I acquired two full sheets of insulation board .. 1200 x 2400 - sadly only 25mm thick but - not one to look a gift horse in the mouth and as Storm Dennis was a bit too menacing for any outside jobs I set to and cut the board for some insulation for my spare kit. I taped two or three pieces together to give me bith 50mm blocks and 75mm blocks.
Did a proper job this time and taped all the edges up to keep any critters out.
I usually have a super with at least 50mm of insulation board (Kingspan/Celpotex) etc on top of my hives above the crownboard. I sometimes find it a bit awkward getting the insulation out in order to look through the clear crownboards. I've tried bits of string looped through, things taped to the insulation but they always either cut through or the foil face pulls of the insulation so ..
This time .. I bored a recess into the insulation with a forstner bit, cut a piece of dowel to fit the recess and then drilled a couple of holes in the dowel and threaded a cable tie through it and up through the centre of the insulation board to form a loop.
I think this might work. I should just be able to pull the insulation out of the super using the loop of cable tie without it pulling through. Time will tell.
I've still one complete board left which is destined for a new solar wax melter as my old one is getting a bit weatherbeaten and the wall paper steamer did not do it a lot of good last year when there was not enough sun to melt the wax.