Roof window in sandwich roof?

  • Erstellt am 2016-10-19 16:14:48

rabox

2016-10-19 16:14:48
  • #1
Hi Community,
I am a tenant of a single-family house in Portugal (floor area approx. 100m2) and since the roof is leaking, the landlord is currently installing a new roof. He also asked if I would like to have windows inside. That would definitely make sense, but I have concerns because the roof is designed as a "sandwich." Between two rather thin metal plates, a layer of insulating material is installed.

My consideration is that the outer layer of the roof will heat up a lot in summer, while the lower layer, which is insulated, will not. The roof will therefore warp due to the temperature difference between day/night or summer/winter. That could mean that any windows where they meet the roof might become leaky quite quickly.

The roofer says there is no problem, but I am very uncertain and prefer to get further opinions. What is your view? I look forward to your answers.

Best regards from Portugal!
Raphael
 

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