Adding an Additional Layer of Poly for Greenhouse Insulation? Is it a good idea?

Passive Solar Greenhouse Case Studies: http://bit.ly/2ERJKtY

In this video I answer a question about whether adding an additional layer of poly to your greenhouse glazing will make a thermal dynamic difference. As you add more poly you gain in R-value but you may lose in transmissivity. This can be a real issue for plant health. One of the largest challenges in greenhouse design is keeping heat loss low while letting lots of light in.

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Watch More Rob Avis:
Make a Living With Permaculture/Farming: http://bit.ly/2DEOGCR
Urban Homesteading Video Series: http://bit.ly/2DilqF3
Verge Grad Interview Series: http://bit.ly/2FM9AAE

About Rob Avis and Verge Permaculture:
In less than 10 years, Rob & Michelle Avis left Calgary’s oil fields and retooled his engineering career to help clients and students design integrated systems for shelter, energy, water, waste and food, all while supporting local economy and regenerating the land. He’s now leading the next wave of permaculture education, teaching career-changing professionals to become eco-entrepreneurs with successful regenerative businesses. Learn more and connect with Rob & Michelle at https://vergepermaculture.ca/