I have the bubbles towards the glass or outside. It adds another barrier, a good dead air to prevent heat escaping. It's also needed to join them with tape.

Sorry but i am completely new to this.

what is bubble wrap? like normal shipping bubble wrap. I understand what its for(extra insulation). Who sells it?

I may be wrong, but I think that putting the bubbles towards the outside creates a layer of air between the bubble wrap and the polycarb (air can move or be trapped between the bubbles)...that air is what gives you insulating properties (which is why there are channels in polycarb panels - air channels for insulation). If you put the flat side against the panels, there wouldn't be an air layer, and it would be less insulating. That's how I understand it, anyways.

Mine is bubble side out, and I could tell the difference immediately when I put it up, even more so when I taped the edges of the bubble wrap together. It's a huge difference from just the polycarb panels.

Call your local packaging or packing house where you will spend about 70% less than if you buy it from one of the GH places online. They also sell it in 24" and 48" and almost any length you want. Don't let them BS you as it's the same stuff.

Bubble side out makes the insulation much more effective you look at it their is cavity between the bubbles and since the air gap is where the insulating comes from if you place it with the bubbles inward then the heat will go right through between the bubbles nothing their but a thin piece of plastic.
With the bubbles facing out you trap the air in between and that is how it insulates
Take a moment to look at it and it is easy to see why the bubbles must face out.

I got mine from a local moving truck rental company. It came in boxes of 12 inches wide by 100ft. long - unfortunately, they didn't carry anything wider, but I just taped the strips together after I hung them up. It was $24.95 per box, and I needed just a little bit over 1 box for my 6x8.

picky but...

The reason they say "Bubbles toward the glazing" is because it all depends on whether you install it inside the greenhouse or outside. The effect is the same though.

Saying Bubbles out would be wrong if you install it on the outside.

If it's installed on the outside I doubt it would survive the first good storm. Does anyone put BW on the outside of the GH?

Just out of curiosity, what diameter and thickness is recommended or maybe the better question is what is everyone using? I've found a few good (cheap) suppliers selling different widths, lengths, grades and bubble sizes.

All suggestions on bubble size are welcomed.

L8r,
Don

1" bubbles is the usual. The rolls came in 2' and 4' rolls.

I put my solar pool cover on the outside a couple of years ago, bubbles in...it didn't work that well and I froze several times trying to resecure the darn thing in the middle of winter.

I bought my bubble wrap from Uline because I wanted their extra heavy, 1 inch bubble in 24" width, to allow me to install it wedged between the polybars on my GH. It wasn't the cheapest, but is so heavy, I have yet to burst a single cell, in spite of abusing it.

The only downside was the need to buy so much: 2 rolls of 250 ft. each and I was fortunate in having a friend to split the order with me. So the total for the 250 ft. it took to entirely line my 12 X 16 X 12 ft. high GH was about $160.00 including shipping.

However, it paid for itself in its contribution to incredibly cheap heating bills all throughout the winter and will continue to serve to help keep the GH cooler in summer.

Stress: I'm confused by your description of an inside/outside of a solar pool cover. Mine is the same on both sides. I suppose they vary in design?

OK. Have finally installed my bubble wrap on the inside of the LL 10x12 HFGH with the bubbles towards the polycarb.

Not really excited about the green push in tabs, but I guess that that is the only way. My problem now has to do with those corner clip. For the life of me I can't make any sense as to how I'm supposed to connect the poly from each wall together.

Does anyone have any pictures of their application of the green corner clips and how they connected the bubble wrap.

Thanks.

Joe