Re: Monitoring winter hivve temperatures #6027 by nealh 23 Mar 2020, 09:10 Mine have new homemade nice looking polycarb CB's on with a deep 45 mm insert space for insulation of which I use a 40mm thick insulation board with foil the edges are parcel taped to keep them from breaking up. Username nealh Rank NewBee Posts 188 Joined 19 Aug 2018, 08:29 Location West Sussex