Position each piece of backer board in the thin-set, press in place, and attach using special backer board screws on the spacing recommended by the backer board manufacturer. Cover the joints in the backer board with fiberglass tape embedded in thin-set adhesive and allow to set before tiling.
Likewise, people ask, can you put backer board over plywood?
If you’re working over a wood subfloor, cement board is the right choice for your tile base. No matter what you’re told at a home center, it’s not a good idea to install tile directly over plywood, especially in a damp area like a bathroom.
Also, do you have to put mortar under backer board? You cannot put a cement backer board over that. You need to put a layer or plywood, minimum 5/8 IIRC, over those boards, then mortar the backer to the plywood. Those 1×8 boards won’t give a solid foundation and will flex. Over time, that will cause tile to pop loose or crack.
Secondly, how do you attach subfloor to backer board?
- Introduction. Check the Area.
- Lay the Backer Board. Lay the backer board in a “brickwork” type pattern–meaning that sheets are offset.
- Apply the Mortar. Using a notched trowel, apply a leveling bed of thinset mortar over the subfloor and embed the backer board sheets into the adhesive.
Do I need plywood under cement board?
The Surface Below the Cement Board Flooring: For ceramic tile floors, the cement board usually rests on a plywood subfloor (minimum 5/8-inch-thick exterior-grade plywood or OSB). (Some cement board products may not require the underlying membrane if the seams are properly waterproofed.)
19 Related Question Answers Found
How do you fix backer board to floor?
If you floor is solid then you lay the hardie down in a staggard pattern using adhesive initally and then screws. The adhesive is only there to fill potential voids underneath the board and not as an adhesive. Use a flexible adhesive both below and above the boards and screw the boards down at about 200mm centres.
Can you put Thinset on plywood?
While you can lay tile directly over a concrete slab using thin-set adhesive, don’t make the mistake of applying tile directly to a plywood subfloor. No matter how firm the subfloor; the plywood will expand and contract at a different rate as the tile, causing cracks to develop in the grout lines or tiles over time.
How many screws come in a Hardibacker sheet?
Fasten a minimum of 12 screws into the board (4 rows of 3 screws). Keep fixings between 15mm from board edges and 50mm from board corners. Fill the gap between floor and wall edges with good quality bathroom sealant.
Can I tile on plywood?
While tile can be laid on plywood, do not install tile directly onto the plywood subfloor itself. Use intervening layers of two sheets of plywood.
How do you attach durock to plywood?
Cover plywood base with USG Durock™ tile membrane, 15 lb. felt or 4-mil polyethylene and attach with 1/4″ galvanized staple. Fit ends and edges of panels closely but not forced together. Stagger panel joints from plywood base joints.
What is the difference between modified and unmodified thinset?
Unmodified thinset has been around forever. Unlike unmodified mortar, which consists only of a blend of Portland cement, sand, and water retention agents, modified thinset includes additional retention products, such as latex polymers, which can increase its performance and strength.
How do you put down backer board?
backer board Step 1: SNAP A GRID OF CHALK LINES TO MARK THE LOCATION OF BACKERBOARD. Step 2: WHILE THE MORTAR IS STILL WET, PLACE A SHEET OF BACKERBOARD ONTO IT. Step 3: SECURE BACKERBOARD WITH SCREWS. Step 4: FILL THE JOINTS WITH MORTAR. Step 5: COVER JOINTS WITH FIBERGLASS TAPE.
What kind of Thinset do you use for Hardibacker?
To save a few bucks, you can use dry-set mortar under Hardi, but if you want to simplify things and deal with only one thinset, use a modified thinset like 253 Gold for both applications. Rialto is a porcelain tile that has deep depressions on the back.
What kind of screws do you use for Hardibacker?
Cement Board Screws are designed for attaching HardieBacker or equivalent fiber cement backerboard to wood or light gauge steel studs. Backer-On’s patented serrated head design countersinks for flush seating at any angle, providing a smooth surface for tile.
Can you use 1/4 inch cement board on floors?
Floors. Both 1/4- and1/2-inch cement board are appropriate for floors. To install cement board on floors, cement board manufacturers mandate a 5/8-inch plywood subfloor or OSB underlayment. They also require a 3/4-inch subfloor where tile size exceeds 12 inches.
How do you fasten Hardie backer board?
Fasten HardieBacker cement board with specified nails or screws (as listed in “Materials Required”) every 8 in over the entire surface. Keep fasteners between 3/8 in and 3/4 in from board edges and 2 in from board corners. Prior to setting the tile, fill all joints with the same mortar used to set the tiles.
How do you screw down Hardibacker?
Screw the HardieBacker into the floor, using 1¼-inch backerboard screws and using one screw every 8 inches. Offset the interior screws so they are staggered with the outer screws, and make sure no screws are closer than two inches from the edge.
Can you walk on backer board?
You need to fasten the backer-board before the mortar sets up underneath, so walking on it while it’s wet isn’t a problem.
Can you screw down backer board?
Screw and Joints Do not use drywall screws as they are not recommended to be used to hold the backer board in place. All of your backer board pieces should be cut before they are placed on? the floor. Along the perimeter, screws should be installed at least ½ inch from the edge, but no more than 2 1/4 inches.
How much does backer board cost?
A 3 x 5–foot sheet of 1/4-inch backer board costs between $9 and $11; the same-size sheet in 1/2 inch costs about $12 to $14. The one challenge DIYers face when working with cement backer board is how to cut the rock-hard panels. Fortunately, there are a few different options.
Do you need to put Thinset under Hardie board?
You do not need to tape or thinset. The thinset you use for tiles will cover any gaps (and gaps don’t need to be filled). I suggest you lay down plywood over the planks with subfloor glue and decking screws.
Which side of Hardibacker board goes down?
Cement board has a smooth side and a rough side. Face the rough side out if you will be using thin-set mortar adhesive to install the tile but the smooth side out if you will be using latex mastic.
Should you put cement board under a tub?
There’s no real reason to have the cement backer board under the typical tub. I usually just run it under the front edge a couple or three inches so the tub is resting on it, and the rest of the tub is supported by the wood blocking attached to the studs.
How do you attach cement board to plywood?
Leave a 1/4″ gap between the backer board and walls and 1/16” gap between the sheets of backer board. Mix up and apply a modified thinset to a large enough area of the plywood subfloor to cover each piece of backer board using a 1/4″ x 1/4″ notched trowel.