable conduit at the edge.
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Gartenfreund
14 Jun 2022 06:37
I wouldn’t worry about moisture. Just seal it up with some mortar or quick-setting cement, and that’s it.

What I’m less comfortable with is the cable.

It’s probably an NYM cable, which as far as I know is not UV resistant, so it should be protected from sunlight with a conduit or something similar.
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gebbesis
14 Jun 2022 10:27
Thank you for the feedback!

I will insert the cable into a corrugated conduit (slitted) and secure it with cable ties (both heat- and UV-resistant).

I will then seal the hole with fast-setting cement.
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Gartenfreund
16 Jun 2022 05:58
If there is still paint left, you can of course apply it over the mortar.

I cannot say whether the corrugated tubing is UV resistant.

From my experience, cable ties are generally not weather resistant. At least the ones I have here break after a few years. However, there are better quality ones available. Make sure to check when purchasing.
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gebbesis
22 Jun 2022 10:52
Thank you for your feedback.

I have now sealed the slot with rapid-setting cement. Unfortunately, I bought the corrugated conduit with a slightly too small diameter, so I will need to replace it. It is heat-resistant, UV-resistant, and suitable for operating temperatures from -40°C to 130°C ( -40°F to 266°F).

The cable tie is UV-resistant and weatherproof for 10 years.

Neither will probably last forever, but they should be fine for the next few years.

Do I need to worry about the cold? The cable is still more or less exposed outdoors.
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Gartenfreund
23 Jun 2022 05:44
Regarding the temperature, there is probably no need to worry, as it only goes down to the low double digits below zero.

You are right; such a thing is not designed to last forever.