Heating issues

[CALM Pythons]

So I'm having some heating issues-
I'm currently using a infrared bulb inside a cage inside the vivarium, which is doing the job fine, but not really creating enough heat on the substrate under the hide.
I'm worried about using a heat panel as, having a wooden vivarium, I would need to place it inside, and I wouldn't want to risk any burns, due to thermal blocking and that stuff.
Basically, using a wooden vivarium, what is the best way to get heating? Is it to have a heat mat covered by paper and then substrate?

Never use a Heat mat inside under substrate and you cant use a UTH with Wooden Viv. Use a RHP and call Bob at Pro Products. Tell him the dimensions and he will tell you what size you need. He not only is the best RHP manufacturer in the business, he is a Keeper too.
http://pro-products.com/contact/
$80-$130 depending on Size shipped.