Chimney sweep/co-worker is building a hearth . . . needs a listing of R values with various materials.
My only problem is I've found three separate sources -- The Chimney Sweep's page and two hearth articles all of which have great looking lists, but some of the R values vary when you compare the proverbial apples to apples (i.e. 1/2 inch of Wonderboard).
Specifically the sweep says he needs to build a hearth for an Englander requiring a R value of 2 for the hearth.
Any help on a definitive materials list or a suggested hearth building type would be welcome . . . he is working on this today. Thank you.
My only problem is I've found three separate sources -- The Chimney Sweep's page and two hearth articles all of which have great looking lists, but some of the R values vary when you compare the proverbial apples to apples (i.e. 1/2 inch of Wonderboard).
Specifically the sweep says he needs to build a hearth for an Englander requiring a R value of 2 for the hearth.
Any help on a definitive materials list or a suggested hearth building type would be welcome . . . he is working on this today. Thank you.