Bubblewrap Insulation

Hi All.
I have read all the pots on insulation regarding bubble wrap. I have had bw in greenhouse for a number of years, the sides are just made up of the small bubbles but the roof is the larger type purely as this is what I had handy.
I do not take it off in summer due to the fact the greenhouse so far is dormant in summer which I know is a waste of summer growing space. The bw is now degrading and I need to replace it and I have been reading about the Greenhouse bw which is uvi treated. EBay sell 10m x 1.5m for a total of £18.95 which would just be enough for me.
I am sure I read but cannot find it that ordinary large bubble wrap would be suffice for just the winter insulation and I am sure a lot cheaper also for the 10m I would need. Before I commit to ordering it has anyone any comments on the insulation differences between the basic and proper greenhouse bw and is it worth the extra money.
Thank you

 

Is this the same stuff or thinner as it's only £13.50 incl P&P from this seller? 1.5 x 10m UVI treated bubble insulation

I used standard, thick bubble wrap for years and it was so much trouble removing & re-fitting that I just left it on all year round as the greenhouse isn't used in summer and also because it welded itself to the glass.

 

Hi Trogre

I doubt that there is any difference in insulation value. The insulation is produced by the trapped air - not the plastic itself.

In theory you might expect big bubble wrap to be a slightly better insulator than small bubblewrap because on average the trapped air layer is thicker. I understand the optimum thickness for the airspace (and hence insulation) in double glazing is about 3/4 of an inch.

Effectively bubble wrap gives you triple glazing. A single polythene sheet will trap air between the glass and the polythene, giving you double glazing. Using bubble wrap adds an extra layer of trapped air. There is also the benefit of removal of draughts and air leaks.

My light meter tells me that bubble wrap reduces the light level by about 15%.