A couple of weekends ago a lot of rain fell on the Saturday during the day. On the Sunday, we noticed that water had dripped into each of the three fireplaces. Not down the internal metal flue, but down the chimney. And into all three fireplaces.
The only place where rain could get in is down the side of the new chimney pots. These were put only a couple of months ago. We took a look at the pots today. The sand and cement around the pots has cracked and is letting in water. There are cracks in the mortar around all three pots.
Guess where the water is coming in?
It is pretty obvious what the problem is!