and effective heat retention

the Yukon shed will provide years of maintenance-free protection

Insulated double-glazed panels for superior thermal efficiency

The walls of the Thoreau are 6 ft

It is low-maintenance

Janssens | Royal / Junior Victorian 4 in. Top Shelf Shelf Length:7 ft 6 in (Junior Victorians - back wall) and effective heat retentionThe Janssens Royal Junior Victorian 4" Top Shelf is a great optional addition for your Royal Victorian or Junior Victorian Janssens greenhouse. This is a narrow 4" wide shelf that is intended to run the full length or width of your greenhouse, and is available in a number of different lengths. You can order your shelf in Black or Green. Note that this shelf should only be ordered with a greenhouse, due to the high shipping costs incurred if ordered