Concrete Board Joint Compound

Dab additional compound over the screw holes on both the drywall and cement boards near the seam but not under the tape.

Concrete board joint compound.

The standard size sheet is 3 x 5 ft. Do not use lightweight setting type joint compounds or ready mix joint compounds directly over usg durock cement board. And is available at most full service lumberyards and building supply centers. Formed in a continuous process of aggregated portland cement slurry with polymer coated glass fiber mesh completely encompassing edges and back and front surfaces edges.

We utilized the same thin set that will be used to attach the tiles. Thick cement board spans studs spaced 16 in. Plan the installation so the last column of tiles overlaps the. Redgard is approved for use over drywall but drywall joint compound is not the right thing for filling those joints according to the cement board manufacturers and thats the wrong tape as well.

Instead of using drywall joint compound to embed the tape in the cement board you should use thin set mortar. Make the seam just wide enough to cover the entire surface of the tape generally 3 inches. Get it smooth and flat. Learn the difference between them and get a better understanding of the choices for different situations.

This type of wall material can be finished just like ordinary drywall using joint tape and joint compound. Having the cement board alkali resistant screws joint tape and mortar will get you one step closer to installing the tub surround the right way. The joint between cement board and greenboard is similar to the joint between two pieces of cement board or two pieces of drywall. Lightweight all purpose drywall compound and easy sand 45 minute.

Joint compound is used to help provide a seal between the durock panels and to fill the depressions left by either nails or screws during installation. Thick weighs 45 to 60 lbs. At 12 a sheet or so for backer i d start over and do it the right way. Setting type joint compound lightweight joint compound all purpose compound and others all have their unique uses.