stick on plasterboard to a brick or concrete wall
This is a tilt pannel wall to be sheeted with plasterboard
The methods shown here are exactly the same for a brick wall.
It is essential to place a plasterboard block on the floor to create
an expansion joint to prevent cracking.
The block remains in place until the adhesive has set, then remove the block.
To get a straight even finish it is important that all the daubs of adhesive
are about the same size.
The adhesive daubs are space around 450mm centers.
The ceiling height here is 3m so we are starting with a 600mm strip.
We always put the 600 strip at the bottom so all joins can be
finished without scaffolding.
Place the sheet in position at the bottom, sitting on the blocks.
Then GENTLY push the sheet back agains the adhesive.
It is important not to try and push the sheet hard against the wall.
This is the set out for the adhesive daubs for the second sheet.
You may notice I have used a chalk line to mark the height of the join.
Once all the sheets are in position we gently tap the sheets back to the wall.
Notice that I start in the middle with the straight edge
verticle but on an angle. I work along the sheet this way.
It is important to just tap it back gently into place.
Now I use the straight edge along the wall, the critical point is along
the skirting line I make sure this is perfect.
The ceiling/wall junction is the other critical point.
Finally I check the center again. Never do I need to use any force
to get a perfectly straight wall.
There are two types of adhesive that can be used to stick plasterboard to a masonary surface, MASONRY ADHESIVE and CORNICE ADVISIVE.
When sticking plasterboard directly onto a brick or concrete wall, you must make sure the wall is free of dust. A good idea it to use a broom dipped in water an dampen the wall down, the wall should not be "dripping" wet when you apply the adhesive.
A word of caution with tilt pannel walls. Make sure the walls are free of the release agent use in the manufacture of the pannels. You will need to use expansion joints on long wall, they should line up with the expansion joint in the tilt pannel.
Often you may find it better to use steel battens fixed to the wall on tilt pannels for the reasons mentioned above or if you have cables or pipes to cover.
To get a nice straight wall there are a few critical points to keep in mind. Make sure the adhesive daubs are evenly spaced and are about the same size. The daubs should all sit proud of the wall, comming into a peak, this allows the sheet to flatten out the daubs without a lot of resistance giving you a good bond. Provided you get the adhesive right the sheets will sit flat and will not require much tapping back to get them straight.