Opening the attic window to stick the antenna outside is not necessary anymore which is good since winter temperatures are approaching.
Here you see the antenna with a bunch of RG6/U coaxial cable (10 meters)
This is how I started
To make the antenna moisture proof a transparant box was glued over the element
Antennas on the roof. In front LNB for 10 GHz RX in the back the 23 cm biquad for TX
You can find the dimensions of the antenna in my blog article of September 2013.