Damp and Wall Skins

[Yasman]

Hi,

I'm about to start a project to build an extension directly next to a neighbours existing extension. As the neighbours extension is single storey and mine will be double, I will need to build a brick + cavity + block construction.

Should I leave a gap between my brick skin and the neighbours brick skin to avoid damp coming through ?


========== Neighbours Block
++++++++++ Neighbours Cavity
------------------ Neighbours Brick

GAP HERE OR NO GAP

------------------ My Brick
++++++++++ My Cavity
========== My Block
------------------