I have got condensation on all of the outside windows and door

Surface condensation will appear on face 1 of the insulating glazing if the temperature on this face of the glazing is significantly lower than the external air temperature and if the dew point (i.e. temperature at which water vapour becomes liquid) of the external air is higher than the temperature of the glass. The surface temperature on the outside of glazing is dependent on: -The heat flow from the interior passing through the glass. This depends on the difference in temperature between the internal surface and the external surface of the glazing and the U-value of the glass -The heat exchange by convection with the external air -Heat loss by radiation mainly to the sky. Various studies and measurements carried out by the CSTC have shown that heat exchange by radiation is relatively limited in overcast weather. However, when the sky is clear at night, there are significant heat losses to the sky.