Insulation for glass roof

[Octofoxy]

Hello,

I'd like to build a greenhouse in a very cold biome. However, the heat just escapes faster from my greenhouse than I can pump it in. Even with tripple walls!

Most modern windows have double- or triple-plane glass for better insulation. Could you maybe add insulation roofing to your mod? It could cost more, but actually keep the heat inside the greenhouse in -40 degree biomes.