Hello, I have a new building with
Panel type: RW roof panel, 1000 mm (39.4 inches)
Core: IPN1, 160 mm (6.3 inches)
Profiling: T-trapezoidal profile RW / Q-Monobox
Kingspan
Exterior: 0.50 mm (0.02 inches), polyester 25µm, SP,
RAL 7016, anthracite
Interior: 0.40 mm (0.016 inches), polyester 15µm, PEI,
DU, RAL 9002 grey white
installed.
The substructure consists of load-bearing beams with a 6x6 cm (2.4x2.4 inches) frame spaced at 50 cm (20 inches).
The thermal stress on the panels is so high that when the weather changes from sun to clouds, cracking noises occur.
Beforehand, I spoke with an architect from Oldenburg who built a residential house using these panels.
Unfortunately, she did not mention the issue with the cracking noises. In hindsight, she admitted that she also experiences these noises.
Cause:
Because a sandwich panel, besides length changes, behaves like a bi-metal and additionally bends convexly when heated from outside, there are extra stresses on the substructure caused by twisting of the purlins and rails and additionally lifting forces on the middle supports of the purlins or rails.
Now the question is, how can this problem be solved?
A new roof... that will be expensive.
Inquiry at Kingspan: The screws are to blame! When expanding, the metal jumps over the threads of the screws.
Screw manufacturer (Ejot): Nonsense, the screws are not to blame, this is a construction-related problem of the panel in connection with the timber substructure.
Does anyone have a solution?
Panel type: RW roof panel, 1000 mm (39.4 inches)
Core: IPN1, 160 mm (6.3 inches)
Profiling: T-trapezoidal profile RW / Q-Monobox
Kingspan
Exterior: 0.50 mm (0.02 inches), polyester 25µm, SP,
RAL 7016, anthracite
Interior: 0.40 mm (0.016 inches), polyester 15µm, PEI,
DU, RAL 9002 grey white
installed.
The substructure consists of load-bearing beams with a 6x6 cm (2.4x2.4 inches) frame spaced at 50 cm (20 inches).
The thermal stress on the panels is so high that when the weather changes from sun to clouds, cracking noises occur.
Beforehand, I spoke with an architect from Oldenburg who built a residential house using these panels.
Unfortunately, she did not mention the issue with the cracking noises. In hindsight, she admitted that she also experiences these noises.
Cause:
Because a sandwich panel, besides length changes, behaves like a bi-metal and additionally bends convexly when heated from outside, there are extra stresses on the substructure caused by twisting of the purlins and rails and additionally lifting forces on the middle supports of the purlins or rails.
Now the question is, how can this problem be solved?
A new roof... that will be expensive.
Inquiry at Kingspan: The screws are to blame! When expanding, the metal jumps over the threads of the screws.
Screw manufacturer (Ejot): Nonsense, the screws are not to blame, this is a construction-related problem of the panel in connection with the timber substructure.
Does anyone have a solution?
Hello,
unfortunately, we also have the problem of the roof making banging noises due to thermal changes. The roof elements are from Unidek. According to the carpenter, the substructure is fine. We will now try the suggestion with ventilation tiles. Possibly, hot air is circulating between the tiles and the insulation board. At the moment, we don’t know any more.
unfortunately, we also have the problem of the roof making banging noises due to thermal changes. The roof elements are from Unidek. According to the carpenter, the substructure is fine. We will now try the suggestion with ventilation tiles. Possibly, hot air is circulating between the tiles and the insulation board. At the moment, we don’t know any more.
r4id-91 schrieb:
Hello,
@Rubin21 were you able to solve the problem or are there any new insights?
Can thermal expansion be minimized with a photovoltaic system? Hello,
The current situation is that the cracking noises have almost disappeared.
The wood in the substructure seems to have completely dried out.
Additionally, we installed a substructure ceiling facing the living area.
It is still unclear what is cause and what is effect here.
A photovoltaic system is also planned but has not been installed yet. It was our last option to reduce the problem.
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