@Max41 It's England and we are not very lucky in the climate department Its very rare when we have a couple of days together without rain Also the building are mainly listed ancient monuments and thats the way they built them in those days Its a "period thing" i think
@lexiconic That is nice it is a period thing , which is also earlier method to save buildings . It is good if there rains much , if it helps to the agriculture in the nearby places . There are not many rivers in england to cater to the huge population .
