Generally speaking, the winter temperatures are lower and the loft really doesn't need much ventilation. It is also advisable to shelter the loft from the north to prevent the wind from blowing directly into the loft. Do you want to cover up the loft?Is it necessary to block almost completely?
In fact, for fanciers in most places, it is not necessary to completely cover the loft and should not be completely covered. It's true that you don't need very good ventilation in winter, but that doesn't mean you don't need it. Ventilation still needs to be properly ventilated, otherwise the loft is not ventilated and the pigeons are prone to illness.
Recently, a pigeon fancier told us about this because the pigeon was sick and worried that the pigeon would be cold, so he covered the pigeon loft, and as a result, the pigeon died more severely, and there was a smell in the pigeon loft. So it's not advisable to do full occlusion, especially not all day.
Generally speaking, as long as the wind doesn't blow directly into the loft, it's not too much of a problem. At the same time, pay attention to increase the proportion of nutritious feed appropriately, so that your pigeons have enough energy to withstand the cold, and generally the pigeons will not have any problems.