Concrete Board Joint Compound

Spread joint compound over the length of the tape with a 6 inch drywall knife.

Concrete board joint compound.

Lightweight all purpose drywall compound and easy sand 45 minute. At 12 a sheet or so for backer i d start over and do it the right way. 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. Thick cement board spans studs spaced 16 in.

Setting type joint compound lightweight joint compound all purpose compound and others all have their unique uses. Instead of using drywall joint compound to embed the tape in the cement board you should use thin set mortar. Thick weighs 45 to 60 lbs. Make the seam just wide enough to cover the entire surface of the tape generally 3 inches.

Durock cement boards are a type of drywall reinforced with cement for a harder surface. Do not use lightweight setting type joint compounds or ready mix joint compounds directly over usg durock cement board. We utilized the same thin set that will be used to attach the tiles. 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. Learn the difference between them and get a better understanding of the choices for different situations. Plan the installation so the last column of tiles overlaps the. The joint between cement board and greenboard is similar to the joint between two pieces of cement board or two pieces of drywall.

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. Cement board technically called cementitious backer unit cbu is manufactured under different brand names. And is available at most full service lumberyards and building supply centers. Dab additional compound over the screw holes on both the drywall and cement boards near the seam but not under the tape.