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Ron

Greenhouse Insulation

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Has anyone tried insulating there greenhouse using 30g heavy duty horticultural fleece, if so how did it perform.

I have my small greenhouse insulated with triple layered bubble wrap, the glass in this is the standard horticultural glass but in cold weather I notice that my new greenhouse which has 4mm toughened glass and no insulation is 1.2 deg c warmer with no insulation. I was wondering what the effect would be in insulating this one with 30g Fleece.

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Hey Ron,

It's true now they are making a lot of glass with amazing thermal reflective qualities, but have you also checked your thermometers? Mercury or spirit thermometers can be as much as 2 degrees out, and even digital ones can be a bit off. Have you tried swapping the thermometers over then checking the readings? Or placing them together to see how they compare with each other?

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Hi Karsty.

Yes, I had already checked the thermometers, they are both the same brand digital and there is 0.2 deg difference in them which I have taken into account. 

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use a layer of black fabric on the outside , or even better paper/sheet with charcoal on it.

Fleece has good insulating properties when combined with other fabrics but on its own it doesn't work as well.

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5 hours ago, Lodewijkp said:

use a layer of black fabric on the outside , or even better paper/sheet with charcoal on it.

 

?!

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What have you got in the g/h?  I have a single layer of big bubble insulation and a 30W tube heater and that keeps the frost out in all but the worst weather but still lets plenty of light in.  Most CPs survive no problem.

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On 11/21/2017 at 2:23 AM, Dunc said:

What have you got in the g/h?  I have a single layer of big bubble insulation and a 30W tube heater and that keeps the frost out in all but the worst weather but still lets plenty of light in.  Most CPs survive no problem.

Hi Dunc.

I have approx 500 pots of Disa orchids, cephalotus, and some Dionaea, 

I have one greenhouse covered in Triple ply bubble wrap, with a 2kw fan heater thermostatically controlled, the purpose of my post was to see if anyone had used 30gram horticultural fleece to insulate there greenhouse, I had seen adverts suggesting that it was a better insulator than bubble, easier to instal and also you do not get the condensation build up on the fleece, so just testing the water so to speak if someone had tried using it..

Ron

 

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