Okay so there exists a product called reflectix. It looks like this :


It is a very useful thing which has literally 100's of applications. It is in essence bubble wrapped in foil insulation. But you can use it is a "cover" or a "lid" . this is what I have my pb in while waiting for my heat for rack I have. It's a 40 gallon breeder with a sliding lock top. It looks like this.


I keep tortoises as well in large enclosures which are large heat and humidity emitters. As a result the standing humidity is about 50% in my apt. So I don't need the cover for him but I initially invented this lid system for tortoises which require humidity into the 90's. When my pb started to shed a few days ago I added the panel's to the top of the cage.


In the first pic the humidity was around 62% you can see in about 5 minutes I've been typing it's up over 10% and rising. You can also build lids like this.


As I said before I keep tortoises in most of these so climbing escape is a non issue . however you could still build a frame, ( I use foil tape to tape the reflectix to metal screen door frames to make the tops less mailable so they can easily be added or removed over the existing screen lid. As you saw in the other picture you can also cut out holes for lights. Hope this helps


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