Side walls come with hidden air holes for better ventilation

Permanent marker

Material: 100% compostable vegetable material

It does not provide any additional thermal insulation

Four roof vents with automatic openers (no electricity required)

Janssens | Wall Wind Brace Color:Green Side walls come with hiddenThe Janssens Wall Wind Braces are additional extra wind straps that can be added in corners to increase wind rating of your Janssens greenhouse. Your Janssens greenhouse comes standard with one strap per corner glazing panel. Use these extra straps to add a second strap (in an X pattern with the existing standard strap), when your structural engineer calls for them, or when you are in a high wind area and want extra stiffness in the corners. They are