AZ ranch

[EddieWalker]

Blocking is stronger and it will add overall strength to your rafters. Purlins go on top of the rafters and provide you with a place to attach your roof panels. They add a little strength, but as much as blocking. Your way is better, but a lot more time and effort.

 

[BoFuller]

I have 12 ft rafters. I put 30” of plywood along the top, and 18” along the bottom. That leaves 96” for my 8 ft panels.

What I didn’t take into account was my fascia boards. If I start the plywood at the top edge and the bottom edge, I’m going to have a 3” gap.

I’ll have to think on that one.

I know there’s a couple of people just dying to say I should have used a contractor. Save your breath. The building process has been fun and rewarding, even if I screw-up a few times. If i had to use a contractor or not have it done, I think I would choose not to have it done. Nothing against you contractors, I love ya. But the process here is more important than the finished product.

Besides, you can’t get contractors out here. My neighbor asked me to build her deck because 4 contractors said no and 3 said to call them back in 6 months.

I don’t think I’m going to do it for her as there’s a big difference between building for yourself and for someone else. I don’t want the liability of doing someone else’s.

 

[BoFuller]

Yes, that’s what I thought when you said purloins, but I don’t think they are necessary with the blocking and plywood.

 

[EddieWalker]

Where is the plywood going to go? I'm not understanding what you are doing with plywood and the roofing panels?

Why not run the panels from edge to edge of the roof?

 

[BoFuller]

Panels will go edge to edge left to right, but they are 4 ft wide and 8 ft long and the rafters are 12 ft so I need something to cover up the other 4 feet. I could cut some panels in half and do a row of 8 footers and a row of 4 footers but there’s little point of paying for panels to cover overhang that I’ll get no benefit from.
Just to clear it up, the panels must go vertically, 8 ft up and down and 4 ft wide. They are grooved and cannot be used horizontally.

 

[civilian]

How does rain that falls on the top piece of plywood drain onto the clear panels? Or does the the plywood overlap the clear panel? (Don't worry about forgetting tpo account for the fascia boards. Been there, done that. Had to add a 3" wide strip of osb to make it up.) Jon

 

[BoFuller]

The plywood and panels are about the same thickness. I’ll butt the panels up to the plywood and then I’ll probably shingle over the plywood, with some overlap onto the panels.

 

[civilian]

Thank. In my mind I saw the clear panels looking like the corrugated roof panels, about 1"to 1 1/2" tall, not 1/2" like plywood (or your thickness picked). Jon

 

[dstig1]

Remind me again why you are building a Greenhouse as a bunker underground? I'm sure the explanation is back a bunch of pages, but I am lazy

 

[BoFuller]

It uses the earth to keep a more consistent temp. The temp of the earth, usually around 50-55 degrees, will keep it warmer in the winter and cooler in the summer, thus extending the growing season, possibly to 12 months.