Their manufacture was delayed due to the snow, which meant that they were not delivered in time to go into the bathroom pod during manufacture. Because the delivery of the bathroom pod could not be postponed (road closures were required in order to crane it into place), it was decided to leave the PVCu windows in the bathroom pod. Replacing the windows on site with the timber ones would have led to some very high embodied energy windows and potentially a worse seal around the windows.
The saga didn’t end there. When the windows arrived at site, five of the windows were not the right size and did not match the dimensions that had been sent to the manufacturer. These have now been re-made and will arrive on site next week.