Sit the closer into the cavity at sill height.
Using a spirit level to ensure that one leg and the sill of the closer are plumb and square.
Hold the closer in place with a batten/plank as shown. If further adjustment for square us required simply remove one side of the timber bracing.
Brick/block up to the top of the closer using it as a brick-work guide, continue to check for level.
Brick ties to be fitted at 250mm centres staggered front and back.
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