What made you feel good today?

[tommyardin]

[quote author=tommyardin link=topic=23732.msg288575#msg288575 date=1544209370]
Yeah Metric gauge is tighter than Imperial by 1.2mm per course of bricks, that is why building an extension on a imperial gauged house with metric bricks when they were the standard was a bastard as you either, lost gauge again the main house or you ended up with large bed joint to keep up. Seeing as you new brickwork bonded/tied into the original you ended up with large bed joints , of course on a complete new build it was not a problem.

On an old building with new brick extension and if you are not bonding/tieing in which forces you to keep up. Which looks uglier - deeper beds to try and keep up or mismatched brick to brick. 
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The image I grabbed off the net showing the Crocodile Profile wall tie system is actually incorrect, you have to have a damp proof break between the external wall and any internal wall. As you can see in that picture the external of the original property has become an internal wall of the new extension and therefor should have a damp proof barrier between the two. What we used to do is cut a 10mm wide slot right through the wall the a large petrol diamond disc cutter and slot a damp proof membrane into the slot to form this damp proof break See revised pic.
I not sure that most councils would even accept this anymore as they are insisting on a thermal break as well, this method does not meet this criteria. it should now be a full width cavity to match the cavity size of the new extension.
Sorry if this is boring some but as an ex brickie I find it interesting.  :finger