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Minimum base sizes
Lean to greenhouse 04
We recommend that your base should be no smaller than the minimum base size listed below and no more than a few inches larger.
The first dimension listed is the external projection (A) and the second dimension is the external length (B). The projection is measured from the existing building.
4'2" x 6'4" GREENHOUSE = minimum base size 1273mm projection x 1920mm long (4'2" x 6'4")