Heating Wooden Vivarium

[newbie101]

I have just purchased this vivarium:
http://www.reptilecentre.com/vivexot..._p23259529.htm

I was thinking of heating it via a Ceramic heat emitter 60watts (with thermostat) for the ambient temperature than a heat mat inside of the vivarium, I was then going to cover and seal the heat mat with a ceramic tile.. so no water damage and then for substrate just use paper towels.. but then realised I have to put my thermostat probe on the heat mat and I am not sure how I would do this? and then cover it with a ceramic tile?

Any help or suggestions would be appreciated thank you