German to English Tech/Engineering Construction / Civil Engineering Specifications for garden shed

Hi, I'm translating a catalogue description of a wooden garden shed but am stumped by Schleppdach. I assume it means slanted roof but that doesn't seem to make sense given the rest of the sentence.

The sentence, which is part of a list of features, reads: 14 mm Massivholz-Satteldach mit 50 cm Schleppdach

I translated this as '14mm solid wood pitched roof with 50cm overhang' but I don't think 'overhang' is right. Another meaning of Schleppdach is lean-to roof but the shed only has a simple apex roof according to the image provided.

Hope someone can help.