Hi Kane
I use the same stuff ... its taking over man
It's a Reflective Insulation Called " Thermawrap " ...Its used to Insulate lofts and buildings, Its 600mm X 7.5 m on a roll and cheap
I seen it as a cheaper alretnative to other stuff thats used and it comes with a very good safety rating , CFC free and heat resistent Thermal Resistance up to 1.033m²/kW ...and as i said it was cheap and very reflective.... Take a look for yourself
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http://www.screwfix.com/prods/29949/...n-600mm-x-7-5m
I was on a tight budget building my room ...seen it and thought i would just give it a try ... Im noticeing that more and more people are switching to it or useing it