Linear gap sealing when dot and dab plasterboard in use on a blockwork wall

[Guest Elliott Sentance]

In BS 8214 2016 none of the diagrams show dot and dab plasterboard as to where the sealing should be - i.e should capping seals be covering the gap in blockwork upto a door lining and brought to the face of the plasterboard closing off the void to the rear of the pasterboard as well? Or if joints to a lining and blockwork are tight, should that joint be opened up to min 5mm to place a capping seal here? 

[Neil ashdown]

If the joint between the timber door frame and blockwork wall is so intimate that there's no gap, then there is no linear gap to be sealed. Where there is such a gap it should be sealed using BS 8214 guidance. Intumescent sealant should be present level with the edge of the door frame and face of the wall.