ᐅ Ventilation bricks causing issues with photovoltaic systems – any experiences?
Created on: 21 Jun 2019 22:19
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Christian K.C
Christian K.21 Jun 2019 22:19Hello everyone,
We are currently building our house with a hipped roof and have now discovered that there might be issues with the photovoltaic system. We will have two vent pipes for the toilets, and the roof will also have two additional vents per side. However, the photovoltaic system takes up a lot of space, and I am looking for a solution and hope for your help.
We will be using vent pipe tiles and ventilation tiles. Under the photovoltaic system, we have 10cm (4 inches) of space, but from what I understand, the tiles are higher than that...
My questions:
1) Can the tiles be shortened? The installer said that if it’s a plastic pipe, it can simply be cut, and the photovoltaic system can be installed over it, so no rain will enter.
2) Could the ventilation (toilet and roof) be rerouted inside the roof so that it exits where we have more space (at the very top)?
3) Are there special flat tiles that we could use?
4) How would you solve this problem?
So long...
We are currently building our house with a hipped roof and have now discovered that there might be issues with the photovoltaic system. We will have two vent pipes for the toilets, and the roof will also have two additional vents per side. However, the photovoltaic system takes up a lot of space, and I am looking for a solution and hope for your help.
We will be using vent pipe tiles and ventilation tiles. Under the photovoltaic system, we have 10cm (4 inches) of space, but from what I understand, the tiles are higher than that...
My questions:
1) Can the tiles be shortened? The installer said that if it’s a plastic pipe, it can simply be cut, and the photovoltaic system can be installed over it, so no rain will enter.
2) Could the ventilation (toilet and roof) be rerouted inside the roof so that it exits where we have more space (at the very top)?
3) Are there special flat tiles that we could use?
4) How would you solve this problem?
So long...
I want to start by saying that I lack experience with pitched roofs.
However, based on my personal experience, ventilation openings of any kind, no matter how shallow or cleverly designed, have no place beneath photovoltaic panels. There are temperature differences, humidity levels, and condensation involved. You don’t want to deal with that.
Routing ventilation ducts should not be too challenging if there is enough space under the roof for the piping. Especially since the current design seems to be somewhat excessive when it comes to ventilation openings.
However, based on my personal experience, ventilation openings of any kind, no matter how shallow or cleverly designed, have no place beneath photovoltaic panels. There are temperature differences, humidity levels, and condensation involved. You don’t want to deal with that.
Routing ventilation ducts should not be too challenging if there is enough space under the roof for the piping. Especially since the current design seems to be somewhat excessive when it comes to ventilation openings.
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hampshire22 Jun 2019 08:00solar tiles... The installer should actually have a solution for "rerouting." What does he say?
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Christian K.22 Jun 2019 11:15Here is a graphic showing how it should look on the roof. The bottom side is a little over 9m (30 feet) wide and about 4.4m (14 feet) high. The modules are 2 x 1m (6.5 x 3.3 feet). In the worst case, four vents still need to be accommodated there.
I have taken away that nothing should be placed under the photovoltaic panels if possible. However, the ventilation could be positioned under the roof in the free spaces. So far, the drainage ventilation goes straight up. A small bend would be needed here. Is the roof ventilation free to position? If yes, then we should not have any problems. I just don’t know if the roof vent can be freely positioned.
The photovoltaic installer suggested shortening the vent and installing the panels over it. This does not seem like a good idea, so I will leave that to the installer’s expertise. I haven’t been able to ask a roofer yet, so I’m reaching out to you.
I looked into solar tiles briefly, and at least from my quick research, I’m not fully convinced. There is no established solution in Germany that achieves 9kWp–10kWp.
I have taken away that nothing should be placed under the photovoltaic panels if possible. However, the ventilation could be positioned under the roof in the free spaces. So far, the drainage ventilation goes straight up. A small bend would be needed here. Is the roof ventilation free to position? If yes, then we should not have any problems. I just don’t know if the roof vent can be freely positioned.
The photovoltaic installer suggested shortening the vent and installing the panels over it. This does not seem like a good idea, so I will leave that to the installer’s expertise. I haven’t been able to ask a roofer yet, so I’m reaching out to you.
I looked into solar tiles briefly, and at least from my quick research, I’m not fully convinced. There is no established solution in Germany that achieves 9kWp–10kWp.
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Christian K.23 Jun 2019 10:45Hmm, so how to proceed?
Okay, assuming I cut the ventilation pipe made of clay. Would there then be no issues with rain? Of course, the photovoltaic panels are installed above the pipe, which should protect it, but if there is heavy rainfall and water runs down the roof tiles, couldn’t some water enter the ventilation pipe? That might be problematic if the insulation in the roof or other areas becomes damp.
Okay, assuming I cut the ventilation pipe made of clay. Would there then be no issues with rain? Of course, the photovoltaic panels are installed above the pipe, which should protect it, but if there is heavy rainfall and water runs down the roof tiles, couldn’t some water enter the ventilation pipe? That might be problematic if the insulation in the roof or other areas becomes damp.
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