My new house has a very small kitchen which is actually an extension of the house with its own roof.
I suspect its roof insulation is old and not effective, because this kitchen is quite cold (12 degres celsius sometimes).
Landlord says he doesn't want to inspect insulation because it's contained in a waterproof membrane and we could create a leak just by opening it to look into it.
I was thinking about installing a false ceiling inside my kitchen to improve insulation and prevent heat from escaping so much. The room is like 4 square meters. Is this a good idea?