Hi
i don’t know anything about scorpion set ups however Tyvek roofing membrane causes huge issues for bats when it is used in roof spaces as bats crawl around and their claws fluff up the membrane until it gets to a point where they get tangled up and basically starve as they are unable to free Themselves (it is also supposed to be breathable so the moisture will go out and stop the roof space becoming damp which works until it gets dirty, the pores clog and then it stops working resulting in a non breathable membrane)

I don’t know if the fact it is compromised of long fibres that come loose and tangle would pose an issue for the scorpions but it may be worth keeping an eye on if they are regularly crawling over sections of it. I am only aware of its issues from a bat roost perspective where it Is devastasting.

 

That roofing membrane is now industry standard unfortunately. It's used to "seal" the roofspace for better insulation whilst being in theory breathable. I haven't used the old bitumen based roofing felt for over 30 years. It's unfortunate as I have seen first hand what both types do to animals that try to use our roof space.
It's probably been 100 years since no roof lining was the normal practice.

I've seen tyvek all fluffed up in the past so it's a good point.

 

I'm going to suggest that your set up is completely wrong.
The substrate is too shallow. They are a burrowing species, so should have a decent depth of substrate
It will also dry out very quickly.
Wood vivs do not last long when used to house species requiring a moist substrate and high humidity.
The thermometers you have are useless - if you look at them on the shelf, every single one will show a different temperature.
As a tropical species, they do also need warmth overnight.
Your photo label states that the bulb is LED and gives off no heat. So what is your heat source?
You need to, at the very least, replace the thermometers with digital ones, or better still get yourself an IR heat gun, and deepen the substrate to around 3 times the length of the scorpions.
They need an air temperature of around 28C. Hoe are you providing heat?

 

They are juveniles, approx 1.5 inches body length..substrate is 3 inches front end and about 5 at the back. I could build it up higher.
I use an IR heat gun. Those are substrate surface temperatures during the day.
Heat source is a ceramic heater during the day on thermostat as I stated in the post.
The lamp is just to give a day/night cycle, not for heat.

I have been turning off the heat and light overnight. The temperature drops to about 22 degrees.

 

I would leave the ceramic on 24 hours a day. These are a tropical species that would experience warm days and nights.
One suggestion - take the scorpions out and put them in something temporary.
Get some aquarium grade silicone sealant to seal all the joints in the viv. Once dried and the odour has gone, you will have a much better, longer lasting wood enclosure.
Even better will be sheets of perspex fixed to the inside surfaces and again, the joints sealed. This will give a water proof, and well insulated, viv that will be energy efficient and water proof.

 

Ive just purchased a second hand exo tera glass enclosure.
It's 45 x 45 x 45 in size.
How should I go about setting this up, What heating method should I use.

Thanks

 

Use what you already had, a ceramic heater.
Deep and moist substrate, happy days.

 

I am going to have to mount it inside though right? Not like the exo terra one that sits on top ?
Or will something mounted on top give enough heat.
Can you link me to something that would work.
The old viv has a ceramic plate screwed to the top of the wood inside. Could I reuse that?

 

Use an exo terra dome holder. Raise it slightly above the top of the tank. Cover the rest of the lid with perspex to prevent loss of humidity.