sealing plasterboard

bugsntinas

i've recently put up insulation on the walls and then plasterboarded.i have used scrim tape on most of the joints but i have a question about some joints.most joints are quite tight but a couple have a gap of say half a centremetre how do i proceed?do i:
1 fill in the joint first then scrim tape then plaster or
2 just scrim over the gap and plaster?
i have used the lined side so will not be plastering the entire boards.

Spread

If the joints are wide enough to sick slithers of insulation into, then do that. Scrim the joints and either skim or use jointing compound to smooth the boards.

Al Capwned

+1 on what spread has advised.

scrim first.... then fill joints

Joey the lips

Are you tiling on the plaster board... If so dont bother doing anything but priming it for tiles.

heinbloed

Follow the manufacturer's recommendation.
A tape is always necessary as well as a solid filling, otherwise natural expansion and contraction will show severe deficits in workmanship.

Buford T Justice

Scrim is a bit thicker and harder to work with I find. I generally use jointing tape, and joint compound.

You'll need 3 coats and you'll need to feather the edges very well to blend in. After a few goes you should get the swing of it.

My advice is, for the first and second coat use the gyproc compound in the bag that you mix. It dries much quicker, but as a result you need to be quick. For the finish topcoat use their promix compound. Its readymixed in a bucket and is easier to use than the powder, but will take a lot longer to dry, and is not suitable for thicknesses of over 3mm



Check out some of these videos. They were some help to me when I wanted to learn about it

bugsntinas

thanks for the advice.never thought of using bits of insulation.