Table of Contents
Does it matter which way backer board go?
Either is acceptable, but we recommend that the smooth side with the nailing pattern of every 8″ on center go up. What subfloor should HardieBacker® cement board be installed over?.
Which side of cement backer board faces out?
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.
Can you tile directly on cement board?
Cement board forms a durable, stable base for tile, and it has no organic materials (unlike drywall, greenboard, or plywood) so it is not prone to mold, rot, shrinkage, or decomposition due to moisture. Ceramic tile laid over cement board is one of the most durable floor or wall surfaces you can install.
Do you have to tape backer board seams?
For tile backer boards such as Durock, Wonderboard, Hardiebacker, Permabase, and others the seams between the board need to be treated with 2-inch alkali-resistant mesh tape. It helps to make the walls that are to be tile more monolithic.
Do you need to seal backer board before tiling?
Contrary to popular thought, tile and grout are not waterproof, and some moisture will penetrate even if sealant is used. However, if you choose to use concrete backerboard, which is much stronger and more durable than gypsum board, a water vapor membrane must be placed underneath it or a sealant applied on top of it.
How long after backer board can I tile?
However, after you mount the backer board to the floor you simply have to seal the seams with mortar and wait until the mortar dries. This is normally 12 hours but may be up to 24 hours in some cases. After the mortar is dry the backer board is ready to receive the mortar for the tile.
Can you just screw down cement 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. It is important to highlight that screws shall not be installed all the way down to the floor joists.
Do you need Thinset under cement board?
Not only is thinset a critical component underneath cement board but the other critical component is the fasteners. And you won’t have the fasteners if you are trying to install it over concrete.
Should you wet cement board before tiling?
A. To be more precise, I’ve installed lots of concrete backer board for years, all with good results. The concrete is unaffected by any water that manages to get behind the ceramic tile. If you use cement backer board, you have to install a separate moisture barrier between the board and any wood it’s attached to.
How do you fill gap between cement board and drywall?
Fill the gap between the boards with mortar using the 6-inch taping knife. Force it into the gap and apply a thin layer on both sides of the joint for a total width of 3 to 4 inches. Place fiberglass mesh tape over the entire length of the joint and smooth it with the knife.
Can I use drywall mesh tape for cement board?
Apply Mesh Tape Paper tape simply won’t hold up on cement board. Although paper tape generally leads to a cleaner finish on drywall, you can still achieve a smooth look if you use mesh tape on a drywall/cement board joint. Use this self-adhesive joint tape where cement board and drywall meet.3 days ago.
How far apart should screws be in cement board?
Drill screws through the backerboard sheets every 6 to 8 inches. Position the screws at least 1/2-inch, but no more than 2 inches, from the edge of the sheet.
Do you use thinset under backer board?
Using thinset under cement board is a commonly skipped step amongst many contractors. However, many manufacturers including, both Durock and Hardiebacker not only recommend that you use thinset under their backerboard, but they specify it and will void the warranty on their product if it’s not used.
Do I need a vapor barrier behind Hardibacker?
Hardibacker doesn’t need a vapor barrier or waterproofing except you do need to tape and thinset the joints.
Can you walk on cement backer board?
Some cement boards are “softer” than others, so dragging a refridge over it will crush or damage some. the main thing is just be carefull of it. Thank you.
How do you attach cement board to plywood?
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.
What kind of screws do I use for cement board?
Cement board attached to plywood or similar underlayment will hold with only 1 1/4-inch screws; for thick or heavy metal fixtures, use 1 5/8-inch screws. In general, 1 1/2-inch galvanized nails will hold the board firmly in place.
Do you have to mud and tape cement board?
2 Answers. The thinset and mesh tape are to strengthen the seams. If you are going to tile over the cement board, you should tape the seams.
How thick should Thinset be under Backerboard?
How much thickness will thinset add? The thin set under the backer board may account for about 1/16″. The bond coat for the tiles about 3/32 – 1/8″. Your best bet is to use 1/4″ which should end up being 5/16″, standard thickness tiles can average about 3/8″ installed, plus or minus.
