Janssens | Greenhouse Roof Vent Model:Cathedral (Special Order) Additional rubber seals at the

Additional rubber seals at the top and bottom of roof panels provide an extra layer of weather resistance

10-Year Limited Warranty

even light

100% UV protection and high impact resistance

Janssens | Greenhouse Roof Vent Model:Cathedral (Special Order) Additional rubber seals at theThe Janssens Greenhouse Roof Vent can be added to any Royal Victorian or Cathedral Greenhouse at the time of order. They come in black or green. Most Royal Victorian and Cathedral Greenhouse models already include at least one roof vent. You can add as many roof vents as you want to your greenhouse with the caveat that you cannot put the vents adjacent to each other so 'every other panel' would be the most you can add. Optional auto openers and fly