Frequenly Asked Questions
How much does it cost to deliver and install?
When you purchase a beautiful new greenhouse from NW Green Panels, our professional crews deliver and install it for free in Oregon and Washington. For customers outside OR & WA please contact us for shipping rates. Orders are drop shipped ready for installation by your preferred local contractor. (OR CCB 209920 / WA CCL NWGREGP842D4)
What kind of a base do I need?
Creating a proper base or foundation for your greenhouse is important for structural longevity, pest control, and creating the right ambiance in your garden area, as well as contributing to overall functionality of the building. Bases can be as simple as a leveled out gravel or as complex as your imagination provides. For more detailed information on base installation please *Click Here*
What size should my greenhouse be?
Most companies will tell you to go as large as your space and budget allows, but with NW Green Panels modular design you can add space and accessories as you need them. Pre-assembled building components we call "panels" can be quickly unbolted to move it to a new location or to expand your greenhouse's length or width, months or even years from now.
How do they hold up in the wind & what about Snow-load?
Our gorgeous, conservatory style greenhouses are designed, built and tested in Sisters, OR to withstand the harshest environmental conditions: feet of accumulated snow, 80 mile per hour wind gusts, monsoon rains, large-hail storms and 75 degree intra-day temperature variations. Framed-in glazing panels and full 2x4 frame construction make our structures rock solid.
Do I need a building permit?
Greenhouses by NW Green Panels are temporary agricultural structures and typically do not require a permit under a certain square footage, in most areas 120' - 200' sqft. Please check with your local building code agency.
Why is Incense Cedar One of the Best Frame Materials for Greenhouses?
Incense Cedar is one of the most durable wood species found in America. Once widely used for nursery flats, fencing, framing, gates, greenhouses and other purposes where high humidity and moisture are always present, it has since been replaced by cheap, less durable materials by many manufacturers. Naturally desiccating moisture, Incense Cedar eliminates algal and fungal buildup at seams where frame and glaze material meet. Strength, termite and decay resistance, gorgeous knot structure and incredible dimensional stability make this locally sourced, kiln dried lumber ideal for greenhouse construction.
Do Your Greenhouses Have Good Ventilation?
Our greenhouses use our unique and highly effective Auto-Rise Ridgeline Vent System. Commercial grade Bayliss MK7 Hydraulicheck automatic vent openers lift the entire ridgeline of your greenhouse from end-to-end automatically between 70F-100F degrees, and lowers it back down when things cool off. Peak ventilation is ideal, allowing the rising heat to escape and passively drawing cooler air in.