Hello,
we are building a house without a basement.
On the ground floor, we have a reinforced concrete slab, 25 cm (10 inches) thick. The masonry is complete, and the roof framework is currently being constructed.
Our builder wants to apply bituminous membranes onto the concrete slab before the electrician and HVAC technician lay their cables and pipes.
I have spoken with both, and the plan was for the electrician to install their wiring first, while the other service providers would follow and cut into the slab at the points where their lines cross, so the electrical cables would lie in a small recess. However, this process would damage the membrane, and the builder is strongly opposed to cutting into the slab.
His argument is that we have a total floor build-up of 20 cm (8 inches) where all the lines can fit without cutting into the concrete.
So, what is the best way to handle line crossings to avoid technical issues with any of the trades?
According to the installers, the procedure they propose is common practice.
Best regards,
André
we are building a house without a basement.
On the ground floor, we have a reinforced concrete slab, 25 cm (10 inches) thick. The masonry is complete, and the roof framework is currently being constructed.
Our builder wants to apply bituminous membranes onto the concrete slab before the electrician and HVAC technician lay their cables and pipes.
I have spoken with both, and the plan was for the electrician to install their wiring first, while the other service providers would follow and cut into the slab at the points where their lines cross, so the electrical cables would lie in a small recess. However, this process would damage the membrane, and the builder is strongly opposed to cutting into the slab.
His argument is that we have a total floor build-up of 20 cm (8 inches) where all the lines can fit without cutting into the concrete.
So, what is the best way to handle line crossings to avoid technical issues with any of the trades?
According to the installers, the procedure they propose is common practice.
Best regards,
André
K
knalltüte10 Apr 2021 20:33Chiseling out the floor slabs is definitely possible, but it’s not common practice. The concrete cover might no longer be sufficient in some areas, and depending on the depth of the grooves, the structural integrity could be at risk. Pipes and cables usually cross within the floor construction. Of course, not as often as you want but only as much as absolutely necessary, and you must also consider the maximum floor build-up height to ensure there is enough coverage of the underfloor heating with the screed.
I was initially against applying a fully laid waterproof membrane, but after hearing enough convincing arguments, we decided to install it accordingly. Please make sure not to damage it afterward, as otherwise, it simply doesn’t make sense.
I was initially against applying a fully laid waterproof membrane, but after hearing enough convincing arguments, we decided to install it accordingly. Please make sure not to damage it afterward, as otherwise, it simply doesn’t make sense.
superzapp schrieb:
Breaking up the concrete slab is definitely possible, but it’s not common practice. The concrete cover could then be partially compromised, and the structural integrity (depending on the depth of the channels) might be at risk. Pipes and cables usually cross within the floor structure. Of course, not more than absolutely necessary, and you also need to consider the maximum floor buildup thickness to ensure sufficient coverage of the underfloor heating with screed.
I was initially against using a fully applied waterproofing membrane, but after hearing enough arguments in favor, we ultimately decided to install it. Please don’t damage it afterward... otherwise, it doesn’t make sense. And what is the best way to manage crossings when the electrical cables are installed first? The heating engineer says he cannot run his pipes over other cables but wants to lay his pipes last.
aHOD_88 schrieb:
How should I best handle the intersections when the electrical cables are installed last? The heating installer says he can’t run his pipes over another line, but at the same time, he wants to install his pipes last. A question everyone planning to build without an architect should seriously consider.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
K
knalltüte10 Apr 2021 20:42aHOD_88 schrieb:
How should I best handle the intersections if the electrical cables are laid first? The heating installer says he can’t run his pipes over another cable but at the same time wants to install his lines last. Is this about heating pipes or more about wastewater pipes that have to be installed with a certain slope? In that case, it’s difficult if the electrician goes first. They should lay their pipes beforehand, at least that’s how it was done here. First the rough-in plumbing, then we do the electrical and controlled ventilation system. Or maybe the two trades should coordinate exactly where and how the pipes are installed? You have to agree on this, otherwise you won’t be able to get in there in 10 years 🙄
Why do the cables have to be laid on the floor at all? In our case, 98% of all wiring (IT, antenna, 230V or 400V, and KNX) was installed inside the walls and empty conduits were placed in the ceiling. Only for the ventilation system (planning error) were 3 to 4 cables run along the floor. I would not accept a larger number of cables being laid on the floor. I can only imagine that empty conduits were forgotten.
Similar topics