Although I do not have a Travis greenhouse, I can offer a few observations based on the link and photos.

The single layer, corrugated polycarbonate panels look nice, but compared to twin-wall they will lose about twice as much heat in the winter. I would ask if twin wall can be substituted for the single corrugated panels.

From the photos, there does not appear to be top ridge vents. The end vent option would help, but would not provide enough ventilation, compared to roof top ridge vents. Also, bottom side vents would be needed with either venting option.

This post was edited by cuestaroble on Sat, Sep 7, 13 at 21:02

Thanks for the feedback, cuestaroble. I had wondered about the single wall, I think they have some sort of corrugated shaped foam to seal the end pieces, but I do think a twin-wall product would be better than trying to create some kind of "air pocket" after the fact with bubble wrap, plastic, etc.

It sounds like the more vents the better, here in Zone 7. I'd originally wanted to custom-build a greenhouse out of mostly sliding patio doors so that I could really VENT it (even my tiny 6x8 HFGH was an oven on sunny days, and that was missing half its panels). When I saw this, I thought a similar pricepoint but without me doing all the work sounded great. But might be too good to be true. The fabricator is supposed to call me when he next brings a shipment to our area so I can go look at in person. We shall see and I will update then.

Any other feedback or comments in the interim are welcome!

I have not just one but two of Travis's greenhouses. I don't think you can go wrong with one of his greenhouses! The quality of materials and workmanship is exceptional. We bought our first freen house in May 2012. We were so impressed with what was delivered, we gave him the money for a second greenhouse before he left. I do hope you give good consideration to ordering from him...I don't believe you will regret it. Iknow I am still thrilled with both of my greenhouses!

I am considering one of his greenhouses. Can you comment on the corregated glass? How do you heat if at all? What about the ventilation? What part of OK are you in. I am in the Tulsa area. I will also send you this in an email in case you don't check this forum anymore.

I am thinking about getting a yoderb[lt green house. I wanted to know if you can use this year round ? I live in se Kansas zone 6 . does anyone have one of these ? and how do you like it ?