What do I use for durock 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.

What kind of mortar do you use for durock?

Apply latex-fortified mortar or Type 1 organic adhesive with a notched trowel. Hold trowel at an angle to maintain uniform thickness.

Should you tape cement board joints?

If you are going to tile over the cement board, you should tape the seams. This should not be that difficult. Pack in thinset, lay on the tape, and flat-knife to get it set in. In the corners, use a corner knife.

Do you need to tape durock 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. Then a coat of thinset gets flat troweled over the seam. What this does is tie the two boards together and help prevent flexing.

How do you seal durock seams?

Cut fiberglass mesh tape to fit in a single layer over every joint where the panels meet, but do not overlap the tape. It's OK if it's an inch or two short in spots. The tape is self-adhesive and will stick to the Durock panels. Press and smooth the tape firmly in place.

Taping Cement Board Joints-Step By Step Tutorial

Can you use joint compound on durock?

Durock Cement Boards are a type of drywall reinforced with cement for a harder surface. This type of wall material can be finished just like ordinary drywall, using joint tape and joint compound.

What thinset is used with cement board?

Spread Mortar

It's used to bond ceramic or porcelain tile and cement backer board.

What's the difference between mastic and thinset?

Thinset is inexpensive and it fills in gaps and depressions. Mastic is very sticky, grabs fast, and is quick setting. Thinset is slow to set, which leads to tile sag on vertical applications. Mastic can give off a sharp, strong odor that takes time to dissipate.

Can I use drywall joint compound on cement board?

When using drywall compound over cement board, it is recommended, but not required, to use a faster setting-type joint compound (45 or 90 min), than typical joint compound. Make sure to follow manufacturer guidelines for the products used to finish the non-tiled area.

Can I use mastic on cement board?

The textured side is ideal for mortar applications, as it enhances bonding and reduces tile slip. That said, mastic or thin-set mortar can be used on either side of the board without compromising performance.

Which side of durock faces out?

According to information in U.S. Gypsum's Web site (www.usg.com), the smooth side of their Durock product is for mastic, and the rough side is for mortar applications. The textured surface enhances bonding and reduces tile slip.

Can I use thinset as grout?

Thinset mortar is an adhesive and binds the tile to the subfloor beneath. Grout is a filler used in the joints or gaps between the tiles. The products aren't interchangeable. Using mortar as grout to fill in the cracks could cause problems for your floor over time.

Can I use mortar instead of thinset?

Thinset is an adhesive cement used to secure floor and wall tiles to concrete surfaces. The word “thinset” is sometimes used interchangeably with “mortar,” because it's a type of modified mortar made specifically for tile.

Does Redgard bond to joint compound?

I didn't test redgard on joint compound on greenboard. Redgard peels right off my joint compound. I did prime properly (4:1 water to redgard mix painted over all surfaces), but it has no effect - probably because my joint compound is "dusty", that is, the top layer is a bit powdery (never been a problem with paint).

What is durabond for?

It is an excellent compound for embedding tape, bead and trims on gypsum panels. It's special formulation provides a high strength bond with low shrinkage that finishes with a hard, plaster-like surface when dry and is virtually unaffected by humidity.

Do I need to seal cement board before tiling?

Although most backerboards currently available won't fall apart when exposed to moisture and are somewhat water-resistant, they aren't waterproof. To prevent moisture from seeping through to the wood or metal studs beneath the tile, a barrier or sealant must be used on porous materials.

How far apart do you screw durock?

Fasten board to wood studs spaced at 406 mm (16") o.c.1 with 32 mm (1-1/4") CGC Durock Wood Screws or 38 mm (1-1/2") hot-dipped galvanized roofing nails spaced 203 mm (8") o.c. for walls, 152 mm (6") o.c. for ceilings, using with the same spacing.

Can you cut durock with a circular saw?

Use power tools on large projects or thick Durock to muscle through the process with ease. A circular saw with a carbide-tipped woodcutting blade is the best tool for the job. Opt for a blade with as few teeth as possible. Unlike cutting wood, the less teeth, the less dust when cutting Durock.

How often do you screw cement 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.

Is tile adhesive better than thinset?

If installing a small area of ceramic floor or wall tiles, mastic is the better choice. The adhesive is premixed, does not require water and will hold the tiles in place with no beating or additives. If installing a large amount of tiles, stone tiles or glass tiles, thinset mortar should be used.

Will thinset stick to RedGard?

You can install thinset mortar and tile directly onto RedGard. For best results, mix mortar in small batches and apply it to the shower wall a small area at a time. Use a notched tile trowel to spread mortar whenever you are tiling over RedGard.