by loft hatch, I mean, of course, a small opening between the loft and the outside of the roof, covered with a removable (lifts out from the inside) wooden hatch cover, maybe not much more than 2'x18"
Hi Makfai.
Fascinating stuff. We're just back from visiting my nephew and his family in Margate, on the Kent coast. They've recently moved to a 3 storey turn-of-the-century Victorian terrace with this same system in the attic. I found the lead-lined trough, (underneath old scaffold boards...