Gas Fire back panel

The laminate back panels cost more than 25. But could a piece of the thermal plasterboard do? Its the stuff with a silver paper covering on one side.
This idea occurs to me because it would be easier to fix ceramic tiles to.
Thanks for any advice.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.