Greenhouse Broken?

[EasyGroomslayer]

I built a Greenhouse that is 8x10 with entire Glass Roof and 3/4 of each wall is Lead Paned windows with plaster walls. It's been chiseled but, taken and added a few peices for decorations.  it doesn't seem to work at all. Stays same Temp inside as it is outside. playing on vs 1.9.8

[Guimoute]

I believe rooms need to have their faces flat. It can be the inner or outer face but it must be full and not chiseled to work properly.