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Old 02-15-2014, 10:24 AM   #1
MarginallyQualified
 
Join Date: Dec 2011
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Want to put tile in a fireplace hearth...


...a used hearth. With soot on the walls.

1) What sort of tile/mastic can take radiant heat from a little wood stove?
2) What surface prep is needed to get the mastic to stick?
iow... how best to clean it and how clean is "good enough"?

Thanks
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Last edited by TarheelTerp; 02-15-2014 at 10:27 AM.
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Old 02-15-2014, 10:45 AM   #2
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Want to put tile in a fireplace hearth...


You need a cement based powdered modified thinset---and to deal with the possible expansion due to the heat--a good one---high polymer count---

Look for the word 'flexible' or similar in the name----

As to clean? Wash the old brick with soap and water---you want to be sure there is no grease or other bond breakers like that--but brick is a good surface for tile---and a fireplace is not likely to be greasy----
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Old 02-15-2014, 11:54 AM   #3
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Want to put tile in a fireplace hearth...


oops---you meant the fire brick inside!

Use TSP and a stiff scrub brush to remove the soot----the fire brick is soft---some sanding will also work if the TSP fails----then use a food modified thinset--
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