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I'm doing a single story extension to a 1930's property with a slate DPC. The DPC mortar bed is approx 40mm thick. How should I go about matching this when tying in the extension to the original brickwork? What's the maximum depth mortar bed, and would I need to pack it out with something? A...

Motion Beam Pad Foundation Connection We're having a single story extension to the rear of our property approx 7m wide, by 3.5m depth. A structural engineer has provided calculations for the necessary steel including a motion beam/steel goal posts. The motion beam columns require 1x1m x50cm deep...