Technical Booklet G Resistance to the Passage of Sound·Page 74·3.51
Floor type 1.2B with separating wall type 3.2 – joint positioning
Where separating wall type 3.2 is used with floor type 1.2B and planks are parallel to the separating wall, the first joint should be a minimum of 300 mm from the centreline of the masonry core.
Where separating wall type 3.2 is used with floor type 1.2B and the planks are parallel to the separating wall the first joint should be a minimum of 300 mm from the centreline of the masonry core.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet G - Resistance to the Passage of Sound.pdf