ᐅ Replacing surface-mounted water pipes

Created on: 21 Jan 2023 07:37
K
Kiefernadel
Good morning everyone,

My husband and I were recently chatting and – just hypothetically – wondered if it would be possible to renew all the water and wastewater pipes as surface-mounted installations. So, the old pipes would be disconnected in the basement but would otherwise remain inside the walls throughout the house, while the new pipes would simply be installed on top and then covered. Is this feasible?

Disadvantages:
- The room would not be fully utilized and would become smaller
- For the next generation, it would probably mean double the work...

Advantages:
- Less mess
- Cheaper
- Faster

We would really appreciate your thoughts on this.

Best regards
K
karl.jonas
21 Jan 2023 15:34
Are your considerations still valid if you decide to cover the entire wall instead?
Kiefernadel schrieb:

Advantages:
- less mess
- cheaper
- faster

A few slots can be quickly cut and plastered again. Sure, that creates some mess, but obviously you don’t live there yet, and a thorough cleaning is necessary before moving in anyway. And I’m surprised that it should be cheaper to mill two slots instead of covering an entire wall.
K
Kiefernadel
21 Jan 2023 15:52
karl.jonas schrieb:

And that it should be cheaper to mill two slots instead of cladding a wall surprises me.

Well, I’m not just talking about milling two slots. That’s why I started this topic here. We’re beginners and basically still have very little knowledge.

But it is often said that renovation involves considerable effort and costs for demolition, debris removal... especially compared to new construction. However, if you consider the existing old wall as the “structural wall,” then all that demolition work would be eliminated...

Maybe especially if you’re thinking about interior insulation. Before we actually pursue this idea, we’ll talk to a professional. But maybe the idea will fall apart here because we’re overlooking something obvious...
B
Buschreiter
21 Jan 2023 17:08
We also installed the new lines surface-mounted and then covered them with drywall partitions. If done well, even very heavy tiles measuring 100cm by 30cm (39 inches by 12 inches) will hold on them. In our bathroom, I don’t consider the loss of space to be significant. We built the walls up to a height of 1.25m (4 feet) to provide a practical shelf.
K
KarstenausNRW
23 Jan 2023 10:48
Kiefernadel schrieb:

Disadvantages:
- the space is not fully utilized and becomes smaller
- for the next generation, it will probably mean double the work...

Advantages:
- less dirt
- cheaper
- faster

Is that really the case? Is it cheaper to hide the new pipes behind a drywall cavity wall—what does that actually cost and how complex is it? The pipes still have to pass through walls and ceilings somehow when they are being replaced. Have you ever done drywall joint compound and sanding?

I have done several renovations, but generally replacing all pipes on the surface and hiding them behind a drywall cavity wall makes no sense.
T
Tassimat
23 Jan 2023 10:57
I would always choose flush-mounted installation if it is even remotely possible. Loss of space, boxed-in sections, ruined aesthetics... there are many reasons against surface-mounted solutions, but none in favor.
Buschreiter schrieb:

We built the walls up to 1.25cm (0.5 inches) high to create a practical shelf.
My walls are deliberately without a ledge to avoid storing any clutter and to simplify cleaning. They are tiled halfway up, painted on top, but finished flush. There is no dust edge.
K
Kiefernadel
23 Jan 2023 11:41
KarstenausNRW schrieb:

Is that really the case? Is it cheaper to hide the new pipes behind a drywall cladding – what does that cost and how complex is it? The pipes also have to go through walls and ceilings somehow if they are being replaced. Have you ever done drywall taping and sanding?

I've done several renovations, but generally hiding all new pipes on the surface and behind a drywall cladding is nonsense.
Yes, I’ve done it several times, but never got paid. That’s why I asked if what we are assuming makes sense or not.

I found it definitely less work to install the pipes behind a cladding than to expose the pipes and then tape, sand, and apply plaster afterward – plastering is required in both cases anyway. But I have no idea how it works for an entire house, let alone the costs. I was always just a helper.