What is the correct way to double layer plaster board? Do you completely finish the first layer? or what stage do you finish it to? How do you attach the second layer? Do you offset any joints? Can you put expansion joint caulking along to floor/wall junction to seal it? etc etc and whatever other things spring to mind from the proffesionals out there. I'm thinking of the sound abatement style installations mainly...party walls, toilet walls, theatre walls. Is there thicker plasterboard avail than 10mm. I know in the USA they have some very thick stuff.


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