Fastening HardieBacker to the Subfloor in Guest Bathroom

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The pre-cut HardieBacker is ready to be put down on the thin-set. Since we don’t have running water yet, we chose OmniGrip thin-set because it’s pre-mixed.

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The first of three pre-cut HardieBacker pieces.

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The second HardieBacker piece will be placed at the end of this larger piece, beneath where the wall-mounted sink will be installed. The third piece will be at the entrance.

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This is why dry fitting is so important because the backerboard is  now perfectly installed on the thin-set.

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Using Backer-On screws by Hardie is the next step in fastening the backerboard to the 1954 subfloor. Absolutely DO NOT use drywall screws or drywall nails on cement board; they don’t have adequate holding capacity for the combined cement board, thin-set and floor tile.

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A must-have box of these screws have the ability to counter-sink in the backerboard.

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There are round shallow marks on the backerboard for drilling in the screws which fasten the board to the subfloor.

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The HardieBacker screws are counter-sunk so that the tile will lay perfectly flat.

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After John finished drilling the screws into the backerboard, he continued applying the thin-set with his notched trowel in the last section of the subfloor (in front of the shower).

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Stay tuned for more…

 

 

 

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