Hi I am a weekend DIYer so my knowledge is a bit sparse to say the least ! I want to build a wall across an internal alcove about 6 feet wide. I have the timber for a stud frame ready to go ! But would have to set this back into the alcove to allow for the PlasterBoard depth.I am ready now to fit the Ceiling plate !
The question is how much do I have to set it back ? If at all and what tricks can I use to get the wall flush to the Existing wall ? Then there is the question of a seamless joins & finishing ! Presume I know very little ! Thanks !
the plasterboard should be set 3mm back from the finished plaster, On the existing wall cut the finish plaster back about 75mm wide and 3mm deep. Then use some fibre tape or skrim as its called, to bridge the gap between the plasterboard and the existing plaster. Paint the gap and the existing plastered wall with a pva solution, and plaster
If you go a little over the 3mm deep on the existing wall, don't worry. Paint with Pva and add a thin layer of skim plaster, then as this is dring out, add a little more. You can do this up to about 5mm. If you go any deeper than that (for example if you accidentally get back to the brick surface of the original, you can use this Polycell plaster repair tub.
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