Stage 4

4) On the levelled area be it concrete or wooden batons lay out your first course of wall structures interlocking each corner course and placing the door spaces as appropriate.

This will give you a good visual idea of the building. Once the first course has been checked that it is very level (use a 4ft level) then start with the second row by first running a 5mm bead of silicon on the top inside edge of the first row. Repeat the silicon bead on each and every row.

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