How much space do you need to leave for the Floorify transition profile? 

To install the Floorify transition profile, you need to leave a clearance of 26 mm between the two floor panels. Take into account the width of the profile as well as the expansion joint between both floors and the rail of the profile.

Calculation:

5 mm expansion joint (left) + 5 mm expansion joint (right) + 16 mm (width of transition profile) = 26 mm (see drawing)

OR: you place the rail before placing the floor.