Zoomx i plan to mount the temperature sensor on my patio which is covered by my roof so i shouldnt need this radiation shield correct?
It depends from winds and from the amount of infrared radiation coming from your house and near buildings.
Without wind for sure it will get infrared radiation from your house.
I live in a city among buildings and some sensor, during the day, get radiation from building at about 30-40m. No building around it's better. The WMO rules requires no building at all around, don't remember the distance.
So it depends from the accuracy you want. Some time ago I found a document from the meteorological service of Canada with stations classification based on site environment (buildings distance and other factors) but I don't remembre it's title.