Amazing the price is less than you paid six years ago. Good thing is, you'll breeze right through putting this one together. My 10x12 is about 6 years old too, replaced the roof panels not quite two years ago, will replace most of the wall panels this summer. All else is rocking along just fine. I think these are a great deal, too.

I think you would have to sleep in there all night to make it work. My HF 6 by 8 has a cheap fan type electric heat on a thermostat. It is 1200 watt, but I have it set at 750 watt right now. I am happy with it. It is coming on an hour or two each morning. Mostly I have it to guard against frost. About 10 cents per hour to run.

I love mine! Wish your panels were in good shape, I'd take it just to have spares.

Hi Sandra, here's a link to an excellent blog about building the 6x8 Harbor Freight greenhouse. The owner of the blog did raise the height of the greenhouse, so it may have the help you're looking for. Building and Improving the 6x8 Harbor Freight Greenhouse I have the 10x12 Harbor Freight greenhouse. When we built our foundation, we first laid out the metal base parts, and joined them together, and used that as a template to be sure we make the wooden foundation the correct size. I've had people contact me that tried to use the measurements listed in the 10x12 manual to build their wooden base first...and then found out later the measurements in the manual weren't quite right. In other words, I think it would be safest to use the dimensions of the actual base pieces in your kit, instead of depending on measurements you find on the web, or in a manual. It would be such a shame to do the wooden foundation...and then find the metal base didn't quite fit! Here's a link to my blog also. Although there's a little difference in the size, you may find info here that is generally helpful. Specifically, be careful about installing the polycarbonate panels by using only the clips included with the kit. Many folks who have only installed the panels as per the instructions have later lost panels in strong winds. It's easy to add a screw or two through the panel into the aluminum frame, and both of the blogs in this post offer suggestions about how to make your greenhouse stronger in winds. Building our 10x12 Harbor Freight Greenhouse Best of luck with your build!