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Minimum base sizes
Lean to greenhouse, 9ft projection
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.
8'9" x 10'11" GREENHOUSE = minimum base size 2660mm projection x 3340mm long (8'9" x 10'11")
8'9" x 13'0" GREENHOUSE = minimum base size 2660mm projection x 3970mm long (8'9" x 13'0")
8'9" x 15'1" GREENHOUSE = minimum base size 2660mm projection x 4600mm long (8'9" x 15'1")