Do I need joint tape if I'm not plastering?

Hi. You are describing a drylining process rather than board and skim. I do know that dry liners use tape over board joints as they fill or before they fill. Otherwise the filler will crack along the joint of the board due to expansion and contraction.

Hi, you can either tape and fill the joints which is normally referred to as tape and jointing or you can plaster the ceiling. So yes you can tape and joint then paint them after. To tape and joint; 1. you must apply a scrim tape or paper tape to all the joints and wherever the plasterboard meets the existing wall. (NB:the paper tape application is quite a complicated process so advisable to stick with scrim tape or fibatape). 2. You then apply a first coat of filler ( which can be an easi-fill compound or Joint filler compound) on all the joints, corners ( usually where the new boarded ceiling meet the existing walls) and the screw heads and allow it to dry usually with few hours. 3. You then apply a second coat, this can be done with a quick sand compound, a joint cement compound or an easy-fill compound over your first coat. Allow some few hours for it to dry also. 4. You could ( as this is optional depending on the level of quality you want, I’d always recommend this coat) then apply a third which is usually a repeat coat of your second coat the allow a day for it to dry properly ready for sanding down. Please note that each coat applied should be applied area than the previous coat. For example if the first coat was applied let say 8inch wide, then the second coat would be 10inch and the finishing or third coat would be applied at 12-14inch wide. 4. The last step is to sand your joints, corners and screw heads down with a sanding machine with an extractor (highly recommended) or a hand sander with a sand paper attached. The sanding paper should be either 120grit or 150grit for a smooth finish. 5. You can then apply your mist coat of paint follow by 2 coats of your emulsion paint. Job done!! HAPPY DAYS!!!

It tends to be good practice to use some sort of tape over the joints as it resists hairline cracks appearing between the boards, making your finished job better. Sealing the board will have a similar effect as mist coating so depending on what you use to mist coat and how well you have sealed the boards, also the quality and thickness of your paint, you probably dont need to mist coat. If not sure brush an area with water and see how long it takes to dry. If it dries very quickly, mist it first, if not your good to go.

That will be good wi joint tape

HI, You need to tape joint and sand at least otherwise your painted surface will crack after painting. Ideally tape joint and plaster then paint.

Any plaster boards joints without tape it’s a big NO NO .