How wide can joints be in mortar for dwarf wall greenhouse

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hi how wide can the joints, be for a greenhouse build I know it says 10mm for load bearing structures ,but is there any leeway on this, as I have seen old houses with wider joint than 10 mm!
 
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10mm is standard but there's nothing stopping you having wider joints

The question is why?
 
hi how wide can the joints, be for a greenhouse build I know it says 10mm for load bearing structures ,but is there any leeway on this, as I have seen old houses with wider joint than 10 mm!

10mm joint isn't for strength, it's for keeping to metric gauge.

Bricks are 65mm high + 10mm joint = 75mm brick gauge.
 
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10mm joint isn't for strength, it's for keeping to metric gauge.

Bricks are 65mm high + 10mm joint = 75mm brick gauge.
So what does mean for gap, I'm pretty sure 10mm has to do with strength or compression! And what's brick gauge?
 
Brick guage is one brick plus i mortar joint, as per Notch.
Instead of filling the gap with part of a brick cut down just under the cill, can you use cut bricks laid on edge to take up one course and part of one course?
 
Brick guage is one brick plus i mortar joint, as per Notch.
Instead of filling the gap with part of a brick cut down just under the cill, can you use cut bricks laid on edge to take up one course and part of one course?
Can you explain that in English?
 
So what does mean for gap, I'm pretty sure 10mm has to do with strength or compression! And what's brick gauge?
If you could tell us what dwarf wall height you are trying to achieve that help us to advise.

Is it the difference between door frame and window height that is setting your dwarf wall height.
 
If you could tell us what dwarf wall height you are trying to achieve that help us to advise.

Is it the difference between door frame and window height that is setting your dwarf wall height.
It'll be 5-6 courses high! 8ft X 6.5Ft
 

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