Sunday, April 3, 2011

Bathroom Limestone - Part 2 of 3 - Durock® Cement Board Installation

Installing the Durock backerboard
Fig.1 Gary
By Gary Boutin 

Supplies and Tools:
Durock® backerboard 1/2-inch thick
Durock® tile backer tape
Durock® 1-5/8-inch steel wood screws
Knee pads
Painter's scraper Safety glasses
Square notch trowel 11/4-inch by 1/4-inch
Thin-set mortar

This job was located in the City of Pomona, a 5-multi-level condominium in a beautiful rural setting with mature oak trees and a well-established community. 

In this installation the client had the sub-floor removed and replaced with Oriented Strand Boards (OSB). The post shows the fourteen steps to install the Durock Backerboard. 

Step 1: Before tiling the bathroom, the plan was to install backerboard foundation for the tile. 
Step 2: Carl is helping me attach the Durock® backerboard inside the bathroom. 
Step 3: We wore protective gloves and knee pads during the installation. Backerboard, once cut, is very sharp and gloves must be used to protect your hands. 
Step 4: Once the sub-floor was replaced we knew that the floor was stable and ready for the backerboard installation. 
Step 5: Two sheets of backerboard were purchased for this bathroom. The backerboard came with an instruction sheet. 
Step 6: Above right a painter's scraper was used to score the backerboard. Then the board broke away just like sheetrock, only thicker and heavier. 
Step 7: Fig.1 shows the trowel line spreading the thin-set and then the application of the backerboard on top of the thin-set. We cut a hole for the toilet flange.
Step 8: We installed the backerboard on top of the new sub-floor. 
Step 9: Fig.2 shows two sheets of 1/2" backerboard purchased for the bathroom.
Gary is filling the edges between the bakerboard (cement) for the tile
Fig.2 Backerboard
Step 10: Fig.3 shows a gap between both backerboard panels and thin-set was used to glue the board to the sub-floor.  
Gary applying thin-set to the edges
Fig.3 Thin-set
Step 11: Fig.4 shows the Durock® 1-5/8" steel wood screws that were screwed every twelve inches.
These are special Durock 1 5/8 steel wood screws
Fig.4 Special wood screws
Step 12: Durock® Tile Backer Tape was used to fuse the two backer boards in place. 
Step 13: Fig.5 and fig.6 shows Carl measuring and drilling 1-5/8" steel wood screws into the backerboard and wood joists.
Carl is laying the backer tape on the seams
Fig.5 Carl laying backer tape
Carl is installing 1 5/8 metal screws into the backerboard
Fig.6 Carl drilling

Both Carl and I are strong and in good shape which is needed to move the backerboard in place. One board was placed easily on the first half of the bathroom, while the other board needed to be cut for the toilet flange.

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    Note: The DIY Advisor assumes no liability for omissions, errors or the outcome of any jobs. The reader must always exercise reasonable caution, follow current codes and regulations that may apply, and is urged to consult with a licensed contractor if in doubt about any steps on these posts. All names were changed to protect client's privacy. DIY Advisor. Reproduction of site content including photos without permission prohibited. All rights reserved. © Copyright 2011-

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