We are changing the tiles in our kitchen. So do we have to remove the black adhesive under the tiles in order to put in the backer board. Or can we just install the backer board with out removing the old glue?Do you have to remove the old adhesive in order to install the backer board?
u can leave the old glue if u smooth out the area with filler so that the area is flush..let dry and then install the backerboard..be sure to seal the joints......
lic. gen. contractor
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