What size joints for concrete blocks?

Question

How wide should mortar joints be between concrete blocks?

Ian · Accepted Answer

Concrete blocks 12mm. As they will sink slightly when laid but conditions account ie. Wet blocks, hot weather .

Gary · Answer

10mm. Anyone tells you any dif doesn't know what there talking about or didn't go to training centre to earn there nvq levels

Jack · Answer

10mm roughly all joints should be uniformally 10mm

Paul · Answer

All mortar joints should be 10 mm this is what building regulations require based on all sizes of blocks and bricks, and they are all metric.

Jamie · Answer

The correct answer is 10-15mm with a 10mm bed. This will also help when you measure to see if it all measures out to full blocks.

Dean · Answer

All brick and block work are 10 mm.joints and mortar beds

Liam · Answer

Normally 8-10mm thick the joints should be when finsihed,

Luke · Answer

10mm centre of below block keeping half bond as you build

Martin · Answer

When building with concrete blocks each joint is approximately 2mm wen blocks are leveled upped and squared

Victor · Answer

Normal 10mm but sometimes you have to Grind down to suit  existing or bump up

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