Bought a hearthstone heritage in early December but had no hearth or chimney to connect it to. Built my own hearth with two layers of micore 300 and two layers of durarock(called for R1.2 I made it R2.72), behind it I installed 5/8" firecode sheetrock and durarock. as you can see in the before and after I still have some trim work and painting to finish but my slate work and stove installation is installed and working. I'll post some better quality pictures when it is all complete. Is it a bad thing to have it 76 in your house and be itching to throw more wood on?