Well I was. The whole house glows
Back to the beehives.
The first two pictures are a Paynes and a Swienty, both poly, of course.
I have deep 25mm PIR roofs on these which I removed. The shallow under the pains has a hot spot but this is due to heating up in the sunshine.
As I expected, there is no apparent heat loss through the walls. There are a couple of spots on the brood boxes but they disappeared when I held the camera at a slightly different angle so I'm not convinced this is showing where the cluster is.
There is some heat loss from the side of the crown board. Both are wood framed polycarbonate topped with 50mm PIR
The last picture is a snap I took from under the OMF of just one seam of bees
Tomorrow I'm going to pop over to the association apiary to take some snaps of their wood hives